JP2011530192A - 薄膜トランジスタ用のハイブリッド誘電体材料 - Google Patents
薄膜トランジスタ用のハイブリッド誘電体材料 Download PDFInfo
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- JP2011530192A JP2011530192A JP2011522128A JP2011522128A JP2011530192A JP 2011530192 A JP2011530192 A JP 2011530192A JP 2011522128 A JP2011522128 A JP 2011522128A JP 2011522128 A JP2011522128 A JP 2011522128A JP 2011530192 A JP2011530192 A JP 2011530192A
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- Prior art keywords
- layer
- gate
- silicon
- substrate
- amorphous silicon
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- 239000010409 thin film Substances 0.000 title description 20
- 239000003989 dielectric material Substances 0.000 title description 19
- 239000000463 material Substances 0.000 claims abstract description 85
- 239000011521 glass Substances 0.000 claims abstract description 82
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 claims abstract description 64
- 239000012212 insulator Substances 0.000 claims abstract description 54
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 44
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000001301 oxygen Substances 0.000 claims abstract description 43
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 42
- 238000002161 passivation Methods 0.000 claims abstract description 35
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 104
- 239000000758 substrate Substances 0.000 claims description 98
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- 239000007789 gas Substances 0.000 claims description 51
- 238000000151 deposition Methods 0.000 claims description 50
- 239000002243 precursor Substances 0.000 claims description 48
- 239000004065 semiconductor Substances 0.000 claims description 42
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 37
- 230000005669 field effect Effects 0.000 claims description 35
- 238000000059 patterning Methods 0.000 claims description 35
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- 239000010703 silicon Substances 0.000 claims description 35
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 31
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 22
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- 230000008021 deposition Effects 0.000 claims description 20
- 238000004519 manufacturing process Methods 0.000 claims description 19
- 239000007800 oxidant agent Substances 0.000 claims description 19
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- UQEAIHBTYFGYIE-UHFFFAOYSA-N hexamethyldisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)C UQEAIHBTYFGYIE-UHFFFAOYSA-N 0.000 claims description 18
- 230000001590 oxidative effect Effects 0.000 claims description 17
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 claims description 16
- 229910052757 nitrogen Inorganic materials 0.000 claims description 15
- 229920000642 polymer Polymers 0.000 claims description 15
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- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 10
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- 239000001272 nitrous oxide Substances 0.000 claims description 8
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 8
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- 235000012239 silicon dioxide Nutrition 0.000 claims description 7
