JP4634923B2 - 絶縁膜の製造方法、トランジスタの製造方法及び電子デバイスの製造方法 - Google Patents
絶縁膜の製造方法、トランジスタの製造方法及び電子デバイスの製造方法 Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims description 41
- 239000011344 liquid material Substances 0.000 claims description 117
- 239000010408 film Substances 0.000 claims description 92
- 238000000034 method Methods 0.000 claims description 43
- 239000000758 substrate Substances 0.000 claims description 39
- 239000010409 thin film Substances 0.000 claims description 39
- 239000004065 semiconductor Substances 0.000 claims description 30
- 229920001709 polysilazane Polymers 0.000 claims description 19
- 229910052760 oxygen Inorganic materials 0.000 claims description 13
- 238000009832 plasma treatment Methods 0.000 claims description 12
- 229910052739 hydrogen Inorganic materials 0.000 claims description 8
- 239000003960 organic solvent Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 3
- 150000007824 aliphatic compounds Chemical class 0.000 claims description 2
- 150000001491 aromatic compounds Chemical class 0.000 claims description 2
- 238000000576 coating method Methods 0.000 description 16
- 239000004973 liquid crystal related substance Substances 0.000 description 14
- 239000007789 gas Substances 0.000 description 13
- 125000005647 linker group Chemical group 0.000 description 11
- 239000010410 layer Substances 0.000 description 8
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- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000002955 isolation Methods 0.000 description 6
- 229910007991 Si-N Inorganic materials 0.000 description 5
- 229910006294 Si—N Inorganic materials 0.000 description 5
- 238000002161 passivation Methods 0.000 description 5
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 4
- 238000005229 chemical vapour deposition Methods 0.000 description 4
- 238000005530 etching Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- 229910018557 Si O Inorganic materials 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 238000000206 photolithography Methods 0.000 description 3
- 238000005240 physical vapour deposition Methods 0.000 description 3
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000000059 patterning Methods 0.000 description 2
- 238000001020 plasma etching Methods 0.000 description 2
- 239000003870 refractory metal Substances 0.000 description 2
- 238000004528 spin coating Methods 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- DURPTKYDGMDSBL-UHFFFAOYSA-N 1-butoxybutane Chemical compound CCCCOCCCC DURPTKYDGMDSBL-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 229910003814 SiH2NH Inorganic materials 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000005380 borophosphosilicate glass Substances 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- QOSATHPSBFQAML-UHFFFAOYSA-N hydrogen peroxide;hydrate Chemical compound O.OO QOSATHPSBFQAML-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
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- H01L21/02337—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer post-treatment treatment by exposure to a gas or vapour
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- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
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Description
本発明の第1の実施の形態は、液晶表示デバイス(電子デバイス)の製造方法、特に液晶表示デバイスを構築する薄膜トランジスタ及びそのゲート絶縁膜の製造方法に本発明を適用した例を説明するものである。
