DE102007019761A1 - Electrically conductive contact unit producing method for memory module, involves utilizing two adjoining structures of semiconductor component for producing contact unit using pattern-by-fill technique - Google Patents
Electrically conductive contact unit producing method for memory module, involves utilizing two adjoining structures of semiconductor component for producing contact unit using pattern-by-fill technique Download PDFInfo
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- DE102007019761A1 DE102007019761A1 DE102007019761A DE102007019761A DE102007019761A1 DE 102007019761 A1 DE102007019761 A1 DE 102007019761A1 DE 102007019761 A DE102007019761 A DE 102007019761A DE 102007019761 A DE102007019761 A DE 102007019761A DE 102007019761 A1 DE102007019761 A1 DE 102007019761A1
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- structures
- contact element
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- gate stack
- memory chip
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000004065 semiconductor Substances 0.000 title claims abstract description 20
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- 239000010949 copper Substances 0.000 claims abstract description 4
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims abstract description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 4
- 239000010937 tungsten Substances 0.000 claims abstract description 4
- 239000010941 cobalt Substances 0.000 claims abstract description 3
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract 2
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract 2
- 239000011733 molybdenum Substances 0.000 claims abstract 2
- 125000006850 spacer group Chemical group 0.000 claims description 19
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 6
- 239000005380 borophosphosilicate glass Substances 0.000 claims description 5
- 238000005530 etching Methods 0.000 claims description 5
- 238000001459 lithography Methods 0.000 claims description 5
- 238000002513 implantation Methods 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 3
- 230000005693 optoelectronics Effects 0.000 claims description 3
- 229920005591 polysilicon Polymers 0.000 claims description 3
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 3
- 229910052581 Si3N4 Inorganic materials 0.000 claims 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims 1
- 239000000758 substrate Substances 0.000 description 15
- 230000008021 deposition Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001900 extreme ultraviolet lithography Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000000671 immersion lithography Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76897—Formation of self-aligned vias or contact plugs, i.e. involving a lithographically uncritical step
-
- 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
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/76802—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing by forming openings in dielectrics
- H01L21/76816—Aspects relating to the layout of the pattern or to the size of vias or trenches
-
- 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 potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/0203—Particular design considerations for integrated circuits
- H01L27/0207—Geometrical layout of the components, e.g. computer aided design; custom LSI, semi-custom LSI, standard cell technique
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B12/00—Dynamic random access memory [DRAM] devices
- H10B12/30—DRAM devices comprising one-transistor - one-capacitor [1T-1C] memory cells
- H10B12/48—Data lines or contacts therefor
- H10B12/485—Bit line contacts
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B41/00—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates
- H10B41/10—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by the top-view layout
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B41/00—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates
- H10B41/30—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates 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
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B12/00—Dynamic random access memory [DRAM] devices
- H10B12/30—DRAM devices comprising one-transistor - one-capacitor [1T-1C] memory cells
- H10B12/48—Data lines or contacts therefor
- H10B12/488—Word lines
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Electrodes Of Semiconductors (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
Abstract
Description
Verfahren zur Herstellung eines Kontaktelementes, eine Struktur in einem Halbleiterbauelement, eine integrierte Schaltung und ein Halbleiterbauelementmethod for producing a contact element, a structure in a semiconductor device, a integrated circuit and a semiconductor device
Bei der Herstellung von Halbleiterbauelementen, wie z. B. Speicherbausteinen, ist es fortlaufend erforderlich, kleinere Strukturen herzustellen, um eine höhere Integrationsdichte zu erreichen.at the production of semiconductor devices, such as. B. memory modules, It is constantly necessary to produce smaller structures to to achieve a higher integration density.
Eine Möglichkeit besteht darin, kürzere Wellenlängen, wie z. B. bei der EUV Lithographie zu verwenden. Bei einer anderen Möglichkeit, der Immersionslithographie, wird die Strukturgröße verkleinert, indem ein flüssiges Medium anstelle eines Luftspaltes zwischen Optik und der Oberfläche des Substrates (z. B. einem Siliziumwafer) angeordnet wird.A Possibility is shorter wavelengths, such as B. to use in the EUV lithography. With another Possibility of immersion lithography, becomes the structure size downsized by a liquid medium instead of a Air gap between optics and the surface of the substrate (eg, a silicon wafer).