- 239000007772 electrode material Substances 0.000 claims description 6
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- XMSXQFUHVRWGNA-UHFFFAOYSA-N Decamethylcyclopentasiloxane Chemical compound C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1 XMSXQFUHVRWGNA-UHFFFAOYSA-N 0.000 claims description 4
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- HMMGMWAXVFQUOA-UHFFFAOYSA-N octamethylcyclotetrasiloxane Chemical compound C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1 HMMGMWAXVFQUOA-UHFFFAOYSA-N 0.000 claims description 4
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 claims description 4
- UHUUYVZLXJHWDV-UHFFFAOYSA-N trimethyl(methylsilyloxy)silane Chemical group C[SiH2]O[Si](C)(C)C UHUUYVZLXJHWDV-UHFFFAOYSA-N 0.000 claims description 4
- 239000011787 zinc oxide Substances 0.000 claims description 4
- 238000005468 ion implantation Methods 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- AJNVQOSZGJRYEI-UHFFFAOYSA-N digallium;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Ga+3].[Ga+3] AJNVQOSZGJRYEI-UHFFFAOYSA-N 0.000 claims description 2
- 229910001195 gallium oxide Inorganic materials 0.000 claims description 2
- KYKLWYKWCAYAJY-UHFFFAOYSA-N oxotin;zinc Chemical compound [Zn].[Sn]=O KYKLWYKWCAYAJY-UHFFFAOYSA-N 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- XUIMIQQOPSSXEZ-NJFSPNSNSA-N silicon-30 atom Chemical compound [30Si] XUIMIQQOPSSXEZ-NJFSPNSNSA-N 0.000 claims 1
- 239000002210 silicon-based material Substances 0.000 claims 1
- 229910004298 SiO 2 Inorganic materials 0.000 abstract description 9
- 239000011651 chromium Substances 0.000 description 39
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- 229910052804 chromium Inorganic materials 0.000 description 9
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- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 7
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- 239000010408 film Substances 0.000 description 6
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 6
- 101100214488 Solanum lycopersicum TFT2 gene Proteins 0.000 description 5
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- 238000006243 chemical reaction Methods 0.000 description 5
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- 239000004973 liquid crystal related substance Substances 0.000 description 5
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- 239000012495 reaction gas Substances 0.000 description 5
- 238000002207 thermal evaporation Methods 0.000 description 5
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 4
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- FFUAGWLWBBFQJT-UHFFFAOYSA-N hexamethyldisilazane Chemical compound C[Si](C)(C)N[Si](C)(C)C FFUAGWLWBBFQJT-UHFFFAOYSA-N 0.000 description 4
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- 150000004756 silanes Chemical class 0.000 description 1
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- 229920005573 silicon-containing polymer Polymers 0.000 description 1
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- 238000004544 sputter deposition Methods 0.000 description 1
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- 238000010408 sweeping Methods 0.000 description 1
