JP2007134706A - 薄膜トランジスタ用シングルチャンバcvdプロセス - Google Patents
薄膜トランジスタ用シングルチャンバcvdプロセス Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 230000008569 process Effects 0.000 title description 20
- 239000010409 thin film Substances 0.000 title description 14
- 229910021417 amorphous silicon Inorganic materials 0.000 claims abstract description 75
- 238000000151 deposition Methods 0.000 claims abstract description 56
- 239000000758 substrate Substances 0.000 claims abstract description 55
- 230000008021 deposition Effects 0.000 claims abstract description 35
- 239000002019 doping agent Substances 0.000 claims abstract description 16
- 238000005229 chemical vapour deposition Methods 0.000 claims description 28
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 21
- 229910052710 silicon Inorganic materials 0.000 claims description 21
- 239000010703 silicon Substances 0.000 claims description 21
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 8
- 229910052698 phosphorus Inorganic materials 0.000 claims description 8
- 239000011574 phosphorus Substances 0.000 claims description 8
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 4
- 229910052787 antimony Inorganic materials 0.000 claims description 4
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims description 4
- 229910052785 arsenic Inorganic materials 0.000 claims description 4
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims description 4
- 229910052796 boron Inorganic materials 0.000 claims description 4
- 238000005137 deposition process Methods 0.000 abstract description 16
- 239000011810 insulating material Substances 0.000 abstract description 12
- 238000011109 contamination Methods 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 22
- 229910052581 Si3N4 Inorganic materials 0.000 description 13
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 13
- 239000010408 film Substances 0.000 description 12
- 239000004973 liquid crystal related substance Substances 0.000 description 9
- 239000011521 glass Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 239000000376 reactant Substances 0.000 description 8
- 238000012546 transfer Methods 0.000 description 8
- 210000002858 crystal cell Anatomy 0.000 description 7
- 238000004140 cleaning Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000011065 in-situ storage Methods 0.000 description 4
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 4
- 229910052814 silicon oxide Inorganic materials 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000003989 dielectric material Substances 0.000 description 3
- 238000002161 passivation Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000012776 electronic material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- NXDMHKQJWIMEEE-UHFFFAOYSA-N 4-(4-aminophenoxy)aniline;furo[3,4-f][2]benzofuran-1,3,5,7-tetrone Chemical compound C1=CC(N)=CC=C1OC1=CC=C(N)C=C1.C1=C2C(=O)OC(=O)C2=CC2=C1C(=O)OC2=O NXDMHKQJWIMEEE-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 229920000292 Polyquinoline Polymers 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 235000011194 food seasoning agent Nutrition 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- -1 that is Substances 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
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- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66742—Thin film unipolar transistors
- H01L29/6675—Amorphous silicon or polysilicon transistors
- H01L29/66765—Lateral single gate single channel transistors with inverted structure, i.e. the channel layer is formed after the gate
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/4401—Means for minimising impurities, e.g. dust, moisture or residual gas, in the reaction chamber
- C23C16/4404—Coatings or surface treatment on the inside of the reaction chamber or on parts thereof
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
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- H01L21/02436—Intermediate layers between substrates and deposited layers
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- H01L21/0245—Silicon, silicon germanium, germanium
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Abstract
