CA2079696C - Semiconductor integrated circuit device with fault detecting function - Google Patents
Semiconductor integrated circuit device with fault detecting functionInfo
- Publication number
- CA2079696C CA2079696C CA002079696A CA2079696A CA2079696C CA 2079696 C CA2079696 C CA 2079696C CA 002079696 A CA002079696 A CA 002079696A CA 2079696 A CA2079696 A CA 2079696A CA 2079696 C CA2079696 C CA 2079696C
- Authority
- CA
- Canada
- Prior art keywords
- logic function
- function blocks
- fault
- sense
- integrated circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
- H01L27/04—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body
- H01L27/10—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including a plurality of individual components in a repetitive configuration
- H01L27/118—Masterslice integrated circuits
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/317—Testing of digital circuits
- G01R31/3181—Functional testing
- G01R31/3185—Reconfiguring for testing, e.g. LSSD, partitioning
- G01R31/318533—Reconfiguring for testing, e.g. LSSD, partitioning using scanning techniques, e.g. LSSD, Boundary Scan, JTAG
- G01R31/318583—Design for test
Abstract
A logic function block having an output signal potential sensing function is substituted for each of logic function blocks of which fault conditions cannot be detected on the basis of predetermined input/output signal combinations for determining whether or not the semiconductor integrated circuit device operates correctly. Probe lines and sense lines are connected only to the logic function blocks having output signal potential sensing function. The probe lines are driven from a probe line driver, and a sense line receiver reads out signals on the sense lines. Thus, without reducing fault detecting efficiency, the areas of an active region and a wiring region required for forming a fault detecting arrangement can be reduced.
Description
20796g6 SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE
WITH FAULT DETECTING FUNCTION
This invention relates to a semiconductor integrated circuit device with fault detecting function which enables detection of output signal potentials of respective logic function blocks forming the integrated circuit device, and, more particularly, to such a semiconductor integrated circuit device which can detects fault conditions of the integrated circuit device itself on the basis of predetermined combinations of input/output function signals produced in response to test patterns for checking the operations of the integrated circuit device, and which can also detects fault conditions of logic function blocks that cannot be detected on the basis of the input/output function signal combinations.
BACKGROUND OF THE INVENTION
Some of conventional semiconductor integrated circuit devices have a function to determine fault conditions of logic function blocks in the integrated circuit device based on output signals developed by the respective blocks in response to input signals applied to predetermined test patterns. In this case, fault conditions of only 60-70% of the entire logic function blocks can be detected, but troublesome and complicated efforts have to be made to detect faults in the rest of the blocks.
In an effort to eliminate this problem, semiconductor integrated circuit devices with fault detecting function are disclosed in, for example, an article, "High Performance CMOS
Array with an Embedded Test Structure", pages 4.1.1-4.1.4, IEEE 1990 CUSTOM INTEGRATED CIRCUITS CONFERENCE, in an article, "Embedded test circuitry improves fault detection in digital ASICs", COMPUTER DESIGN, 1 December 1989, and in an article, "CrossCheck: A cell Based VLSI Testability Solution", 26th DAC Proceedin~s, 1989.
Figure 1 shows a basic concept of the prior art devices disclosed in the above-cited articles. In Figure 1, in the 2079~9~
peripheral portions of an integrated circuit device generally denoted by a reference numeral 10, I/O pads 1, 1, 1, ..., 1 for respective sections of the integrated circuits in the device are provided. The integrated circuit device includes a plurality of sense lines 2, 2, ..., 2 and a plurality of probe lines 3, 3, ..., 3, which are used for detecting fault conditions.
The integrated circuit device includes also logic function blocks 41, 42, 43 which perform basic logic functions. As logic function blocks in the integrated circuit device, in addition to AND and NAND circuits shown in Figure 1, OR
circuits, NOR circuits and any other logic circuits can be used depending on aimed functions. A probe line driver 6 is used to drive desired ones of the probe lines 3. A sense line receiver 7 reads out signals from desired sense lines Z. The integrated circuit device 10 further includes input terminals 8 for applying input signals to a logic circuit comprising a plurality of logic function blocks, and an output terminal from deriving an output signal from the logic circuit.
At the output of each of the logic function blocks 41, 42 and 43 of the conventional semiconductor integrated circuit device shown in Figure 1, a sense transistor 12 for sensing an output signal potential, as shown in Figure 2, is disposed.