- RIQXSPGGOGYAPV-UHFFFAOYSA-N tetrabenzo(a,c,l,o)pentacene Chemical compound C1=CC=CC2=C(C=C3C(C=C4C=C5C6=CC=CC=C6C=6C(C5=CC4=C3)=CC=CC=6)=C3)C3=C(C=CC=C3)C3=C21 RIQXSPGGOGYAPV-UHFFFAOYSA-N 0.000 description 1
- IFLREYGFSNHWGE-UHFFFAOYSA-N tetracene Chemical compound C1=CC=CC2=CC3=CC4=CC=CC=C4C=C3C=C21 IFLREYGFSNHWGE-UHFFFAOYSA-N 0.000 description 1
- NLDYACGHTUPAQU-UHFFFAOYSA-N tetracyanoethylene Chemical group N#CC(C#N)=C(C#N)C#N NLDYACGHTUPAQU-UHFFFAOYSA-N 0.000 description 1
- PCCVSPMFGIFTHU-UHFFFAOYSA-N tetracyanoquinodimethane Chemical compound N#CC(C#N)=C1C=CC(=C(C#N)C#N)C=C1 PCCVSPMFGIFTHU-UHFFFAOYSA-N 0.000 description 1
- CZDYPVPMEAXLPK-UHFFFAOYSA-N tetramethylsilane Chemical compound C[Si](C)(C)C CZDYPVPMEAXLPK-UHFFFAOYSA-N 0.000 description 1
- 238000005382 thermal cycling Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 238000003949 trap density measurement Methods 0.000 description 1
- XOAJIYVOSJHEQB-UHFFFAOYSA-N trimethyl trimethoxysilyl silicate Chemical compound CO[Si](OC)(OC)O[Si](OC)(OC)OC XOAJIYVOSJHEQB-UHFFFAOYSA-N 0.000 description 1
- PQDJYEQOELDLCP-UHFFFAOYSA-N trimethylsilane Chemical compound C[SiH](C)C PQDJYEQOELDLCP-UHFFFAOYSA-N 0.000 description 1
- 238000010396 two-hybrid screening Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000007704 wet chemistry method Methods 0.000 description 1
Classifications
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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
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/49—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET
- H01L29/4908—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET for thin film semiconductor, e.g. gate of TFT
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- C—CHEMISTRY; METALLURGY
- 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
- C23C16/22—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 deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/40—Oxides
- C23C16/401—Oxides containing silicon
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- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02123—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon
- H01L21/02126—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material containing Si, O, and at least one of H, N, C, F, or other non-metal elements, e.g. SiOC, SiOC:H or SiONC
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02205—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates the layer being characterised by the precursor material for deposition
- H01L21/02208—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates the layer being characterised by the precursor material for deposition the precursor containing a compound comprising Si
- H01L21/02214—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates the layer being characterised by the precursor material for deposition the precursor containing a compound comprising Si the compound comprising silicon and oxygen
- H01L21/02216—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates the layer being characterised by the precursor material for deposition the precursor containing a compound comprising Si the compound comprising silicon and oxygen the compound being a molecule comprising at least one silicon-oxygen bond and the compound having hydrogen or an organic group attached to the silicon or oxygen, e.g. a siloxane
