WO2002045165A2 - Dicht gepackte halbleiterstruktur und verfahren zum herstellen einer solchen - Google Patents
Dicht gepackte halbleiterstruktur und verfahren zum herstellen einer solchen Download PDFInfo
- Publication number
- WO2002045165A2 WO2002045165A2 PCT/EP2001/013900 EP0113900W WO0245165A2 WO 2002045165 A2 WO2002045165 A2 WO 2002045165A2 EP 0113900 W EP0113900 W EP 0113900W WO 0245165 A2 WO0245165 A2 WO 0245165A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- insulator layer
- insulator
- semiconductor structure
- conductor tracks
- metallic conductor
- Prior art date
Links
- 239000004065 semiconductor Substances 0.000 title claims abstract description 56
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000004020 conductor Substances 0.000 claims abstract description 39
- 239000000758 substrate Substances 0.000 claims abstract description 11
- 239000012212 insulator Substances 0.000 claims description 111
- 239000000463 material Substances 0.000 claims description 43
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 238000005530 etching Methods 0.000 claims description 10
- 238000001465 metallisation Methods 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 3
- 238000005229 chemical vapour deposition Methods 0.000 claims 1
- 230000008878 coupling Effects 0.000 abstract description 9
- 238000010168 coupling process Methods 0.000 abstract description 9
- 238000005859 coupling reaction Methods 0.000 abstract description 9
- 238000009413 insulation Methods 0.000 abstract 8
- 239000012774 insulation material Substances 0.000 abstract 4
- 238000000151 deposition Methods 0.000 description 3
- 238000005496 tempering Methods 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 230000001808 coupling effect Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/52—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames
- H01L23/522—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
- H01L23/532—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body characterised by the materials
- H01L23/5329—Insulating materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/52—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames
- H01L23/522—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
- H01L23/5222—Capacitive arrangements or effects of, or between wiring layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
Definitions
- the invention relates to a tightly packed semiconductor structure and a method for producing such a semiconductor structure.
- the invention relates to a semiconductor structure with an insulator layer on a semiconductor substrate and at least two metallic conductor tracks in the insulator layer.
- the method for producing such a semiconductor structure using the “damascene technique” comprises the steps: generating an insulator layer from a first insulator material on a semiconductor substrate, defining regions in the insulator layer from the first insulator material in which trenches are produced, etching of trenches in the insulator layer from the first insulator material, producing at least two metallic interconnects by metallizing the insulator layer from the first insulator material so that the trenches are filled with metal, and polishing the semiconductor structure so that the metallization on the surface of the insulator layer from the first insulator material Will get removed.
- the object of the invention is to reduce the capacitive coupling between adjacent metallic conductor tracks of a semiconductor structure and thus to enable the production of a more densely packed semiconductor structure.
- tempering for example after implantation (implant annealing), takes place at 960 ° C, tempering after, for example, metallization takes place at 800 ° C.
- the semiconductor structure according to the invention is characterized in that the insulator layer comprises a first insulator layer of a predetermined thickness made of a first insulator material and a second insulator layer of a predetermined thickness made of a second insulator material, which is arranged above the first insulator layer, the at least two metallic conductor tracks being made of the first insulator layer extend out into the second insulator layer, and the second insulator material has a lower relative dielectric constant than the first insulator material.
- the method for producing such a semiconductor structure comprises etching back the first insulator layer between the conductor tracks, so that the at least two metallic conductor tracks protrude beyond adjacent regions of the first insulator layer, and producing a second insulator layer from a second insulator material on the semiconductor structure, so that the at least two metallic conductor tracks extend out of the first insulator layer into the second insulator layer, the second insulator material having a lower relative dielectric constant than the first insulator material.
- the lower insulator layer consists of SiO 2 with a relative dielectric constant of 3.9, the relative dielectric constant of the upper insulator layer is in particular less than 3.9.
- One advantage of the invention is that only one (etching) step that is easy to control has to be carried out in addition, but the rest of the method is not significantly more complex than the prior art method. Further features and advantages of the invention will become apparent from the following description of a preferred embodiment, reference being made to the accompanying drawings.
- 1A to F each show schematically the cross section through a semiconductor structure in the individual steps of contacting or in the production of conductor tracks using the "damascene technique".
- FIGS. 2A and B each show schematically the cross section through a semiconductor structure with two metallic conductor tracks according to the prior art.
- 3A to C each show schematically the cross section through a semiconductor structure according to the invention with two metallic conductor tracks.
- Metallic conductor tracks of an integrated circuit are preferably produced by means of a ascene process.
- the intermetallic dielectric IMD
- the IMD is first applied, and then trenches are etched into the IMD.
- the IMD is preferably obtained by suitable CVD deposition.
- the trenches are filled with metal by depositing the metal over the entire surface of the semiconductor substrate and then removing it again from the raised regions of the IMD using CMP or etching back.
- 1A to F the individual steps of a typical dual damascene method are shown schematically.
- 1A shows an insulator layer 1 (gray area) in which an (contact) opening 2 is provided for a connection to the semiconductor (not shown) located underneath.
- the semiconductor structure is annealed by supplying heat 3 (FIG. IB). This "anneling step” takes place at a temperature of 800 to 960 ° C.
- a mask 4 is placed on the half lithographically generated ladder structure, with which the areas are defined in which trenches or further openings are etched (MO lithography step in FIG. IC). After the etching, the trenches 5 or widened openings 2 shown in FIG. 1D are obtained within the mask window 4.
- the mask 4 is then removed and the semiconductor structure is metallized, ie completely covered with metal (tungsten). However, only the metal in the trench 5 or in the contact windows 2 is required. The excess metal is removed again by chemical mechanical polishing (CMP), so that finally the semiconductor structure with two metallic conductor tracks 7 and 8 according to FIG. 1F results.
- CMP chemical mechanical polishing
- a first insulator layer 1 was produced from a first insulator material on a semiconductor substrate (not shown), windows were defined in the first insulator layer 1, in which trenches 5 are produced, the trenches 5 were etched in the first insulator layer 1, and they were two metallic interconnects 7 and 8 are created in the trench 5 by metallizing the semiconductor structure so that the trenches 5 in the first insulator layer 1 are filled with metal 6, and the semiconductor structure has been polished so that the metallization 6 on the surface of the first Insulator layer 1 is removed and the metal 6 remains essentially only in the trench 5.
- the resulting semiconductor structure comprises an insulator layer 1 on a (not shown) semiconductor substrate and at least two metallic conductor tracks 7 and 8 in the insulator layer 1.
- FIG. 2B shows the semiconductor structure after the deposition of a covering second layer of the first insulator material 9, the first and the second layer of the first insulator material being illustrated by a dashed line are separated.
- the lower insulator layer 1 and the upper insulator layer 9 are generally essentially homogeneous.
- the mutual capacitive coupling is indicated by a double arrow between the upper edges of the two conductor tracks 7 and 8. This coupling prevents denser packing of the conductor tracks 7 and 8, since below a certain spacing of the conductor tracks it leads to interference in the signals on one or both of the conductor tracks.
- the first insulator layer 1 is selectively etched back, i.e. the insulator layer 1 is only removed between the trenches 5, the metallic conductor tracks 7 and 8 are not significantly affected by the etching.
- a second insulator layer 10 is produced from a second insulator material on the semiconductor structure.
- the at least two metallic conductor tracks 7 and 8 are embedded in their upper part in the second insulator layer 10 made of the second insulator material.
- the conductor tracks in the first insulator layer 1 extend out of the first insulator layer 1 into the second insulator layer 10.
- the second insulator layer 10 is shown hatched in FIG. 3C.
- a material is selected as the second insulator material which has a lower relative dielectric has constant as the first insulator material.