In Figure 2, a logic function block 4 represents any one of the logic function blocks shown in Figure 1. An output pin 11 of the logic function block 4 is connected to one of the sense lines 2 through the source-drain path of the output signal potential sensing transistor 12 of which the gate is connected to one of the probe lines 3. The output pin 11 is connected also to another logic function block or the output terminal 9 via a line 13.
In order to determine if any one of the respective function blocks of the integrated circuit device is in a fault condition, the integrated circuit is activated to operate, and the probe lines 3 are driven by the probe line driver 6 to sequentially enable the sense transistors 12. Output signals from the respective logic function blocks 4 are read out through the associated sense transistors lZ and the associated sense lines 2 and detected by the sense line receiver 7. Whether the respective logic function blocks 4 are in a fault condition or not is determined based on the output signals read out by the sense line receiver 7.
In order to improve a fault detection efficiency of conventional semiconductor integrated circuit devices with fault detecting function, the probe lines 3 and the sense lines 2 are arranged in a mesh pattern as shown in Figure 1 so that output signal potentials from all of the logic function blocks or from as many logic function blocks as possible can be sensed.
Furthermore, sense transistors for sensing output signal potentials are provided for even those logic function blocks of which fault conditions can be detected based on basic input-output signal combinations produced in accordance with predetermined test patterns. Accordingly, the integrated circuit device requires a large number of sense transistors, a large number of probe lines for enabling the sense transistors, a large number of sense lines for reading output signals from the logic function blocks through the sense transistors, a probe line driver, and a sense line receiver.
These components disadvantageously occupy large areas of active and wiring regions.
The present invention can eliminate the above-described problem, by providing a semiconductor integrated circuit device with fault detection function in which the area of the active and wiring regions used for fault detection is reduced.
SUMMARY OF THE INVENTION
According to the present invention, during designing a semiconductor integrated circuit having a fault detection function, it is determined whether or not there are any logic function blocks of which fault conditions cannot be detected based on the development of predetermined input/output function signal combinations. (Hereinafter, such logic function blocks are referred to as fault-undetectable logicfunction blocks.) If such a fault-undetectable logic function must be used, a logic function block which can sense an output signal potential thereof, such as the one shown in Figure 2, is used only for that fault-undetectable logic function block.
According to the present invention, only fault-undetectable logic function blocks, the fault condition of which cannot be detected on the basis of input/output function signal combinations, are configured in the form of a logic function block with output signal potential sensing function, which makes it possible to reduce the number of sense transistors and, hence, the number of probe and sense lines for driving and monitoring sense transistors. This further enables reduction of sizes of a probe line driver and a sense line receiver, which enables reduction of the portions of the active area and the wiring area which would otherwise be used for realizing the fault detection.
In accordance with the present invention, there ls provided a semiconductor integrated circuit device including a plurality of logic function blocks, said logic function blocks including logic circuits, such as an AND circuit, an NAND
circuit, an OR circuit and an NOR circuit, part of said plurality of logic function blocks belng fault-detectable logic function blocks of which fault condltions can be detected on the basis of predetermined combinations of input/output function signals based on a test pattern for use in examining the functions of said semiconductor inteqrated circuit device, the rest of said plurality of logic function blocks being substitute logic function blocks which are substituted for fault-undetectable logic function blocks of which fault conditlons cannot be detected on the basis of predetermined combinations of input/output function signals based on said test pattern, each of said substitute logic function blocks comprising a corresponding fault-undetectable logic function for which that substitute logic function block is to be substituted, and a signal potentlal detecting sense transistor connected to the output of said corresponding fault-undetectable logic function;
said semiconductor integrated circuit device further comprising:
a plurality of probe lines and a plurality of sense lines, said probe and sense lines being connected to the sense transistors of said substitute logic function blocks;
a probe line driver for sequentially driving respective ones of said probe lines to render conductive the sense transistors connected to the driven probe lines, whereby the output potentials of said fault-undetectable logic function blocks connected to the conductive sense transistors are ~0 transmitted to said sense lines; and a sense line receiver for reading the output potentials of said fault-undetectable logic function blocks of said substitute logic function blocks as transmitted to said sense lines.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a schematic diagram showing a basic concept of a conventional semiconductor integrated circuit device with fault detecting function;
- 4a -i 65259-144 ~ ~ 7 ~
Figure 2 shows an example of a logic function block which is capable of sensing an output signal potential thereof;
Figure 3 is a schematic diagram showing a basic concept of a semiconductor integrated circuit device with a fault detecting function according to the present invention;
and Figure 4 is a flow chart of testing whether particular logic function blocks are fault-detectable or not on the basis of predetermined input/output signal combinations, which is carried out during deslgning a semiconductor integrated circuit device of the present invention.