Diese
Maßnahmen erfordern erhebliche Entwicklungskosten. Daher
besteht ein Anreiz, Verfahren und Strukturen zu entwickeln, bei
denen herkömmliche Technologien verwendet werden können und
trotzdem kleine Strukturen erzeugt werden können. Ein Beispiel
dafür ist die Line-by-Fill Technologie (siehe
Die Erfindung wird nachfolgend unter Bezugnahme auf die Figuren der Zeichnungen an mehreren Ausführungsbeispielen näher erläutert. Es zeigen:The Invention will be described below with reference to the figures of Drawings closer to several embodiments explained. Show it:
Im
Folgenden wird die Erfindung anhand einiger Ausführungsformen
dargestellt, dabei wird die Erfindung vor allem anhand einer Kontaktierung
zwischen zwei Ebenen eines Halbleiterbauelementes beschrieben, wobei
die Kontaktierung zwischen zwei Gate-Stackstrukturen
In
Auf
einem Substrat
Die
Gate-Stackstrukturen
Seitlich
neben den Gate-Stackstrukturen
Nach
der Durchführung der Pattern-by-Fill Technik befinden sich
auf dem Substrat
Der
Abstand zwischen den Strukturen
Der
Bereich zwischen den benachbarten Strukturen
Die
Auffüllung erfolgt selbstjustierend zwischen den beiden
Gate-Stackstrukturen
Dabei sehen Substratkontakte dieser Art die gleiche Umgebung und daher ist die sehr kritische Ätzung und die Abscheidung für alle Kontakte gleich, insbesondere auch im Fall der gleichzeitigen Öffnung der Arraykontakte CB. Bei dieser Ausführungsform kommen nur Kontakte vor, bei denen entweder ein benachbarter GC Stack aus einem ersten Pattern und der andere aus dem Füll Pattern entstanden ist, oder bei denen der Kontakt zwischen zwei ersten Strukturen liegt.there Substrate contacts of this type see the same environment and therefore is the very critical etching and deposition for all contacts the same, especially in the case of simultaneous opening of the Array contacts CB. In this embodiment come only Contacts in which either an adjacent GC stack from a first pattern and the other from the filling pattern is, or where the contact between two first structures lies.
Zusätzlich
ist es möglich, dass vor der Auffüllung mit dem
Kontaktelement
Auch
ist es möglich, dass vor der Auffüllung mit dem
Kontaktelement
Im
Weiteren können eine oder beide der benachbarten Strukturen
(z. B. GC-Stacks)
Die Dummy-Struktur kann sich aus der Notwendigkeit der Erzeugung von ersten Strukturen und der durch Pattern-by-Fill bedingten Erzeugung von Fill-Strukturen ergeben, die elektrisch oft keine Funktion ausüben, oder durch absichtlich platzierte erste Strukturen, so dass ein Abstand zwischen 1. Strukturen und Füllstrukturen an einer Stelle entsteht wo ein Substratkontakt platziert werden soll.The Dummy structure may arise from the need of generating first structures and pattern-by-fill generation of fill structures that often have no electrical function, or by intentionally placed first structures, so that one Distance between 1. Structures and filling structures at one Place arises where a substrate contact is to be placed.
In
der ersten Ausführungsform werden GC-Stacks
In
der ersten Ausführungsform ist das Kontaktelement
In
einer zweiten alternativen Ausführungsform, ist das Kontaktelement
Dies
ist in
In
Anschließend
erfolgt die Auffüllung mit dem elektrisch leitfähigen
Material zur Bildung des Kontaktelementes
In
In
Ausgangspunkt
sind in
Auf
beiden Strukturen
Nach
der Entfernung der horizontalen Teile der Spacerschicht
Wenn
anschließend eine Planarisierung mit CMP oder eine Rückätzung
durchgeführt wird, liegen die ersten Strukturen
In
Im
Bereich, der mit einem Y gekennzeichnet ist, besteht nun die Aufgabe,
durch je einen schmalen Spalt hindurch je eine separate Kontaktierung
zu Anschlüssen in einer darunter liegenden Ebene durchzuführen.
In dem mit X gekenzeichneten Kontakt kann auch durch zwei eng benachbarte
Spalte je ein gemeinsamer Kontakt zum gleichen Gebiet hergestellt
werden Grundsätzlich ist es mit den Ausführungsformen
der vorliegenden Erfindung möglich, die Möglichkeiten
der Pattern-by-Fill Technik (d. h. Herstellung von Strukturen mit
sehr kleinen Abständen zwischen den Strukturen) mit einer
selbstjustierenden Kontaktierung zu verbinden. Die Zwischenräume zwischen
den benachbarten Strukturen
Insbesondere
werden dort, wo die Fläche zwischen zwei funktionalen Hauptstrukturen
durch eine Fill-Struktur oder eine Carrier-Struktur geschlossen
ist, Zwischenräume erzeugt. In
Eine Implantation erfolgt, soweit notwendig, durch diese Zwischenräume entweder vor Abscheidung eines Dielektrikums (BPSG-Schicht) oder nach Ätzung eines Lochs im BPSG, oder nach einer Spacerätzung im Loch.A Implantation takes place, as far as necessary, through these intermediate spaces either before deposition of a dielectric (BPSG layer) or after etching a hole in the BPSG, or after a spacer etch in the hole.