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- H01L21/02263—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase
- H01L21/02271—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition
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- H01L21/02296—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer
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- 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
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/314—Inorganic layers
- H01L21/316—Inorganic layers composed of oxides or glassy oxides or oxide based glass
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- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
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- 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
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- H10K10/40—Organic transistors
- H10K10/46—Field-effect transistors, e.g. organic thin-film transistors [OTFT]
- H10K10/462—Insulated gate field-effect transistors [IGFETs]
- H10K10/468—Insulated gate field-effect transistors [IGFETs] characterised by the gate dielectrics
- H10K10/471—Insulated gate field-effect transistors [IGFETs] characterised by the gate dielectrics the gate dielectric comprising only organic materials
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Abstract
Description
本出願は、その内容全体が参照により本明細書に援用されている2008年8月4日出願の米国仮特許出願第61/086,047号明細書の優先権を請求するものである。
ハイブリッドは、以下で「小規模PE−CVD」と記されている単一チャンバ反応装置内でのプラズマ化学気相成長法(PE−CVD)によって被着される。ハイブリッド材料の開発中に、小規模PE−CVDは数度にわたり再構成された。ハイブリッドゲート誘電体は、以下で説明する通り電極表面積および気体補給が異なる2つの構成で被着された。
気体補給プレナム全体にわたる動力電極とグリッドの表面積102cm2
基板温度:公称室温
動力電極の表面積182cm2;気体補給リングの直径7.5cm。
基板温度:公称室温〜310℃
2つの異なるTFT幾何形状のためのプロセスシーケンスを以下で記述する。両方共、チャネル半導体用として非晶質水素化ケイ素(a−Si:Hまたはa−Si)を使用している。第1のものはガラスおよびKaptonTMポリイミドホイル基板上に作られた従来のインバーテッド・スタガード幾何形状であり、第2のものはトップゲート・スタガード幾何形状である。
ガラス基板を、150℃または200℃で4チャンバPECVD内で約250nmのSiNxを用いてか、または室温で小規模PECVD内で約250nmのOSGを用いてコーティングした。その後、50〜70nmのCrゲート接点金属を熱蒸発させた。(図15A参照)。マスク#1:ゲートパターン化。フォトレジストを回し続け、予備焼成し、レジストをゲート金属パターンを伴うフォトマスクを通してUV光に曝露し、レジストを現像し、クロムエッチャントでクロムを湿式エッチングし、残留フォトレジストを剥ぎ取る(図15Bを参照)。
KaptonTMポリイミドホイル基板を、150℃または200℃で4チャンバPECVD内で約250nmのSiNxを用いてか、または室温で小規模PECVD内で約250nmのOSGを用いてコーティングした。その後、20/50/20nmの3層Cr/Al/Crゲート接点金属を熱蒸発させた。(図16A参照)。
ガラス基板を、150℃または200℃で4チャンバPECVD内で約250nmのSiNxを用いてか、または室温で小規模PECVD内で約250nmのハイブリッドを用いてコーティングした。その後、50〜70nmのCrソースおよびドレイン接点金属を熱蒸発させた。4チャンバPECVDに移送した後、ソースおよびドレイン層のためのおよそ40nmのn+a−Siを被着させた(図17A参照)。
ガラス基板を、150℃または200℃で4チャンバPECVD内で約250nmのSiNxを用いコーティングし、その後、ゲート接点として60nmのCr金属層を熱蒸発させた。
以上で記述した方法を用いて、大部分はガラス基板上に従来のインバーテッド・スタガード幾何形状で、a−Si:H TFTを調製した。この幾何形状の横断面図は、図1および10に示されている。代表的実施例の製造、評価および特徴について以下で記述する。これらの試料は、TFT1、TFT2、TFT3およびTFT4と呼称される。応力および可撓性試験のため一連のTFTも同様にポリイミドホイル上で製造し、トップゲート・コプラナー幾何形状のOSGゲート誘電体を伴うTFTを、本発明の一般原理を実証するものとして製造した。実施例は、プロセス温度、基板、幾何形状およびゲート絶縁体の厚み、ゲート誘電体のためのハイブリッド材料の使用、バックチャネル不動態化および基板不動態化の変形形態のいくつかを例証し、得ることのできる改善された電気的および物理的特性を示している。
TFT1
図2は、それぞれ80μmおよび10μmというチャネル幅およびチャネル長を有するTFT1のIDS−VDS特性を示す。線形領域は拡大され、図3に示されている。伝達特性は図4に示されている。線形領域内の1.11cm2/V・sの電子電界効果移動度が、ドレイン電流対ゲート電圧の勾配、ゲート幅W対ゲート長Lの比、ゲートキャパシタンスCおよび0.1Vというドレイン−ソースバイアス電圧から抽出される。ドレイン電流の平方根対ゲート電圧の勾配、W/L比およびゲートキャパシタンスから、1.12cm2/V・sの飽和移動度が導出される。閾値電圧は約5Vであり、オン/オフ電流比は107超であり、閾値下勾配は500mV/decadeである。