DESCRIPTION OF PREFERRED EMBODIMENTS
Figure 3 shows a semiconductor integrated circuit device with fault detection function according to one embodiment of the present invention. A semiconductor integrated circuit - 4b -device, generally designated by a reference numeral 20, includes I/0 pads 21 respective ones of which are for components disposed in the integrated circuit. The semiconductor integrated circuit device 20 of the present invention includes logic function blocks 51, 52, 53 etc. which are similar to the ones included in the conventional integrated circuit device shown in Figure 1.
For the reason which will be described later, only the logic function block 53, for example, is configured as a logic function block with output signal potential sensing function including a sense transistor 12 like the one shown in Figure 2. A sense line 22 and a probe line 23 are connected to the logic function block 53. Input terminals 8 are connected to a logic circuit formed by particular logic function blocks for applying input signals thereto, and an output terminal 9 is connected to a logic circuit formed by another logic function blocks for deriving an output signal therefrom. The probe line 23 is connected to a probe line driver 26, and the sense line 22 is connected to a signal reading sense line receiver 27.
The semiconductor integrated circuit device with fault detecting function of the present invention is designed and fabricated based on the result of test, which is conducted according to a flow chart such as one shown in Figure 4 to determine as to whether fault conditions of particular logic function blocks are detectable or not based on predetermined input/output signal combinations.
In a step 101, a function testing input/output test pattern is generated to perform a fault simulation for common semicon-ductor integrated circuit devices.
Next, in a step 102, basic signals prepared according to the input/output test pattern are used to find, if any, the presence of fault-undetectable logic function blocks, i.e.
logic function blocks of which fault conditions cannot be detected with such basic signals.
In a step 103, a logic function block with fault detecting function including a sense transistor 12 like the one shown in Figure 2 is substituted only for the fault-undetectable logic function block found in the step 102 In the semiconductor integrated circuit device of the present invention shown in Figure 3, the logic function block 53 is the thus substituted logic function block with output signal potential sensing function.
By the above-mentioned technique, semiconductor integrated circuit devices with a fault detecting capability increased to 100% or to a desired level are fabricated. In a step 104, the input/output signal combinations expected for ordinary logic function blocks are used to detect if there is any fault condition in any of ordinary logic function blOcksr and also signals from logic function blocks with an output signal potential sensing function are examined whether such blocks are in fault condition or not. Thus, substantially all of the logic function blocks in the semiconductor integrated circuit device can be examined for fault conditions. Thus, the semiconductor integrated circuit device which incorporates, as part thereof, the logic function block 53 with output signal potential sensing function for detecting a fault condition thereof, shown in Figure 3, is provided.
In ordinary semiconductor integrated circuit devices, 30% to 40% of logic function blocks are ones of which fault conditions cannot be detected by means of predetermined basic signals prepared according to an input/output test pattern as used in the step 102. Accordingly, in the semiconductor integrated circuit device of the present invention, 30-40%
of the logic function blocks of the device are configured as a logic function block with output signal potential sensing function shown in Figure 2, and the rest, 60-70%, of the blocks are tested based on predetermined input/output signal combinations generated in response to a predetermined test pattern.
In summary, according to the present invention, only those logic function blocks of which fault conditions cannot be be detected based on expected basic input/output signal combinations produced in response to a predetermined test pattern, are configured in a logic function block form so as to have an output signal potential sensing function. This can reduce the numbers of sense transistors, probe lines and sense lines to 30-40% relative to the conventional semiconductor integrated circuit device shown in Figure 1. In addition, the sizes of a probe line driver and a sense line receiver can be reduced. Thus, without reducing the fault detecting capability, the areas of active region and wiring region which are required for providing a fault detecting function can be reduced, and, accordingly, the effective space usable for the purpose of the integrated circuit function can be increased.
