JP4062702B2 - レーザー結晶化プロセスを用いた薄膜トランジスタの製造方法 - Google Patents
レーザー結晶化プロセスを用いた薄膜トランジスタの製造方法 Download PDFInfo
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- 239000010409 thin film Substances 0.000 title claims description 108
- 238000000034 method Methods 0.000 title claims description 80
- 238000005499 laser crystallization Methods 0.000 title claims description 33
- 238000004519 manufacturing process Methods 0.000 title claims description 33
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 80
- 239000000758 substrate Substances 0.000 claims description 27
- 239000013078 crystal Substances 0.000 claims description 18
- 238000002425 crystallisation Methods 0.000 claims description 13
- 230000008025 crystallization Effects 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 7
- 229910021421 monocrystalline silicon Inorganic materials 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000001678 irradiating effect Effects 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 61
- 239000010408 film Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 229920002120 photoresistant polymer Polymers 0.000 description 9
- 229910052814 silicon oxide Inorganic materials 0.000 description 7
- 238000005468 ion implantation Methods 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 238000001994 activation Methods 0.000 description 4
- 239000002019 doping agent Substances 0.000 description 4
- 238000005530 etching Methods 0.000 description 4
- 238000005224 laser annealing Methods 0.000 description 4
- 229910052581 Si3N4 Inorganic materials 0.000 description 3
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000001312 dry etching Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000001259 photo etching Methods 0.000 description 3
- 238000000206 photolithography Methods 0.000 description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 229910000077 silane Inorganic materials 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- -1 0 <X <2) Inorganic materials 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
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- C30B13/00—Single-crystal growth by zone-melting; Refining by zone-melting
- C30B13/16—Heating of the molten zone
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Description
TFT)の製造方法を提供することである。
をベースとしたSiOX 、0<X<2)、4エチルオルソシリケートを基本とした酸化シリコン(TEOSをベースとしたSiOX
、0<X<2)、窒化シリコン(SINX、0<X<1.33)、シリコンオキシナイトライド(SiOXNY 、0<X<2、0<Y<1.33)などである。パターン化された多結晶層134と誘電体層136の上に、金属層138をスパッター工程で生成する。金属層138はタングステン層(W)、クロム層(Cr)、その他の導電金属層などの何れでも良い。
12 多結晶層
16 ゲート絶縁膜
24 ゲート
26 低温多結晶薄膜トランジスタ
28 ソース
32 ドレイン
34 誘電体層
36 コンタクトホール
38 多結晶薄膜粒
42 結晶粒界
100 絶縁基板
102 アモルファスシリコン薄膜
104 マスク
106 フォトレジスト層
108、208,308 アモルファスシリコンパターン
116、216,316 ソース領域
118、218、318 ドレイン領域
122、222,322 とがった領域
124、224,324 第3の領域
126、226,326 チャンネル領域
134 パターン化された多結晶層
136 誘電体層
138 金属層
144 ゲート
146 ソース/ドレイン
148、248,348 多結晶薄膜トランジスタ
152 誘電体層
154 コンタクトホール
Claims (11)
- 基板が提供され、アモルファスシリコンのパターンが基板の上に形成され、アモルファスシリコンのパターンとして、第1の側と、その反対側の第2の側が形成され、
前記アモルファスシリコンのパターンは前記第1の側から前記第2の側へ伸びるソース領域、前記第2の側から前記第1の側へ伸びるドレイン領域、該ドレイン領域に直に隣接して前記第1の側へ伸びる少なくとも1つの第1のとがった領域、該ソース領域と該ドレイン領域との間にある第3の領域、第3の領域の上で、該ソース領域と該第1のとがった領域との間にある少なくとも1つのチャンネル領域からなるように形成し、
ソース領域とドレイン領域とは第1の高さと、第1の幅と、第1の長さとをもち、第1のとがった領域は第2の高さと、第2の幅と、第2の長さとをもち、