Alternativ oder an einigen Stellen ergänzend erfolgt der Substrat-Kontakt auf Diffusionsgebiet (CD-Kontakte) durch das GC-Gebiet in isolierender Weise und die Implantation erfolgt gegebenenfalls durch das geätzte Kontaktloch. D. h. es wird durch den GC-Stack geätzt (bzw. es wird zwischen den GC-Strukturen durch die BPSG Schicht geätzt) und dann erfolgt gegebenenfalls die Implantation, wobei dann ein die Außenwand isolierender Kontaktlochspacer erzeugt wird und dann aufgefüllt wird. Alternativ kann auch nach der Spacerätzung implantiert werden. Um die GC-Stackätzung nur auf die CD-Kontakte zu begrenzen wird eine relativ kostengünstige Lithographie mit der Vorvorgänger-Gerätegeneration durchgeführt.alternative or in some places supplementary substrate contact on diffusion area (CD contacts) through the GC area in an insulating manner and the implantation is optionally performed by the etched Contact hole. Ie. it is etched by the GC stack (resp. it is etched between the GC structures by the BPSG layer) and then optionally carried out the implantation, in which case a the outer wall of insulating Kontaktlochspacer is generated and then replenished. Alternatively, even after the Spacerätzung be implanted. To the GC stack etching limiting only to the CD contacts will be a relatively inexpensive Lithography with the predecessor device generation carried out.
Mit den Ausführungsformen der vorliegenden Erfindung ist die Kontaktierung sublithographischer Strukturen möglich, wobei ein kritischer Lithographieschritt, z. B. die Entfernung von Füllstrukturen eingespart wird.With the embodiments of the present invention is the Contacting sublithographic structures possible, where a critical lithography step, e.g. B. saves the removal of filling structures becomes.
Die Erfindung beschränkt sich in ihrer Ausführung nicht auf die vorstehend angegebenen bevorzugten Ausführungsbeispiele. Vielmehr ist eine Anzahl von Varianten denkbar, die von dem erfindungsgemäßen Verfahren und der erfindungsgemäßen Struktur auch bei grundsätzlich anders gearteten Ausführungen Gebrauch machen.The Invention is limited in its execution not to the preferred embodiments given above. Rather, a number of variants are conceivable that of the invention Method and structure of the invention also in fundamentally different types Make use.
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - US 20060024621 A1 [0004] US 20060024621 A1 [0004]
Claims (27)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007019761A DE102007019761A1 (en) | 2007-04-19 | 2007-04-19 | Electrically conductive contact unit producing method for memory module, involves utilizing two adjoining structures of semiconductor component for producing contact unit using pattern-by-fill technique |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007019761A DE102007019761A1 (en) | 2007-04-19 | 2007-04-19 | Electrically conductive contact unit producing method for memory module, involves utilizing two adjoining structures of semiconductor component for producing contact unit using pattern-by-fill technique |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102007019761A1 true DE102007019761A1 (en) | 2008-10-23 |
Family
ID=39768023
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE102007019761A Ceased DE102007019761A1 (en) | 2007-04-19 | 2007-04-19 | Electrically conductive contact unit producing method for memory module, involves utilizing two adjoining structures of semiconductor component for producing contact unit using pattern-by-fill technique |
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Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5017515A (en) * | 1989-10-02 | 1991-05-21 | Texas Instruments Incorporated | Process for minimizing lateral distance between elements in an integrated circuit by using sidewall spacers |
US5429988A (en) * | 1994-06-13 | 1995-07-04 | United Microelectronics Corporation | Process for producing high density conductive lines |
WO1997010612A1 (en) * | 1995-09-14 | 1997-03-20 | Advanced Micro Devices, Inc. | Damascene process for reduced feature size |
US6420104B1 (en) * | 1999-11-01 | 2002-07-16 | Advanced Micro Devices, Inc. | Method of reducing contact size by spacer filling |
DE10228807A1 (en) * | 2002-06-27 | 2004-01-15 | Advanced Micro Devices, Inc., Sunnyvale | Methods for defining the dimension of circuit elements using separation element deposition techniques |
US20060024621A1 (en) | 2004-07-17 | 2006-02-02 | Infineon Technologies Ag | Method of producing a structure on the surface of a substrate |
US20060216938A1 (en) * | 2005-03-16 | 2006-09-28 | Osamu Miyagawa | Method of forming pattern |
-
2007
- 2007-04-19 DE DE102007019761A patent/DE102007019761A1/en not_active Ceased
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5017515A (en) * | 1989-10-02 | 1991-05-21 | Texas Instruments Incorporated | Process for minimizing lateral distance between elements in an integrated circuit by using sidewall spacers |
US5429988A (en) * | 1994-06-13 | 1995-07-04 | United Microelectronics Corporation | Process for producing high density conductive lines |
WO1997010612A1 (en) * | 1995-09-14 | 1997-03-20 | Advanced Micro Devices, Inc. | Damascene process for reduced feature size |
US6420104B1 (en) * | 1999-11-01 | 2002-07-16 | Advanced Micro Devices, Inc. | Method of reducing contact size by spacer filling |
DE10228807A1 (en) * | 2002-06-27 | 2004-01-15 | Advanced Micro Devices, Inc., Sunnyvale | Methods for defining the dimension of circuit elements using separation element deposition techniques |
US20060024621A1 (en) | 2004-07-17 | 2006-02-02 | Infineon Technologies Ag | Method of producing a structure on the surface of a substrate |
US20060216938A1 (en) * | 2005-03-16 | 2006-09-28 | Osamu Miyagawa | Method of forming pattern |
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