WITH FAULT DETECTING FUNCTION
This invention relates to a semiconductor integrated circuit device with fault detecting function which enables detection of output signal potentials of respective logic function blocks forming the integrated circuit device, and, more particularly, to such a semiconductor integrated circuit device which can detects fault conditions of the integrated circuit device itself on the basis of predetermined combinations of input/output function signals produced in response to test patterns for checking the operations of the integrated circuit device, and which can also detects fault conditions of logic function blocks that cannot be detected on the basis of the input/output function signal combinations.
BACKGROUND OF THE INVENTION
Some of conventional semiconductor integrated circuit devices have a function to determine fault conditions of logic function blocks in the integrated circuit device based on output signals developed by the respective blocks in response to input signals applied to predetermined test patterns. In this case, fault conditions of only 60-70% of the entire logic function blocks can be detected, but troublesome and complicated efforts have to be made to detect faults in the rest of the blocks.
In an effort to eliminate this problem, semiconductor integrated circuit devices with fault detecting function are disclosed in, for example, an article, "High Performance CMOS
Array with an Embedded Test Structure", pages 4.1.1-4.1.4, IEEE 1990 CUSTOM INTEGRATED CIRCUITS CONFERENCE, in an article, "Embedded test circuitry improves fault detection in digital ASICs", COMPUTER DESIGN, 1 December 1989, and in an article, "CrossCheck: A cell Based VLSI Testability Solution", 26th DAC Proceedin~s, 1989.
Figure 1 shows a basic concept of the prior art devices disclosed in the above-cited articles. In Figure 1, in the 2079~9~
peripheral portions of an integrated circuit device generally denoted by a reference numeral 10, I/O pads 1, 1, 1, ..., 1 for respective sections of the integrated circuits in the device are provided. The integrated circuit device includes a plurality of sense lines 2, 2, ..., 2 and a plurality of probe lines 3, 3, ..., 3, which are used for detecting fault conditions.
The integrated circuit device includes also logic function blocks 41, 42, 43 which perform basic logic functions. As logic function blocks in the integrated circuit device, in addition to AND and NAND circuits shown in Figure 1, OR
circuits, NOR circuits and any other logic circuits can be used depending on aimed functions. A probe line driver 6 is used to drive desired ones of the probe lines 3. A sense line receiver 7 reads out signals from desired sense lines Z. The integrated circuit device 10 further includes input terminals 8 for applying input signals to a logic circuit comprising a plurality of logic function blocks, and an output terminal from deriving an output signal from the logic circuit.
At the output of each of the logic function blocks 41, 42 and 43 of the conventional semiconductor integrated circuit device shown in Figure 1, a sense transistor 12 for sensing an output signal potential, as shown in Figure 2, is disposed.
In Figure 2, a logic function block 4 represents any one of the logic function blocks shown in Figure 1. An output pin 11 of the logic function block 4 is connected to one of the sense lines 2 through the source-drain path of the output signal potential sensing transistor 12 of which the gate is connected to one of the probe lines 3. The output pin 11 is connected also to another logic function block or the output terminal 9 via a line 13.
In order to determine if any one of the respective function blocks of the integrated circuit device is in a fault condition, the integrated circuit is activated to operate, and the probe lines 3 are driven by the probe line driver 6 to sequentially enable the sense transistors 12. Output signals from the respective logic function blocks 4 are read out through the associated sense transistors lZ and the associated sense lines 2 and detected by the sense line receiver 7. Whether the respective logic function blocks 4 are in a fault condition or not is determined based on the output signals read out by the sense line receiver 7.
In order to improve a fault detection efficiency of conventional semiconductor integrated circuit devices with fault detecting function, the probe lines 3 and the sense lines 2 are arranged in a mesh pattern as shown in Figure 1 so that output signal potentials from all of the logic function blocks or from as many logic function blocks as possible can be sensed.
Furthermore, sense transistors for sensing output signal potentials are provided for even those logic function blocks of which fault conditions can be detected based on basic input-output signal combinations produced in accordance with predetermined test patterns. Accordingly, the integrated circuit device requires a large number of sense transistors, a large number of probe lines for enabling the sense transistors, a large number of sense lines for reading output signals from the logic function blocks through the sense transistors, a probe line driver, and a sense line receiver.