第1のとがった領域は第3の領域の上にあり、第2の高さは第1の高さより低く、
第3の領域は第3の高さと、第3の幅と、第3の長さとをもち、第3の高さは第1の高さより低く、
チャンネル領域は第3の領域の上で、ソース領域と第1のとがった領域との間にあり、第4の高さと、第4の幅と、第4の長さとをもち、第4の高さは第2の高さより低く、第4の幅は第3の幅より狭く形成し、
レーザー結晶化プロセスを行って、該チャンネルの領域に直に隣接した該第1のとがった領域のアモルファスシリコンに種を作り、該チャンネルの領域に最初の単結晶シリコン粒として、成長し結晶化させる
ステップを含むことを特徴とするレーザー結晶化プロセスを用いた薄膜トランジスタの製造方法。 - 前記第1の高さを前記第2の高さと前記第3の高さとの和に等しく形成することを特徴とする請求項1に記載のレーザー結晶化プロセスを用いた薄膜トランジスタの製造方法。
- 前記第3の幅と前記第1の幅とを等しく形成することを特徴とする請求項1に記載のレーザー結晶化プロセスを用いた薄膜トランジスタの製造方法。
- 前記ソース領域と前記チャンネル領域との間に第2のとがった領域を形成し、該第2のとがった領域が、第5の高さと第5の幅と第5の長さとをもち、該第5の高さは前記第1の高さより低く形成することを特徴とする請求項1に記載のレーザー結晶化プロセスを用いた薄膜トランジスタの製造方法。
- 前記第1の高さを前記第5の高さと前記第3の高さとの和に等しく形成し、前記第3の高さが前記第4の高さより低く形成することを特徴とする請求項4に記載のレーザー結晶化プロセスを用いた薄膜トランジスタの製造方法。
- 前記レーザー結晶化プロセスを行って、前記チャンネル領域に直に隣接した前記第2のとがった領域のアモルファスシリコンに種を作り、前記チャンネル領域に第2の単結晶シリコン粒として、成長し結晶化させることを特徴とする請求項4に記載のレーザー結晶化プロセスを用いた薄膜トランジスタの製造方法。
- 前記レーザー結晶化プロセスでは、レーザパルスで前記アモルファスシリコンのパターンを照射して、前記チャンネル領域のアモルファスシリコンを完全に溶融し、前記第1のとがった領域のアモルファスシリコンを部分的に溶融し、前記チャンネル領域に直に隣接した前記第1のとがった領域に溶融しないで残った固体シリコンが横方向に結晶成長するための核になるようにすることを特徴とする請求項1に記載のレーザー結晶化プロセスを用いた薄膜トランジスタの製造方法。
- 前記第3の高さを前記第4の高さより低くし、前記アモルファスシリコンのパターンがレーザパルスで照射された後、前記第3の領域において、前記チャンネル領域と前記第1のとがった領域とに覆われていない部分の温度が、チャンネル領域の温度より高くなり、核が前記チャンネル領域から、前記チャンネル領域と前記第1のとがった領域とに覆われていない前記第3の領域へ向かって成長するようにすることを特徴とする請求項7に記載のレーザー結晶化プロセスを用いた薄膜トランジスタの製造方法。
- 前記レーザー結晶化プロセスでは、レーザパルスで前記アモルファスシリコンのパターンを照射して、前記第3の領域において、前記チャンネル領域と前記第1のとがった領域とに覆われていない部分が完全に溶融し、前記ソース領域と前記ドレイン領域のアモルファスシリコンは部分的に溶融し、前記ソース領域と前記ドレイン領域のアモルファスシリコンに複数の種ができ、前記第3の領域において、前記チャンネル領域と前記第1のとがった領域とに覆われていない部分に多結晶粒として結晶成長することを特徴とする請求項8に記載のレーザー結晶化プロセスを用いた薄膜トランジスタの製造方法。
- 前記レーザー結晶化プロセスで使用されるレーザとして、エキシマレーザ(EL)、ガスパルスレーザ、固体パルスレーザ、連続波レーザの何れかを含むことを特徴とする請求項1に記載のレーザー結晶化プロセスを用いた薄膜トランジスタの製造方法。
- 前記第3の領域を前記ソース領域と前記ドレイン領域との間に形成し、前記チャンネル領域と前記第1のとがった領域とを前記第3の領域の上に形成することを特徴とする請求項1に記載のレーザー結晶化プロセスを用いた薄膜トランジスタの製造方法。
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TW092116013A TWI222114B (en) | 2003-06-12 | 2003-06-12 | Method of forming a thin film transistor by a laser crystallization process |
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JP2005005677A JP2005005677A (ja) | 2005-01-06 |
JP4062702B2 true JP4062702B2 (ja) | 2008-03-19 |
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JP2004098429A Expired - Fee Related JP4062702B2 (ja) | 2003-06-12 | 2004-03-30 | レーザー結晶化プロセスを用いた薄膜トランジスタの製造方法 |
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US (1) | US7014708B2 (ja) |
JP (1) | JP4062702B2 (ja) |
TW (1) | TWI222114B (ja) |
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CN102945789B (zh) * | 2012-11-22 | 2015-07-22 | 京东方科技集团股份有限公司 | 低温多晶硅薄膜制备方法、薄膜晶体管及其制备方法 |
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US5688716A (en) * | 1994-07-07 | 1997-11-18 | Tessera, Inc. | Fan-out semiconductor chip assembly |
JP3778456B2 (ja) * | 1995-02-21 | 2006-05-24 | 株式会社半導体エネルギー研究所 | 絶縁ゲイト型薄膜半導体装置の作製方法 |
JP3883706B2 (ja) * | 1998-07-31 | 2007-02-21 | シャープ株式会社 | エッチング方法、及び薄膜トランジスタマトリックス基板の製造方法 |
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US7014708B2 (en) | 2006-03-21 |
TW200428498A (en) | 2004-12-16 |
US20040250754A1 (en) | 2004-12-16 |
JP2005005677A (ja) | 2005-01-06 |
TWI222114B (en) | 2004-10-11 |
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