WO1999017366A1 - Semiconductor component and method for the production thereof - Google Patents
Semiconductor component and method for the production thereof Download PDFInfo
- Publication number
- WO1999017366A1 WO1999017366A1 PCT/DE1998/002862 DE9802862W WO9917366A1 WO 1999017366 A1 WO1999017366 A1 WO 1999017366A1 DE 9802862 W DE9802862 W DE 9802862W WO 9917366 A1 WO9917366 A1 WO 9917366A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- polymer
- semiconductor component
- metal
- solution
- Prior art date
Links
Classifications
-
- 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
- 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
-
- 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
-
- 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
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/12—Passive devices, e.g. 2 terminal devices
- H01L2924/1204—Optical Diode
- H01L2924/12044—OLED
Definitions
- the present invention relates to a semiconductor component with an insulation layer which contains a polymer based on polybenzoxazole and a process for its production.
- an insulation layer is required.
- This insulation layer must have good electrical insulation properties, adhere well to the adjacent layers and be compatible with the subsequent processes.
- AlSi, AlSiCu or AlCu is sputtered, etched and annealed in subsequent processes for the production of the conductor tracks.
- Cl 2 , BC1 3 , SiCl 4 or HBr can be used as etching media.
- Annealing requires temperatures of around 450 ° C.
- the areas that are not to be etched are protected by a structured photoresist that is stripped (removed) after the etching process.
- barrier layers below and above the insulation layer, which are also sputtered and etched.
- An example of a schematic layer sequence can be configured as follows: Metal 3
- the insulator can planarize the surface.
- the resist that is applied to the insulation layer can be structured on a planarized surface with higher resolution, better dimensional accuracy and thus better process tolerances. This is particularly important.
- B. in the structuring of the contact holes their fineness and process tolerances clearly influence the achievable integration density or yield.
- the structures produced in the resist are then transferred into the insulation layer or into the layers below using conventional etching techniques.
- BPSG Borophosphosilicate glass
- BPSG Borophosphosilicate glass
- BPSG Borophosphosilicate glass
- BPSG is then coated with a photoresist and processed further as indicated above.
- a special complex system is necessary for the BPSG separation.
- the high temperature load when the BPSG flows over affects the yield of semiconductor components.
- complex and expensive photo techniques such as a multi-layer system, phase masks and DUV are required to produce the fine contact holes required for a high integration density.
- a reliable structuring of the overlying thin photoresist e.g. in the production of contact hole structures should be possible.
- the objects of the present invention are achieved by a semiconductor component according to claim 1 and a method for producing a semiconductor component according to claim 8.
- the subclaims relate to preferred embodiments of the semiconductor component according to the invention or of the method according to the invention.
- the semiconductor component according to the invention thus has a layer structure composed of a substrate, an insulation layer made of a polymer based on polybenzoxazole and at least one metal layer.
- the substrate in the semiconductor component according to the invention consists of a material which is usually used as a substrate in microelectronics.
- Organic as well as inorganic substrate materials can be used become.
- Materials such as Si, doped Si, BPSG, WSi x , poly-Si, TEOS and Si nitride can be mentioned as examples.
- front-end processing has been carried out on the surface of the substrate.
- the front-end processing encompasses the entire processing of the semiconductor element up to the creation of the first insulating layer (e.g. BPSG or polybenzoxazole) for overlying metallic conductor tracks.
- the first insulating layer e.g. BPSG or polybenzoxazole
- the insulation layer which is provided on the substrate or on the front-end machined substrate, contains a highly heat-resistant polymer based on polybenzoxazole.
- the polymer includes polymers containing benzoxazole units.
- the insulation layer is suitable as an interlayer dielectric (ILD), e.g. B. as an insulation layer between the substrate and metal.
- ILD inter-metal dielectric
- IMD inter-metal dielectric
- the insulation layer in the semiconductor component according to the invention has a thickness in the range from 0.3 to 20 ⁇ m, a range from 0.5 to 2 ⁇ m being preferred.
- the semiconductor component according to the invention can also have a photoresist layer.
- Suitable as photoresist material are silicon-containing or silylatable resists, which show high resolution and are very stable in oxygen plasma.
- Photoresist materials known from EP-A-0 388 484 or EP-A-0 394 740 are particularly suitable.
- Anhydride-based polymers are used, the resist structures using the CARL process (Chemical Amplifica- tion of resist lines).
- the layer thickness is at least preferably 0.2 to 0.5 ⁇ m.
- At least one metal layer is provided as a conductor track above the insulation layer in the semiconductor component according to the invention. At least one further metal layer is preferably present, in which case one of the aforementioned insulation layers made of the organic polymer is then applied again between the first and the second metal layer.
- the metal layer (s) is / are preferably selected from a metal alloy from the group AlSi, AlSiCu and AlCu. It can also be a metal layer made of a metal, e.g. B. copper may be provided.
- the semiconductor component according to the invention can be used in a variety of ways in microelectronics, it being preferably used as a chip.
- the method according to the invention for producing a semiconductor component comprises the following steps:
- a well planarizing, high-temperature stable, organic dielectric is used as the insulation layer.