These components disadvantageously occupy large areas of active and wiring regions.
The present invention can eliminate the above-described problem, by providing a semiconductor integrated circuit device with fault detection function in which the area of the active and wiring regions used for fault detection is reduced.
SUMMARY OF THE INVENTION
According to the present invention, during designing a semiconductor integrated circuit having a fault detection function, it is determined whether or not there are any logic function blocks of which fault conditions cannot be detected based on the development of predetermined input/output function signal combinations. (Hereinafter, such logic function blocks are referred to as fault-undetectable logicfunction blocks.) If such a fault-undetectable logic function must be used, a logic function block which can sense an output signal potential thereof, such as the one shown in Figure 2, is used only for that fault-undetectable logic function block.
According to the present invention, only fault-undetectable logic function blocks, the fault condition of which cannot be detected on the basis of input/output function signal combinations, are configured in the form of a logic function block with output signal potential sensing function, which makes it possible to reduce the number of sense transistors and, hence, the number of probe and sense lines for driving and monitoring sense transistors. This further enables reduction of sizes of a probe line driver and a sense line receiver, which enables reduction of the portions of the active area and the wiring area which would otherwise be used for realizing the fault detection.
In accordance with the present invention, there ls provided a semiconductor integrated circuit device including a plurality of logic function blocks, said logic function blocks including logic circuits, such as an AND circuit, an NAND
circuit, an OR circuit and an NOR circuit, part of said plurality of logic function blocks belng fault-detectable logic function blocks of which fault condltions can be detected on the basis of predetermined combinations of input/output function signals based on a test pattern for use in examining the functions of said semiconductor inteqrated circuit device, the rest of said plurality of logic function blocks being substitute logic function blocks which are substituted for fault-undetectable logic function blocks of which fault conditlons cannot be detected on the basis of predetermined combinations of input/output function signals based on said test pattern, each of said substitute logic function blocks comprising a corresponding fault-undetectable logic function for which that substitute logic function block is to be substituted, and a signal potentlal detecting sense transistor connected to the output of said corresponding fault-undetectable logic function;
said semiconductor integrated circuit device further comprising:
a plurality of probe lines and a plurality of sense lines, said probe and sense lines being connected to the sense transistors of said substitute logic function blocks;
a probe line driver for sequentially driving respective ones of said probe lines to render conductive the sense transistors connected to the driven probe lines, whereby the output potentials of said fault-undetectable logic function blocks connected to the conductive sense transistors are ~0 transmitted to said sense lines; and a sense line receiver for reading the output potentials of said fault-undetectable logic function blocks of said substitute logic function blocks as transmitted to said sense lines.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a schematic diagram showing a basic concept of a conventional semiconductor integrated circuit device with fault detecting function;
- 4a -i 65259-144 ~ ~ 7 ~
Figure 2 shows an example of a logic function block which is capable of sensing an output signal potential thereof;
Figure 3 is a schematic diagram showing a basic concept of a semiconductor integrated circuit device with a fault detecting function according to the present invention;
and Figure 4 is a flow chart of testing whether particular logic function blocks are fault-detectable or not on the basis of predetermined input/output signal combinations, which is carried out during deslgning a semiconductor integrated circuit device of the present invention.
DESCRIPTION OF PREFERRED EMBODIMENTS
Figure 3 shows a semiconductor integrated circuit device with fault detection function according to one embodiment of the present invention. A semiconductor integrated circuit - 4b -device, generally designated by a reference numeral 20, includes I/0 pads 21 respective ones of which are for components disposed in the integrated circuit. The semiconductor integrated circuit device 20 of the present invention includes logic function blocks 51, 52, 53 etc. which are similar to the ones included in the conventional integrated circuit device shown in Figure 1.
For the reason which will be described later, only the logic function block 53, for example, is configured as a logic function block with output signal potential sensing function including a sense transistor 12 like the one shown in Figure 2. A sense line 22 and a probe line 23 are connected to the logic function block 53. Input terminals 8 are connected to a logic circuit formed by particular logic function blocks for applying input signals thereto, and an output terminal 9 is connected to a logic circuit formed by another logic function blocks for deriving an output signal therefrom. The probe line 23 is connected to a probe line driver 26, and the sense line 22 is connected to a signal reading sense line receiver 27.
