DE10246343B4 - Method for producing a semiconductor memory cell array - Google Patents
Method for producing a semiconductor memory cell array Download PDFInfo
- Publication number
- DE10246343B4 DE10246343B4 DE10246343A DE10246343A DE10246343B4 DE 10246343 B4 DE10246343 B4 DE 10246343B4 DE 10246343 A DE10246343 A DE 10246343A DE 10246343 A DE10246343 A DE 10246343A DE 10246343 B4 DE10246343 B4 DE 10246343B4
- Authority
- DE
- Germany
- Prior art keywords
- word lines
- bit
- lines
- semiconductor body
- bit lines
- 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
- 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
-
- 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
Verfahren
zur Herstellung eines Halbleiterspeicherzellenfeldes, bei dem
planare
Speicherzellen in einem Halbleiterkörper (1) ausgebildet werden,
die jeweils zwei Source-/Drain-Bereiche und einen dazwischen vorhandenen
Kanalbereich umfassen, wobei auf dem Kanalbereich ein jeweiliges
Gate-Dielektrikum (7) und darüber
eine jeweilige Gate-Elektrode angeordnet werden,
die Source-/Drain-Bereiche
(20) spaltenweise verbindende Bitleitungen (2) durch Einbringen
von Dotierstoff in dem Halbleiterkörper (1) ausgebildet werden,
darüber angeordnete
Bitleitungsisolationen (3) aus elektrisch isolierendem Material
hergestellt werden und
die Gate-Elektroden zeilenweise verbindende
Wortleitungen (4) durch Aufbringen und Strukturieren einer Schicht aus
elektrisch leitfähigem
Material quer zu den Bitleitungen verlaufend hergestellt werden,
so dass diese Wortleitungen (4) von den Bitleitungen (2) durch die
Bitleitungsisolationen (3) und das Gate-Dielektrikum (7) elektrisch
isoliert sind,
dadurch gekennzeichnet, dass
auf die Wortleitungen
gleichartig strukturierte Deckschichten (5) aufgebracht werden und
unter Verwendung dieser Deckschichten (5) und der Bitleitungsisolationen
(3) als Maske zwischen den Bitleitungen (2) und zwischen den Wortleitungen...Method for producing a semiconductor memory cell array, in which
planar memory cells are formed in a semiconductor body (1), each comprising two source / drain regions and a channel region therebetween, wherein on the channel region a respective gate dielectric (7) and above a respective gate electrode are arranged,
the source / drain regions (20) are formed in column-wise connecting bit lines (2) by introducing dopant into the semiconductor body (1),
above arranged bit line insulations (3) are made of electrically insulating material and
the gate electrodes are connected line by line word lines (4) by applying and structuring a layer of electrically conductive material transversely to the bit lines made so that these word lines (4) from the bit lines (2) through the bit line insulations (3) and the gate Dielectric (7) are electrically isolated,
characterized in that
on the word lines similarly structured cover layers (5) are applied and using these cover layers (5) and the bit line insulations (3) as a mask between the bit lines (2) and between the word lines ...
Description
Die vorliegende Erfindung betrifft ein Herstellungsverfahren für ein Halbleiterspeicherzellenfeld mit planaren Speicherzellen, die gegeneinander durch Isolationsbereiche im Halbleiterkörper isoliert sind.The The present invention relates to a manufacturing method for a semiconductor memory cell array planar memory cells facing each other through isolation areas in the semiconductor body are isolated.
Planare Speicherzellen, insbesondere Charge-trapping-Speicherzellen in SONOS-Technologie (WO 02/45171 A1) 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 (WO 02/45171 A1) or specifically NROM technology, are by electric insulating areas between the word lines and between the Bit lines electrically isolated from each other. These electrically insulating Areas are made by using the surface Dopant is introduced as insulation implantation. The implantation of However, dopant influences very much especially in memory cells small dimensions, the electrical behavior of the cells.
In
der
Die
Aufgabe der vorliegenden Erfindung ist es, eine verbesserte Möglichkeit zur elektrischen Isolation planarer Speicherzellen in einem Halbleiterspeicherzellenfeld anzugeben.task The present invention is an improved possibility for the electrical isolation of planar memory cells in a semiconductor memory cell array specify.
Diese Aufgabe wird mit dem Verfahren zur Herstellung eines Halbleiterspeicherzellenfeldes mit den Merkmalen des Anspruches 1 gelöst. Ausgestaltungen ergeben sich aus den abhängigen Ansprüchen.These Task is with the method for producing a semiconductor memory cell array solved with the features of claim 1. Embodiments result from the dependent ones 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 problem mentioned by putting in the intermediate areas between the Bit lines and between the word lines introduced an oxide isolation becomes. For this purpose, after the structuring of the word lines, a trench etching in the semiconductor body, z. As a silicon substrate, performed to recesses in the Semiconductor body manufacture.
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.at this etching For example, the buried bit lines that are doped regions in the semiconductor body are trained through it arranged bit line insulations, in particular an oxide, protected. The etched Recesses are filled with oxide. In the areas, each between two word lines in the Semiconductor material of the semiconductor body at those locations are present at which no buried bit lines present isolations are made 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 (4)
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 DE10246343A1 (en) | 2004-04-22 |
DE10246343B4 true 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 |
---|---|
DE (1) | DE10246343B4 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006090477A1 (en) | 2005-02-25 | 2006-08-31 | Spansion Llc | Semiconductor device and method for manufacturing same |
US7948052B2 (en) | 2006-12-18 | 2011-05-24 | Spansion Llc | Dual-bit memory device having trench isolation material disposed near bit line contact areas |
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 |
Also Published As
Publication number | Publication date |
---|---|
DE10246343A1 (en) | 2004-04-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
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 |