- Suitable organic dielectrics are highly heat-resistant polymers based on polybenzoxazole.
- the polymer includes polymers containing benzoxazole units.
- the dielectric is applied to a substrate via soluble precursors or in soluble form.
- Polybenzoxazole precursors according to the descriptions from EP 23662, EP 264678, EP 25506, US Pat. No. 4,849,051 or US Pat. No. 5,376,499 are preferably used.
- the substrate can consist of an organic or inorganic material and is usually front-end machined on a surface.
- the solution from the polymer can be applied by conventional methods, the solution preferably being applied by centrifuging.
- the dielectric is then dried by annealing to form a film of the polymer. Annealing is carried out in a temperature range from 250 ° C. to 450 ° C., preferably in a range from 350 ° C. to 450 ° C.
- the organic polymer film should have a thickness in the range of 0.3 to 20 ⁇ m, with a range of 0.5 to 2 ⁇ m being preferred.
- a solution of a photoresist material is applied. Silicon-containing or silylatable photoresist materials are suitable which show high resolution and are very stable in oxygen plasma. Photoresist materials known from EP 388 484, 89P1309DE or EP 394 740 are particularly suitable.
- Anhydride-based polymers are preferably used which are used according to the CARL process for the production of resist structures.
- the solution can be applied by conventional methods, with the centrifugal technique being preferred.
- the applied photoresist material is then dried or preferably annealed to form a photoresist layer.
- the thickness of the photoresist layer should be in the range from 0.2 to 0.5 ⁇ m.
- the photo resist layer is made according to conventional
- the structuring is carried out by exposing the photoresist layer to light using a mask, z. B. the image of a contact hole mask with suitable contact hole sizes is used in the manufacture of a chip. The latent image in the photoresist layer is then developed using conventional methods to form a structured relief image.
- the silylation is also carried out according to conventional methods. For example, a solution of a siloxane in a suitable solvent can be used. The silylation is carried out within a period of time sufficient to increase the silicon content of the photoresist layer in the desired manner and to enlarge or reduce the structure on the photoresist layer (one Web structure is enlarged, a gap or contact hole structure is reduced). For a high etching selectivity, the silicon content in the silylated resist structures should be significantly above 15% by weight, preferably above 20% by weight.
- the structures or the relief image are transferred into the film from the polymer.
- the transfer is preferably carried out by reactive ion etching in oxygen plasma a (0RIE). If necessary, the photoresist layer is removed.
- the subsequent process steps e.g. B. the structure transfer into the lower layers or the application of the metal conductor tracks are carried out according to conventional methods.
- metal alloys such as AlSi, AlSiCu and AlCu can be sputtered on.
- metal conductor tracks e.g. B. copper can be provided.
- the upper silicon-containing resist layer is oxidized at 0 2 RIE. During the etching of the barrier layer
- the oxidized resist is also removed.
- the dielectric remains in the system as an insulator.
- a top resist consisting of an anhydride-containing polymer, a photoactive component and a solvent, for example methoxypropyl acetate (for example AZ CP-365-A from Hoechst) is at 1500-5000, preferably 2500 revolutions / 10-50 seconds, preferably 20 seconds spun on.
- the top resist is then dried on the hotplate at 70 to 140 ° C., preferably 100 ° C. for 20-120 seconds, preferably 60 seconds.
- the top resist structures are in an alkaline developer, e.g. B.
- AZ 726 MIF from Hoechst developed within 15 to 120 seconds, preferably 60 seconds, after which it is then rinsed with water and spun dry.
- the silylation of the top resist structures with a silylation solution, e.g. B. AZ CS-2,5-51 from Hoechst takes place within 15 to 120 seconds, preferably 60 seconds, after which it is then rinsed with isopropanol and spun dry. Further drying takes place on the hotplate at 70 to 140 ° C., preferably 100 ° C. in a period of 20 to 120 seconds, preferably 60 seconds.
- the temperature load when annealing the dielectric (max. 450 ° C) is at least 300 ° C lower than that of
- the method according to the invention is particularly suitable for the production of chips. Furthermore, this method can be used for the production of ILD layers and also for the production of IMD layers.
- the solution of a polybenzoxaxol precursor is spun onto a silicon wafer at 3000 rpm.
- the resulting ILD film is first dried on a hot plate at 120 ° C. for 120 s and then heated in an oven under nitrogen to 400 ° C. within 60 minutes, annealed at this temperature for 30 minutes and allowed to cool. sen.
- the thickness of the annealed polybenzoxazole film is 1.1 ⁇ m.
- a 0.27 ⁇ m thick layer of a photosensitive, anhydride-containing photoresist (AZ CP-365-A, Hoechst) is applied to the polybenzoxazole film by spinning on at 5000 rpm and then drying on a hotplate at 100 ° C./60 s.
- the image of a contact hole mask with contact hole sizes of 0.50 ⁇ m is exposed on this layer using an i-line exposure device and a dose of 200 mJ / cm 2 .
- the contact holes are obtained as a relief image.