The semiconductor integrated circuit device with fault detecting function of the present invention is designed and fabricated based on the result of test, which is conducted according to a flow chart such as one shown in Figure 4 to determine as to whether fault conditions of particular logic function blocks are detectable or not based on predetermined input/output signal combinations.
In a step 101, a function testing input/output test pattern is generated to perform a fault simulation for common semicon-ductor integrated circuit devices.
Next, in a step 102, basic signals prepared according to the input/output test pattern are used to find, if any, the presence of fault-undetectable logic function blocks, i.e.
logic function blocks of which fault conditions cannot be detected with such basic signals.
In a step 103, a logic function block with fault detecting function including a sense transistor 12 like the one shown in Figure 2 is substituted only for the fault-undetectable logic function block found in the step 102 In the semiconductor integrated circuit device of the present invention shown in Figure 3, the logic function block 53 is the thus substituted logic function block with output signal potential sensing function.
By the above-mentioned technique, semiconductor integrated circuit devices with a fault detecting capability increased to 100% or to a desired level are fabricated. In a step 104, the input/output signal combinations expected for ordinary logic function blocks are used to detect if there is any fault condition in any of ordinary logic function blOcksr and also signals from logic function blocks with an output signal potential sensing function are examined whether such blocks are in fault condition or not. Thus, substantially all of the logic function blocks in the semiconductor integrated circuit device can be examined for fault conditions. Thus, the semiconductor integrated circuit device which incorporates, as part thereof, the logic function block 53 with output signal potential sensing function for detecting a fault condition thereof, shown in Figure 3, is provided.
In ordinary semiconductor integrated circuit devices, 30% to 40% of logic function blocks are ones of which fault conditions cannot be detected by means of predetermined basic signals prepared according to an input/output test pattern as used in the step 102. Accordingly, in the semiconductor integrated circuit device of the present invention, 30-40%
of the logic function blocks of the device are configured as a logic function block with output signal potential sensing function shown in Figure 2, and the rest, 60-70%, of the blocks are tested based on predetermined input/output signal combinations generated in response to a predetermined test pattern.
In summary, according to the present invention, only those logic function blocks of which fault conditions cannot be be detected based on expected basic input/output signal combinations produced in response to a predetermined test pattern, are configured in a logic function block form so as to have an output signal potential sensing function. This can reduce the numbers of sense transistors, probe lines and sense lines to 30-40% relative to the conventional semiconductor integrated circuit device shown in Figure 1. In addition, the sizes of a probe line driver and a sense line receiver can be reduced. Thus, without reducing the fault detecting capability, the areas of active region and wiring region which are required for providing a fault detecting function can be reduced, and, accordingly, the effective space usable for the purpose of the integrated circuit function can be increased.
Claims
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A semiconductor integrated circuit device including a plurality of logic function blocks, said logic function blocks including logic circuits, such as an AND circuit, an NAND circuit, an OR circuit and an NOR circuit, part of said plurality of logic function blocks being fault-detectable logic function blocks of which fault conditions can be detected on the basis of predetermined combinations of input/output function signals based on a test pattern for use in examining the functions of said semiconductor integrated circuit device, the rest of said plurality of logic function blocks being substitute logic function blocks which are substituted for fault-undetectable logic function blocks of which fault conditions cannot be detected on the basis of predetermined combinations of input/output function signals based on said test pattern, each of said substitute logic function blocks comprising a corresponding fault-undetectable logic function for which that substitute logic function block is to be substituted, and a signal potential detecting sense transistor connected to the output of said corresponding fault-undetectable logic function;
said semiconductor integrated circuit device further comprising:
a plurality of probe lines and a plurality of sense lines, said probe and sense lines being connected to the sense transistors of said substitute logic function blocks;
a probe line driver for sequentially driving respective ones of said probe lines to render conductive the sense transistors connected to the driven probe lines, whereby the output potentials of said fault-undetectable logic function blocks connected to the conductive sense transistors are transmitted to said sense lines; and a sense line receiver for reading the output potentials of said fault-undetectable logic function blocks of said substitute logic function blocks as transmitted to said sense lines.