- the second insulator material which has a lower relative dielectric has constant as the first insulator material.
- 3C like the semiconductor structure according to FIG. 2B, comprises a first insulator layer on a (not shown) semiconductor substrate and at least two metallic conductor tracks 1, 8 in the insulator layer.
- a second insulator layer 10 (hatched area) of a predetermined thickness is arranged over the first insulator layer 1.
- the first insulator layer 1 (gray area) of a predetermined thickness is made of a first insulator material
- the second insulator layer 10 consists of a second insulator material which has a lower relative dielectric constant than the first insulator material, namely, preferably a relative dielectric constant that is less than 3.
- the two metallic conductor tracks 7 and 8 extend from the first insulator layer 1 into the second insulator layer 10.
- Another property of the second insulator material in addition to that after a low relative dielectric constant must be that cavities or voids in the inter-dielectric layer, e.g. as a result of overhanging metal 1 flanks can be avoided when producing the second insulator layer 10.
- fill (gap fill) materials are available which are currently being developed (in particular for embedded DRAM elements), with which even the smallest voids can be filled very well.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2003-7007108A KR100533401B1 (ko) | 2000-11-28 | 2001-11-28 | 반도체 구조체 상의 상호 접속부들간에 용량성 결합을 감소시키기 위한 반도체 제조 방법 |
JP2002547229A JP2004515079A (ja) | 2000-11-28 | 2001-11-28 | 小型の半導体構造およびその製造方法 |
EP01999003A EP1340260A2 (de) | 2000-11-28 | 2001-11-28 | Dicht gepackte halbleiterstruktur und verfahren zum herstellen einer solchen |
US10/432,770 US6864170B2 (en) | 2000-11-28 | 2001-11-28 | Compact semiconductor structure |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10059935A DE10059935A1 (de) | 2000-11-28 | 2000-11-28 | Dicht gepackte Halbleiterstruktur und Verfahren zum Herstellen einer solchen |
DE10059935.4 | 2000-11-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002045165A2 true WO2002045165A2 (de) | 2002-06-06 |
WO2002045165A3 WO2002045165A3 (de) | 2002-11-21 |
Family
ID=7665549
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2001/013900 WO2002045165A2 (de) | 2000-11-28 | 2001-11-28 | Dicht gepackte halbleiterstruktur und verfahren zum herstellen einer solchen |
Country Status (6)
Country | Link |
---|---|
US (1) | US6864170B2 (de) |
EP (1) | EP1340260A2 (de) |
JP (1) | JP2004515079A (de) |
KR (1) | KR100533401B1 (de) |
DE (1) | DE10059935A1 (de) |
WO (1) | WO2002045165A2 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090323300A1 (en) * | 2006-04-25 | 2009-12-31 | Daisuke Fujimoto | Conductor Foil with Adhesive Layer, Conductor-Clad Laminate, Printed Wiring Board and Multilayer Wiring Board |
KR101106318B1 (ko) * | 2008-12-03 | 2012-01-18 | 전주대학교 산학협력단 | 한지난석 제조 방법 및 장치 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4319070A1 (de) * | 1992-06-24 | 1994-01-05 | Mitsubishi Electric Corp | Halbleitervorrichtung und Herstellungsverfahren dafür |
EP0687004A1 (de) * | 1994-06-07 | 1995-12-13 | Texas Instruments Incorporated | Verfahren zur Herstellung von Dielektrica auf Halbleiterbauelemente |
EP0759635A2 (de) * | 1995-08-23 | 1997-02-26 | International Business Machines Corporation | Planare Endpassivierung für Halbleiterbauelemente |