- the diameter of the holes produced in this way in the 0.27 ⁇ m thick photoresist layer is 0.5 ⁇ m.
- silylation of the photoresist layer with a solution of 2.5% bisaminopropyl oligodimethylsiloxane in a mixture of 5 parts by weight of isopropanol and 1 part by weight of water (AZ CS-2.5-51, Hoechst) and a silylation time of 45 s the silicon content of the photoresist layer is increased to approx. 30% by weight and the contact hole diameter is reduced from 0.5 ⁇ m to 0.4 ⁇ m.
- the contact hole structures in the photoresist layer are made in a commercial plasma etching system (OMEGA 201, Trikon) by anisotropic etching with an oxygen plasma (40 cm 3 0 2 , 45 cm 3 S0 2 , 7 mTorr, 50 W platen-RF, 500 WICP-RF) transferred into the underlying polybenzoxazole film for 116 s.
- OEGA 201 commercial plasma etching system
- an oxygen plasma 40 cm 3 0 2 , 45 cm 3 S0 2 , 7 mTorr, 50 W platen-RF, 500 WICP-RF
- the diameter of the contact hole structures in the 1.1 ⁇ m thick polybenzoxazole layer is 0.4 ⁇ m.
- a titanium / titanium nitride layer is then sputtered on in a conventional manner.
- metal layers made of aluminum or titanium / titanium nitride can then be sputtered on, with a polybenzoxalzolfiIm in between in the manner described above is applied.
- the metal layer is structured using photoresist technology and etching.
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- 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)
- Formation Of Insulating Films (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98954227A EP1021832A1 (en) | 1997-09-29 | 1998-09-25 | Semiconductor component and method for the production thereof |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19742929 | 1997-09-29 | ||
DE19742929.7 | 1997-09-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999017366A1 true WO1999017366A1 (en) | 1999-04-08 |
Family
ID=7843976
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1998/002862 WO1999017366A1 (en) | 1997-09-29 | 1998-09-25 | Semiconductor component and method for the production thereof |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1021832A1 (en) |
WO (1) | WO1999017366A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN117866200A (en) * | 2023-12-18 | 2024-04-12 | 上海交通大学 | Polybenzoxazole precursor, process for producing the same, and photosensitive resin composition |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4965134A (en) * | 1987-05-18 | 1990-10-23 | Siemens Aktiengesellschaft | Method for manufacturing highly heat-resistant dielectrics |
JPH05102125A (en) * | 1991-10-08 | 1993-04-23 | Hitachi Chem Co Ltd | Semiconductor device, interlayer insulating film for semiconductor multilayer wiring and/or surface protective film composition |
US5356511A (en) * | 1992-07-21 | 1994-10-18 | Basf Aktiengesellschaft | Production of a polymer/metal or polymer/semiconductor composite |
US5556812A (en) * | 1994-06-27 | 1996-09-17 | Siemens Aktiengesellschaft | Connection and build-up technique for multichip modules |
-
1998
- 1998-09-25 EP EP98954227A patent/EP1021832A1/en not_active Withdrawn
- 1998-09-25 WO PCT/DE1998/002862 patent/WO1999017366A1/en not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4965134A (en) * | 1987-05-18 | 1990-10-23 | Siemens Aktiengesellschaft | Method for manufacturing highly heat-resistant dielectrics |
JPH05102125A (en) * | 1991-10-08 | 1993-04-23 | Hitachi Chem Co Ltd | Semiconductor device, interlayer insulating film for semiconductor multilayer wiring and/or surface protective film composition |
US5356511A (en) * | 1992-07-21 | 1994-10-18 | Basf Aktiengesellschaft | Production of a polymer/metal or polymer/semiconductor composite |
US5556812A (en) * | 1994-06-27 | 1996-09-17 | Siemens Aktiengesellschaft | Connection and build-up technique for multichip modules |
Non-Patent Citations (3)
Title |
---|
AHNE H ET AL: "Photopatternable insulating materials", SECOND INTERNATIONAL CONFERENCE ON PHOTO-EXCITED PROCESSES AND APPLICATIONS, JERUSALEM, ISRAEL, 17-21 SEPT. 1995, ISSN 0169-4332, APPLIED SURFACE SCIENCE, OCT. 1996, ELSEVIER, NETHERLANDS, PAGE(S) 311 - 315, XP002094368 * |
J. LABADIE AND J. HEDRICK: "RECENT ADVANCES IN HIGH TEMPERATURE POLYMERS FOR MICROELECTRONIC APPLOCATIONS", SAMPE JOURNAL, vol. 25, no. 4, August 1989 (1989-08-01), pages 18 - 22, XP002094367 * |
PATENT ABSTRACTS OF JAPAN vol. 017, no. 450 (E - 1416) 18 August 1993 (1993-08-18) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN117866200A (en) * | 2023-12-18 | 2024-04-12 | 上海交通大学 | Polybenzoxazole precursor, process for producing the same, and photosensitive resin composition |
Also Published As
Publication number | Publication date |
---|---|
EP1021832A1 (en) | 2000-07-26 |
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