said semiconductor integrated circuit device further comprising:
a plurality of probe lines and a plurality of sense lines, said probe and sense lines being connected to the sense transistors of said substitute logic function blocks;
a probe line driver for sequentially driving respective ones of said probe lines to render conductive the sense transistors connected to the driven probe lines, whereby the output potentials of said fault-undetectable logic function blocks connected to the conductive sense transistors are transmitted to said sense lines; and a sense line receiver for reading the output potentials of said fault-undetectable logic function blocks of said substitute logic function blocks as transmitted to said sense lines.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3-256346 | 1991-10-03 | ||
| JP3256346A JP2884847B2 (en) | 1991-10-03 | 1991-10-03 | Method of manufacturing semiconductor integrated circuit device having failure detection function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2079696A1 CA2079696A1 (en) | 1993-04-04 |
| CA2079696C true CA2079696C (en) | 1999-05-11 |
Family
ID=17291404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002079696A Expired - Fee Related CA2079696C (en) | 1991-10-03 | 1992-10-02 | Semiconductor integrated circuit device with fault detecting function |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5396500A (en) |
| JP (1) | JP2884847B2 (en) |
| CA (1) | CA2079696C (en) |
| DE (1) | DE4233271C2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2884847B2 (en) | 1991-10-03 | 1999-04-19 | 三菱電機株式会社 | Method of manufacturing semiconductor integrated circuit device having failure detection function |
| DE4341959C2 (en) * | 1993-12-09 | 1997-07-03 | Bosch Gmbh Robert | Integrated circuit with improved wiring and method of making an integrated circuit with improved wiring |
| DE4406510C1 (en) * | 1994-02-28 | 1995-07-13 | Siemens Ag | Integrated circuit with integrated test device |
| JPH09107048A (en) | 1995-03-30 | 1997-04-22 | Mitsubishi Electric Corp | Semiconductor package |
| JP2004296928A (en) * | 2003-03-27 | 2004-10-21 | Matsushita Electric Ind Co Ltd | Semiconductor device, system device using the same, and its manufacturing method |
| KR100641706B1 (en) * | 2004-11-03 | 2006-11-03 | 주식회사 하이닉스반도체 | On-chip self test circuit and self test method of signal distortion |
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| FR2595474B1 (en) * | 1986-03-04 | 1988-06-24 | Texas Instruments France | DEVICE FOR MONITORING AND VERIFYING THE OPERATION OF BLOCKS INTERNAL TO AN INTEGRATED CIRCUIT |
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| US5065090A (en) * | 1988-07-13 | 1991-11-12 | Cross-Check Technology, Inc. | Method for testing integrated circuits having a grid-based, "cross-check" te |
| JPH0247574A (en) * | 1988-08-10 | 1990-02-16 | Toshiba Corp | Semiconductor integrated circuit device and operation testing method |
| US4937826A (en) * | 1988-09-09 | 1990-06-26 | Crosscheck Technology, Inc. | Method and apparatus for sensing defects in integrated circuit elements |
| JPH03128475A (en) * | 1989-10-13 | 1991-05-31 | Hitachi Ltd | Logic circuit with logical test function |
| US5202624A (en) * | 1990-08-31 | 1993-04-13 | Cross-Check Technology, Inc. | Interface between ic operational circuitry for coupling test signal from internal test matrix |
| JP3138286B2 (en) * | 1991-05-15 | 2001-02-26 | 株式会社メガチップス | Test method and test apparatus for semiconductor integrated circuit |
| JP2884847B2 (en) | 1991-10-03 | 1999-04-19 | 三菱電機株式会社 | Method of manufacturing semiconductor integrated circuit device having failure detection function |
-
1991
- 1991-10-03 JP JP3256346A patent/JP2884847B2/en not_active Expired - Fee Related
-
1992
- 1992-10-02 DE DE4233271A patent/DE4233271C2/en not_active Expired - Fee Related
- 1992-10-02 US US07/955,655 patent/US5396500A/en not_active Expired - Lifetime
- 1992-10-02 CA CA002079696A patent/CA2079696C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0599988A (en) | 1993-04-23 |
| DE4233271C2 (en) | 1995-06-01 |
| JP2884847B2 (en) | 1999-04-19 |
| US5396500A (en) | 1995-03-07 |
| DE4233271A1 (en) | 1993-04-08 |
| CA2079696A1 (en) | 1993-04-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |