DE10246343A1 - Semiconductor memory cell field used in SONOS and NPROM technology has isolation regions formed by recesses filled with dielectric material in a semiconductor body arranged between the bit lines and between the word lines - Google Patents
Semiconductor memory cell field used in SONOS and NPROM technology has isolation regions formed by recesses filled with dielectric material in a semiconductor body arranged between the bit lines and between the word lines Download PDFInfo
- Publication number
- DE10246343A1 DE10246343A1 DE10246343A DE10246343A DE10246343A1 DE 10246343 A1 DE10246343 A1 DE 10246343A1 DE 10246343 A DE10246343 A DE 10246343A DE 10246343 A DE10246343 A DE 10246343A DE 10246343 A1 DE10246343 A1 DE 10246343A1
- Authority
- DE
- Germany
- Prior art keywords
- bit lines
- word lines
- semiconductor
- lines
- semiconductor body
- 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.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/76—Making of isolation regions between components
- H01L21/762—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers
- H01L21/76202—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using a local oxidation of silicon, e.g. LOCOS, SWAMI, SILO
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/76—Making of isolation regions between components
- H01L21/762—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers
- H01L21/76224—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using trench refilling with dielectric materials
- H01L21/76232—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using trench refilling with dielectric materials of trenches having a shape other than rectangular or V-shape, e.g. rounded corners, oblique or rounded trench walls
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B43/00—EEPROM devices comprising charge-trapping gate insulators
- H10B43/30—EEPROM devices comprising charge-trapping gate insulators characterised by the memory core region
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B69/00—Erasable-and-programmable ROM [EPROM] devices not provided for in groups H10B41/00 - H10B63/00, e.g. ultraviolet erasable-and-programmable ROM [UVEPROM] devices
Abstract
Description
Halbleiterspeicherzellenfeld und Verfahren zur Herstellung eines HalbleiterspeicherzellenfeldesSemiconductor memory cell array and Method for producing a semiconductor memory cell array
Die vorliegende Erfindung betrifft ein Halbleiterspeicherzellenfeld mit planaren Speicherzellen, die gegeneinander durch Isolationsbereiche im Halbleiterkörper isoliert sind. Außerdem wird ein zugehöriges Herstellungsverfahren angegeben.The present invention relates to a semiconductor memory cell array with planar memory cells that isolated from each other by isolation areas in the semiconductor body are. Moreover becomes an associated Manufacturing process specified.
Planare Speicherzellen, insbesondere Charge-trapping-Speicherzellen in SONOS-Technologie oder speziell NROM-Technologie, werden durch elektrisch isolierende Bereiche zwischen den Wortleitungen und zwischen den Bitleitungen elektrisch voneinander isoliert. Diese elektrisch isolierenden Bereiche werden dadurch hergestellt, dass von der Oberfläche her Dotierstoff als Isolationsimplantation eingebracht wird. Die Implantation von Dotierstoff beeinflusst jedoch besonders bei Speicherzellen sehr kleiner Abmessungen das elektrische Verhalten der Zellen.Planar memory cells, in particular Charge trapping memory cells in SONOS technology or special NROM technology, are separated by electrically insulating areas the word lines and between the bit lines electrically from each other isolated. This will make these electrically insulating areas made that from the surface Her dopant is introduced as an insulation implantation. The However, implantation of dopant particularly affects memory cells very small dimensions the electrical behavior of the cells.
Aufgabe der vorliegenden Erfindung ist es, eine verbesserte Möglichkeit zur elektrischen Isolation planarer Speicherzellen in einem Halbleiterspeicherzellenfeld anzugeben.Object of the present invention is an improved way for the electrical isolation of planar memory cells in a semiconductor memory cell array specify.
Diese Aufgabe wird mit dem Halbleiterspeicherzellenfeld mit den Merkmalen des Anspruches 1 bzw. mit dem Verfahren zur Herstellung eines Halbleiterspeicherzellenfeldes mit den Merkmalen des Anspruches 3 gelöst. Ausgestaltungen ergeben sich aus den abhängigen Ansprüchen.This task is accomplished with the semiconductor memory cell array with the features of claim 1 or with the method for manufacturing a semiconductor memory cell array with the features of the claim 3 solved. Refinements result from the dependent claims.
Die Erfindung löst das genannte Problem, indem in die Zwischenbereiche zwischen den Bitleitungen und zwischen den Wortleitungen eine Oxidisolation eingebracht wird. Dazu wird nach der Strukturierung der Wortleitungen eine Grabenätzung in den Halbleiterkörper, z.B. ein Siliziumsubstrat, durchgeführt, um Aussparungen in dem Halbleiterkörper herzustellen.The invention solves the above problem by in the intermediate areas between the bit lines and between the Word lines an oxide insulation is introduced. This will be done after a trench etching into the semiconductor body, e.g. a silicon substrate, performed to create recesses in the semiconductor body.