【解決手段】真性アモルファスシリコン層の堆積に先立ち、誘電絶縁材料の層を堆積する第1の堆積操作により、同じCVDチャンバ内で基板上に連続して堆積することにより行われる。TFT基板上に堆積された絶縁材料は、その前に行われた基板への堆積プロセスによってチャンバ壁面に残留した残留ドーパントを覆うに充分な残留絶縁材料をチャンバ壁面に被覆させるような厚さをもつべきである。このことにより、同じCVDチャンバ内で基板上に真性アモルファスシリコン層を堆積させる次の堆積プロセスに対してクリーンな環境を与える。
【選択図】なし
Description
本発明は、化学気相堆積(CVD)チャンバ内に配置された基板上に、真性の(intrinsic) アモルファスシリコン層及び少なくともドーパントを1種ドープしたアモルファスシリコン層を連続的に堆積する改良方法に関する。特に、本発明は、真性の(intrinsic)アモルファスシリコン層及び少なくともドーパントを1種ドープしたアモルファスシリコン層を、同じCVDチャンバ内の薄膜トランジスタ(thin filmtransistor :TFT)基板上に堆積し、係る真性のアモルファスシリコン層を係るドーパントにより汚染しない改良方法に関する。
プラズマ励起化学気相堆積法(PECVD)は、種々の基板に電子材料の層を堆積することによる半導体デバイスの製造に広く用いられる方法である。PECVDプロセスでは、2枚一組の平行板電極を備えた真空堆積チャンバの中に基板が配置される。通常、基板は下側の電極でもあるサセプタ上に配置される。堆積チャンバ内には、上側の電極でもあるガス流入マニホールドを介して反応体ガス(reactant gas)が流入される。2枚の電極間には、高周波(RF)電圧が印加されるが、これら電極は、反応体ガスにプラズマを発生させるに充分なRF出力を発生させる。プラズマは、反応体ガスを分解して、基板体の表面上に所望の物質の層を堆積させる。この第1の層の上に別の電子材料の別の層を堆積するには、堆積しようとする別の層の物質を含んだ反応体ガスを堆積チャンバに流入させればよい。各反応体ガスはプラズマに暴露されて、所望の材料の層を堆積させる。
真性アモルファスシリコン層とドープアモルファスシリコン層とを単一のCVDチャンバのみで堆積すれば、ドーパントガスや微粒子、即ち、リン、アンチモン、ヒ素やホウ素の微粒子がチャンバ内に残されてチャンバ壁を覆った場合にこれらは汚染物になる。次のTFT基板の堆積プロセスが行われた時に、チャンバ壁に残された残留ドーパントは不純物として真性アモルファスシリコン層を汚染する。このような汚染により、薄膜トランジスタデバイスに欠陥が生じ使用できなくなる。
本発明に従えば、真性アモルファスシリコン層の汚染の問題を生じずに、同じCVDチャンバ内で、真性アモルファスシリコン層とドープアモルファスシリコン層とは連続して基板上へ堆積される。
本発明は、チャンバ壁面の残留ドーパントによる真性アモルファスシリコン層の汚染の問題を生じずに、同じCVDチャンバ内で、真性アモルファスシリコン層とドープアモルファスシリコン層とを連続して基板上へ堆積する改良方法を開示する。
以上説明したように、本発明のシングルチャンバCVDプロセスは、真性アモルファスシリコン層の汚染の問題を生じずに、同じCVDチャンバ内で、真性アモルファスシリコン層とドープアモルファスシリコン層とを連続して基板上へ堆積する改良方法を提供する。
Claims (18)
- 堆積方法であって:
化学気相堆積チャンバ内の基板上に真性シリコン層を堆積するステップと;
同一の化学気相堆積チャンバ内で、前記真性シリコン層上にドープシリコンを堆積するステップと;
を備える、前記方法。 - 前記ドープシリコンは、リン、アンチモン、ヒ素、ホウ素から成る群から選択されるドーパントでドープされる、請求項1に記載の方法。
- 前記真性シリコンは、真性アモルファスシリコンを備え、前記ドープシリコンは、ドープアモルファスシリコンを備える、請求項1に記載の方法。
- 前記チャンバの圧力は、約1.2から約1.5トールである、請求項1に記載の方法。
- 前記基板は、前記堆積中、約0.5インチから約2インチの距離だけ、電極から離間されている、請求項1に記載の方法。
- 前記真性シリコンは、約200nmから約400nmの厚みまで堆積される、請求項1に記載の方法。
- 前記ドープシリコンは、約40nmから60nmの厚みまで堆積される、請求項1に記載の方法。
- 前記ドープシリコンを堆積するステップは、ガス入口マニホールドに印加される300ワットのRF電力を提供する工程を備える、請求項1に記載の方法。
- H2とSiH4を前記チャンバに提供するステップを更に備え、前記SiH4に対するH2の比は、3を超える、請求項1に記載の方法。
- 堆積方法であって:
化学気相堆積チャンバ内の基板上に真性シリコン層を堆積するステップと;
同一の化学気相堆積チャンバ内で、前記真性シリコン層上にドープシリコンを堆積するステップとであって、前記ドープシリコンの堆積は、前記真性シリコンの堆積の直後に起こる、前記ステップと;
を備える、前記方法。 - 前記ドープシリコンは、リン、アンチモン、ヒ素、ホウ素から成る群から選択されるドーパントでドープされる、請求項10に記載の方法。
- 前記真性シリコンは、真性アモルファスシリコンを備え、前記ドープシリコンは、ドープアモルファスシリコンを備える、請求項10に記載の方法。
- 前記チャンバの圧力は、約1.2から約1.5トールである、請求項10に記載の方法。
- 前記基板は、前記堆積中、約0.5インチから約2インチの距離だけ、電極から離間されている、請求項10に記載の方法。
- 前記真性シリコンは、約200nmから約400nmの厚みまで堆積される、請求項10に記載の方法。
- 前記ドープシリコンは、約40nmから60nmの厚みまで堆積される、請求項10に記載の方法。
- 前記ドープシリコンを堆積するステップは、ガス入口マニホールドに印加される300ワットのRF電力を提供する工程を備える、請求項10に記載の方法。
- H2とSiH4を前記チャンバに提供するステップを更に備え、前記SiH4に対するH2の比は、3を超える、請求項10に記載の方法。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US17410393A | 1993-12-28 | 1993-12-28 |
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JP11018760A Division JPH11265855A (ja) | 1993-12-28 | 1999-01-27 | 薄膜トランジスタ用シングルチャンバcvdプロセス |
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JP2007134706A true JP2007134706A (ja) | 2007-05-31 |
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---|---|---|---|
JP6327116A Expired - Lifetime JP2918792B2 (ja) | 1993-12-28 | 1994-12-28 | 薄膜トランジスタ用シングルチャンバcvdプロセス |
JP11018760A Pending JPH11265855A (ja) | 1993-12-28 | 1999-01-27 | 薄膜トランジスタ用シングルチャンバcvdプロセス |
JP2006300796A Pending JP2007134706A (ja) | 1993-12-28 | 2006-11-06 | 薄膜トランジスタ用シングルチャンバcvdプロセス |
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JP6327116A Expired - Lifetime JP2918792B2 (ja) | 1993-12-28 | 1994-12-28 | 薄膜トランジスタ用シングルチャンバcvdプロセス |
JP11018760A Pending JPH11265855A (ja) | 1993-12-28 | 1999-01-27 | 薄膜トランジスタ用シングルチャンバcvdプロセス |
Country Status (4)
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US (1) | US5589233A (ja) |
EP (1) | EP0661731B1 (ja) |
JP (3) | JP2918792B2 (ja) |
DE (1) | DE69424759T2 (ja) |
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Also Published As
Publication number | Publication date |
---|---|
EP0661731A3 (en) | 1995-11-15 |
EP0661731A2 (en) | 1995-07-05 |
DE69424759T2 (de) | 2001-02-08 |
DE69424759D1 (de) | 2000-07-06 |
JPH07326589A (ja) | 1995-12-12 |
EP0661731B1 (en) | 2000-05-31 |
JPH11265855A (ja) | 1999-09-28 |
US5589233A (en) | 1996-12-31 |
JP2918792B2 (ja) | 1999-07-12 |
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