US5747880A (en) * | 1994-05-20 | 1998-05-05 | Texas Instruments Incorporated | Interconnect structure with an integrated low density dielectric |
US6066577A (en) * | 1996-11-08 | 2000-05-23 | International Business Machines Corporation | Method for providing fluorine barrier layer between conductor and insulator for degradation prevention |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR950034755A (de) * | 1994-05-27 | 1995-12-28 | ||
US5760480A (en) * | 1995-09-20 | 1998-06-02 | Advanced Micro Devics, Inc. | Low RC interconnection |
KR0179792B1 (ko) * | 1995-12-27 | 1999-04-15 | 문정환 | 고밀도 플라즈마 식각장비를 이용한 슬로프 콘택 홀 형성방법 |
JP2910713B2 (ja) * | 1996-12-25 | 1999-06-23 | 日本電気株式会社 | 半導体装置の製造方法 |
JP3218210B2 (ja) * | 1997-11-06 | 2001-10-15 | 聯華電子股▲分▼有限公司 | ランドレスバイアホールとガス誘電体を備えた多層間接続構造の形成方法 |
JPH11354638A (ja) * | 1998-06-12 | 1999-12-24 | Fujitsu Ltd | 配線形成方法及び配線構造 |
US6306754B1 (en) * | 1999-06-29 | 2001-10-23 | Micron Technology, Inc. | Method for forming wiring with extremely low parasitic capacitance |
JP3488146B2 (ja) * | 1999-08-31 | 2004-01-19 | 富士通株式会社 | 半導体装置及びその製造方法 |
KR100382738B1 (ko) * | 2001-04-09 | 2003-05-09 | 삼성전자주식회사 | 반도체 소자의 메탈 컨택 형성 방법 |
-
2000
- 2000-11-28 DE DE10059935A patent/DE10059935A1/de not_active Withdrawn
-
2001
- 2001-11-28 WO PCT/EP2001/013900 patent/WO2002045165A2/de active IP Right Grant
- 2001-11-28 JP JP2002547229A patent/JP2004515079A/ja active Pending
- 2001-11-28 KR KR10-2003-7007108A patent/KR100533401B1/ko not_active IP Right Cessation
- 2001-11-28 EP EP01999003A patent/EP1340260A2/de not_active Withdrawn
- 2001-11-28 US US10/432,770 patent/US6864170B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4319070A1 (de) * | 1992-06-24 | 1994-01-05 | Mitsubishi Electric Corp | Halbleitervorrichtung und Herstellungsverfahren dafür |
US5747880A (en) * | 1994-05-20 | 1998-05-05 | Texas Instruments Incorporated | Interconnect structure with an integrated low density dielectric |
EP0687004A1 (de) * | 1994-06-07 | 1995-12-13 | Texas Instruments Incorporated | Verfahren zur Herstellung von Dielektrica auf Halbleiterbauelemente |
EP0759635A2 (de) * | 1995-08-23 | 1997-02-26 | International Business Machines Corporation | Planare Endpassivierung für Halbleiterbauelemente |
US6066577A (en) * | 1996-11-08 | 2000-05-23 | International Business Machines Corporation | Method for providing fluorine barrier layer between conductor and insulator for degradation prevention |
Non-Patent Citations (3)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 11, 30. September 1999 (1999-09-30) -& JP 11 163523 A (UNITED MICROELECTRON CORP), 18. Juni 1999 (1999-06-18) * |
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 03, 30. März 2000 (2000-03-30) -& JP 11 354638 A (FUJITSU LTD), 24. Dezember 1999 (1999-12-24) * |
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 20, 10. Juli 2001 (2001-07-10) -& JP 2001 068548 A (FUJITSU LTD), 16. März 2001 (2001-03-16) * |
Also Published As
Publication number | Publication date |
---|---|
EP1340260A2 (de) | 2003-09-03 |
WO2002045165A3 (de) | 2002-11-21 |
DE10059935A1 (de) | 2002-06-06 |
KR20030059279A (ko) | 2003-07-07 |
KR100533401B1 (ko) | 2005-12-02 |
JP2004515079A (ja) | 2004-05-20 |
US20040029374A1 (en) | 2004-02-12 |
US6864170B2 (en) | 2005-03-08 |
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