液晶表示デバイスの製造方法は、まず最初に基板(第1の基板)1を準備する(図1参照。)。基板1には透明石英ガラス基板を使用することができる。
第1の実施の形態においては、第1の液体材料4Aを塗布した後に第1の液体材料4A中のSiの未結合手にH又はOを供給しつつ未結合手を減少して第1の液体材料4Bを形成し、この後に第1の液体材料4B上に第2の液体材料4Cを塗布し、第1の液体材料4B及び第2の液体材料4CからSi系絶縁膜を形成したので、第1の液体材料4Bを転換したSi系絶縁膜の膜質を向上することができる。従って、薄膜トランジスタにおいては、チャネル形成領域3Cとゲート絶縁膜4との間の界面状態を安定に保つことができ、電気的特性に優れた薄膜トランジスタの製造方法を提供することができる。
第2の実施の形態は、半導体装置(電子デバイス)の素子間に配設されるトレンチアイソレーションの製造方法に本発明を適用した例を説明するものである。
まず最初に、基板30を準備し、図13に示すように、基板30の表面部分であって素子間に相当する領域に、基板30表面から深さ方向に向かってトレンチ31を形成する。基板30には、第2の実施の形態において、Si単結晶基板が使用される。また、基板30にはSOI(silicon on insulator)基板、化合物半導体基板等の他の基板を使用してもよい。トレンチ31は、例えばフォトリソグラフィ技術により形成したマスクを使用し、RIE(reactive ion etching)等の異方性エッチングを行うことにより形成する。第2の実施の形態において、トレンチ31の開口寸法は例えば100nm×100nmに設定され、アスペクト比は4以上に設定されている。
第2の実施の形態においては、第1の液体材料34Aを塗布した後に第1の液体材料34A中のSiの未結合手にH又はOを供給しつつ未結合手を減少して第1の液体材料34Bを形成し、この後に第1の液体材料34B上に第2の液体材料34Cを塗布し、第1の液体材料34B及び第2の液体材料34CからSi系絶縁膜を形成したので、第1の液体材料34Bを転換したSi系絶縁膜の膜質を向上することができる。従って、リーク電流を減少することができ、絶縁耐圧を向上することができるトレンチアイソレーション(電子デバイス)の製造方法を提供することができる。
本発明は、前述の一実施の形態に限定されるものではなく、その要旨を逸脱しない範囲において種々変形可能である。例えば、前述の実施の形態は液晶表示デバイス、半導体集積回路のそれぞれの電子デバイスに本発明を適用した例を説明したが、本発明は、プリント配線基板を含む電子デバイスにおいて、上下配線間の層間絶縁膜に液体材料を使用してもよい。
Claims (9)
- ポリシラザンを溶解した第1の液体材料を基板上に塗布する工程と、
前記第1の液体材料中のSiの未結合手を減少する工程と、
前記未結合手を減少した後に、前記第1の液体材料上にその第1の液体材料と同様の第2の液体材料を塗布する工程と、
前記第1の液体材料及び第2の液体材料をSi系絶縁膜に転換する工程と、
を備えたことを特徴とする絶縁膜の製造方法。 - 前記第1の液体材料及び第2の液体材料を塗布する工程は、有機溶媒にポリシラザンを溶解した液体材料を塗布する工程であることを特徴とする請求項1に記載の絶縁膜の製造方法。
- 前記Siの未結合手を減少する工程は、前記Siの未結合手にH又はOを供給する工程であることを特徴とする請求項1又は請求項2に記載の絶縁膜の製造方法。
- 前記Siの未結合手にH又はOを供給する工程は、プラズマ処理又はウエット処理を用い、前記Siの未結合手にH又はOを供給する工程であることを特徴とする請求項3に記載の絶縁膜の製造方法。
- 前記第1の液体材料及び前記第2の液体材料のポリシラザンには、構造式−[SiH2NH]n−(nは自然数)において表されるポリベルヒドロシニザン、又は構造式−[SiR1R2−NR3]m−(mは自然数)において表され側鎖R1、R2若しくはR3に−CH3、−CH=CH2若しくは−OCH3を有するものが使用され、
前記有機溶媒には、芳香族化合物又は脂肪族化合物が使用されることを特徴とする請求項2乃至請求項4のいずれかに記載の絶縁膜の製造方法。 - 前記シリコン系絶縁膜に転換する工程は、H2O又はO2ガス雰囲気中において前記第1の液体材料及び第2の液体材料に熱処理を行い、シリコン酸化膜を形成する工程であることを特徴とする請求項1又は請求項2に記載の絶縁膜の製造方法。
- 基板上の第1の半導体薄膜の表面上に、ポリシラザンを溶解した第1の液体材料を塗布する工程と、
前記第1の液体材料中のSiの未結合手を減少する工程と、
前記未結合手を減少した後に、前記第1の液体材料上にその第1の液体材料と同様の第2の液体材料を塗布する工程と、
前記第1の液体材料及び第2の液体材料をSi系絶縁膜に転換し、ゲート絶縁膜を形成する工程と、
前記ゲート絶縁膜上に第2の半導体薄膜又は金属膜を形成する工程と、
を備えたことを特徴とするトランジスタの製造方法。 - 基板にその表面から深さ方向に向かってトレンチを形成する工程と、
前記トレンチ内の側面上及び底面上に、ポリシラザンを溶解した第1の液体材料を塗布する工程と、
前記第1の液体材料中のSiの未結合手を減少する工程と、
前記未結合手を減少した後に、前記第1の液体材料上にその第1の液体材料と同様の第2の液体材料を塗布する工程と、
前記第1の液体材料及び第2の液体材料をSi系絶縁膜に転換する工程と、
を備えたことを特徴とする電子デバイスの製造方法。 - 前記第1の液体材料及び第2の液体材料を塗布する工程は、有機溶媒にポリシラザンを溶解した液体材料を塗布する工程であることを特徴とする請求項7に記載のトランジスタの製造方法又は請求項8に記載の電子デバイスの製造方法。
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KR1020060084507A KR100835026B1 (ko) | 2005-12-15 | 2006-09-04 | 절연막의 제조 방법, 트랜지스터의 제조 방법 및 전자디바이스의 제조 방법 |
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KR20090107882A (ko) * | 2008-04-10 | 2009-10-14 | 삼성전자주식회사 | 고정층을 포함하는 경사 조성 봉지 박막 및 그의 제조방법 |
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KR20100071650A (ko) * | 2008-12-19 | 2010-06-29 | 삼성전자주식회사 | 가스차단성박막, 이를 포함하는 전자소자 및 이의 제조방법 |
US8080463B2 (en) * | 2009-01-23 | 2011-12-20 | Kabushiki Kaisha Toshiba | Semiconductor device manufacturing method and silicon oxide film forming method |
JP2010283256A (ja) * | 2009-06-08 | 2010-12-16 | Toshiba Corp | 半導体装置およびnand型フラッシュメモリの製造方法 |
US8105901B2 (en) * | 2009-07-27 | 2012-01-31 | International Business Machines Corporation | Method for double pattern density |
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