Bei dieser Ätzung werden die vergrabenen Bitleitungen, die als dotierte Bereiche in dem Halbleiterkörper ausgebildet sind, durch darüber angeordnete Bitleitungsisolationen, insbesondere ein Oxid, geschützt. Die geätzten Aussparungen werden mit Oxid gefüllt. In den Bereichen, die jeweils zwischen zwei Wortleitungen in dem Halbleitermaterial des Halbleiterkörpers an denjenigen Stellen vorhanden sind, an denen keine vergrabenen Bitleitungen vorhanden sind, werden auf diese Weise Isolationen hergestellt, ohne dass die mit implantierten Dotierstoffen verbundenen Probleme auftreten.With this etching, the buried bit lines, which are formed as doped regions in the semiconductor body, by about that arranged bit line insulation, in particular an oxide, protected. The etched Gaps are filled with oxide. In the areas between two word lines in the Semiconductor material of the semiconductor body at those points are present on which there are no buried bit lines insulation is produced in this way without the problems associated with implanted dopants occur.
Es folgt eine genauere Beschreibung
von Beispielen des Halbleiterspeicherzellenfeldes und des Herstellungsverfahrens
anhand der
Die
Die
Die
Die
Die
Der Aufbau des Halbleiterspeicherzellenfeldes
wird nachfolgend anhand der wesentlichen Herstellungsschritte eines
bevorzugten Herstellungsverfahrens beschrieben. In der
Auf den Bitleitungen
Die
In Bereichen zwischen den Wortleitungen
Die
Die
Die
- 11
- HalbleiterkörperSemiconductor body
- 22
- Bitleitungbit
- 33
- BitleitungsisolationBitleitungsisolation
- 44
- Wortleitungwordline
- 55
- Deckschichttopcoat
- 66
- SeitenwandisolationSidewall insulation
- 77
- Gate-DielektrikumGate dielectric
- 88th
- Oxidschichtoxide
- 99
- IsolationsbereichQuarantine
- 1010
- Grabenisolationgrave insulation
- 2020
- Source-/Drain-BereichSource / drain region
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10246343A DE10246343B4 (en) | 2002-10-04 | 2002-10-04 | Method for producing a semiconductor memory cell array |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10246343A DE10246343B4 (en) | 2002-10-04 | 2002-10-04 | Method for producing a semiconductor memory cell array |
Publications (2)
Publication Number | Publication Date |
---|---|
DE10246343A1 true DE10246343A1 (en) | 2004-04-22 |
DE10246343B4 DE10246343B4 (en) | 2007-02-08 |
Family
ID=32038254
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE10246343A Expired - Fee Related DE10246343B4 (en) | 2002-10-04 | 2002-10-04 | Method for producing a semiconductor memory cell array |
Country Status (1)
Country | Link |
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DE (1) | DE10246343B4 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008076978A1 (en) * | 2006-12-18 | 2008-06-26 | Spansion Llc | Dual-bit memory device having trench isolation material disposed near bit line contact areas |
US7968404B2 (en) | 2005-02-25 | 2011-06-28 | Spansion Llc | Semiconductor device and fabrication method therefor |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5479036A (en) * | 1993-12-02 | 1995-12-26 | United Microelectronics Corporation | Fieldless split-gate EPROM/Flash EPROM |
US6060357A (en) * | 1999-02-03 | 2000-05-09 | United Semiconductor Corp. | Method of manufacturing flash memory |
WO2002045171A1 (en) * | 2000-11-28 | 2002-06-06 | Advanced Micro Devices, Inc. | Planar structure and methods of fabricating non-volatile memory devices |
-
2002
- 2002-10-04 DE DE10246343A patent/DE10246343B4/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5479036A (en) * | 1993-12-02 | 1995-12-26 | United Microelectronics Corporation | Fieldless split-gate EPROM/Flash EPROM |
US6060357A (en) * | 1999-02-03 | 2000-05-09 | United Semiconductor Corp. | Method of manufacturing flash memory |
WO2002045171A1 (en) * | 2000-11-28 | 2002-06-06 | Advanced Micro Devices, Inc. | Planar structure and methods of fabricating non-volatile memory devices |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7968404B2 (en) | 2005-02-25 | 2011-06-28 | Spansion Llc | Semiconductor device and fabrication method therefor |
WO2008076978A1 (en) * | 2006-12-18 | 2008-06-26 | Spansion Llc | Dual-bit memory device having trench isolation material disposed near bit line contact areas |
US7948052B2 (en) | 2006-12-18 | 2011-05-24 | Spansion Llc | Dual-bit memory device having trench isolation material disposed near bit line contact areas |
Also Published As
Publication number | Publication date |
---|---|
DE10246343B4 (en) | 2007-02-08 |
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Legal Events
Date | Code | Title | Description |
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OP8 | Request for examination as to paragraph 44 patent law | ||
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: QIMONDA AG, 81739 MUENCHEN, DE |
|
8339 | Ceased/non-payment of the annual fee |