図7は、60μmのチャネル幅および60μmのチャネル長を有するTFT2のIDS−VDS特性を示す。特性はバイアス応力付加の前後で示されている。バイアス応力付加前後の伝達特性およびゲート漏洩電流は、図8に示されている。このTFTは、2.9Vの閾値電圧;および、線形領域内で2.37cm2/V・s、飽和領域内で2.29cm2/V・sの電子電界効果移動度を有していた。
図11および12は、ハイブリッド誘電体を伴うTFT3の特性と、ゲート誘電体としてSiNxで製造された従来のTFTの特性とを比較している。寸法および測定条件は、ゲート誘電体およびバックチャネル層を除いて同一である。図11でプロットされた出力(IDS−VDS)特性は、「ハイブリッド」TFTが「SiNx」TFTの電流の約4倍を生成することを示している。図12のDC伝達(log10[IDS−VGS])特性は、約1pAのOFFおよびゲート漏洩電流が、両方のTFTについて類似であること、「ハイブリッド」TFTについてON電流およびON/OFF比がさらに高いこと、閾値勾配が、「ハイブリッド」について270mV/decであるのに対し「SiNx」TFTについては500mV/decであることを示している。「ハイブリッド」TFTの飽和(VDS=10V)および線形領域(VDS=0.1V)に対する図4の最小二乗適合は、それぞれμn,sat=2.0cm2/V・sおよびμn,lin=2.1cm2/V・s、そしてVT=2.0および2.5Vを生成する。
これらのTFTは、ホイル基板に充分接着し(以下参照)、1.2cm2/Vsの電子電界効果移動度、300mV/decadeの閾値下勾配、107のON/OFF比、そして10−12Aの漏洩電流を有することが発見された。
TFT製造に先立ち厚み50μmのポリイミド基板ホイルを不動態化するために、弾性SiO2−シリコーンハイブリッド材料を使用した(上記第2.2項を参照のこと)。基板の両面上または基板のTFT側の面のみで、ハイブリッド材料の厚みおよそ300−nmの層で、基板を不動態化した。ポリイミド基板に対するハイブリッド不動態化層の接着力を、任意には、ハイブリッド層の被着に先立ち厚みおよそ10nmのSiNxサビング層を被着させることによって改善してよい。不動態化されたポリイミドの上に構築された個々のTFTを1分間、公知の半径まで屈曲させ、次に伝達特性の測定のために平担化した。屈曲軸は、ソース・ドレイン電流経路に対して垂直であった。このプロセスを、TFTが電気的に不全になるまで反復した。ハイブリッド誘電体で作られたTFTは、圧縮ひずみを受けた時点で、SiNxで作られた従来のTFTと類似の可撓性を示したが、引張りひずみを受けた場合、著しく増大した可撓性を示した。
Claims (43)
- 電界効果トランジスタを含む電子デバイスにおいて、電界効果トランジスタが、
− 半導体材料を含む半導体活性層と;
− ソース電極およびドレイン電極と;
− ゲート電極と;
− ゲート電極と半導体活性層の間に配置され、本質的に有機ケイ酸塩ガラスで構成された絶縁材料と;
を含んでいる、電子デバイス。 - 前記半導体材料が、非晶質ケイ素、ナノ結晶ケイ素、微結晶ケイ素、多結晶ケイ素、酸化亜鉛、酸化亜鉛錫または酸化亜鉛ガリウムから選択されている、請求項1に記載のデバイス。
- 前記半導体材料が非晶質ケイ素である、請求項2に記載のデバイス。
- 前記半導体材料が水素化非晶質ケイ素である、請求項3に記載のデバイス。
- 前記半導体材料が有機半導体である、請求項1に記載のデバイス。
- 前記絶縁材料が有機ケイ酸塩ガラスで構成されている、請求項1〜5のいずれか一項に記載のデバイス。
- 前記有機ケイ酸塩ガラスが70%〜95%の二酸化ケイ素と30%〜5%のシロキサンポリマーを含む、請求項1〜6のいずれか一項に記載のデバイス。
- 本質的に有機ケイ酸塩ガラスで構成されたバックチャネル不動態化層をさらに含み、このバックチャネル不動態化層が前記半導体活性層と物理的接触状態にある、請求項1〜7のいずれか一項に記載のデバイス。
- バックチャネル不動態化層が有機ケイ酸塩ガラスで構成されている、請求項1〜8のいずれか一項に記載のデバイス。
- 前記有機ケイ酸塩ガラスが、1つ以上の揮発性シリコーン前駆体と酸素を含む気体混合物からプラズマ化学気相成長法により被着される、請求項1〜9のいずれか一項に記載のデバイス。
- 前記気体混合物がさらに、1つ以上の揮発性窒素供給源を含む、請求項11に記載のデバイス。
- 前記揮発性シリコーン前駆体が、テトラメチジシロキサン、ヘキサメチルジシロキサン、オクタメチルトリシロキサン、ヘキサメチルシクロトリシロキサン、オクタメチルシクロテトラシロキサン、デカメチルシクロペンタシロキサン、および2,2,−ジアルキル−1,3−ジオキサ−2−シラシクロペンタン類からなる群から選択されている、請求項11に記載のデバイス。
- 前記揮発性シリコーン前駆体がヘキサメチルジシロキサンである、請求項12に記載のデバイス。
- 可撓性基板をさらに含み、前記電界効果トランジスタが可撓性基板の上方に取付けられている、請求項1〜13のいずれか一項に記載のデバイス。
- 前記基板と前記電界効果トランジスタとの間に配置されたサビング層または不動態化層をさらに含む、請求項14に記載のデバイス。
- 前記サビング層または不動態化層が本質的に有機ケイ酸塩ガラスで構成されている、請求項15に記載のデバイス。
- 前記サビング層または不動態化層が有機ケイ酸塩ガラスで構成されている、請求項16に記載のデバイス。
- 前記絶縁材料がゲート絶縁体層を形成し、前記ゲート絶縁体層の厚みが300nm未満である、請求項1に記載のデバイス。
- 前記ゲート絶縁体層の厚みが250nm未満である、請求項18に記載のデバイス。
- 前記トランジスタが、線形領域内で1.5cm2/V・s超の有効電子電界効果移動度、1×106超のオン/オフ電流比、4.0V未満の閾値電圧そして500mV/dec未満の閾値下勾配を有する、請求項1に記載のデバイス。
- 前記デバイスがディスプレー画面である、請求項1に記載のデバイス。
- 前記デバイスが有機発光デバイスである、請求項1に記載のデバイス。
- 電界効果トランジスタの製造方法において、
− 基板を提供するステップと;
− (a)被着チャンバ内に前記基板を置くステップと;
(b)揮発性シリコーン前駆体と、酸素、オゾン、過酸化水素および亜酸化窒素からなる群から選択された少なくとも1つの酸化剤ガスとを含む供給源ガスを前記チャンバ内に導入するステップと;
(c)前記チャンバに対して無線周波数、マイクロ周波数または直流出力を印加するステップと;
を含むステップにより前記基板の上方にゲート絶縁体層を形成させるステップと;
を含む方法。 - 前記酸化剤ガスが酸素である、請求項23に記載の方法。
- 酸素に対する揮発性シリコーン前駆体の毎分標準立方センチメートル単位で測定された体積流量百分率が0.1%〜10%である、請求項24に記載の方法。
- 酸素に対する揮発性シリコーン前駆体の体積流量百分率が0.5%〜8%である、請求項25に記載の方法。
- 酸素に対する揮発性シリコーン前駆体の体積流量百分率が1%〜6%である、請求項26に記載の方法。
- 酸素対揮発性シリコーン前駆体の体積流量比が少なくとも25:1である、請求項24に記載の方法。
- 前記揮発性シリコーン前駆体がテトラメチジシロキサン、ヘキサメチルジシロキサン、オクタメチルトリシロキサン、ヘキサメチルシクロトリシロキサン、オクタメチルシクロテトラシロキサン、デカメチルシクロペンタシロキサン、および2,2,−ジアルキル−1,3−ジオキサ−2−シラシクロペンタン類からなる群から選択されている、請求項23〜28のいずれか一項に記載の方法。
- 前記揮発性シリコーン前駆体がヘキサメチルジシロキサンである、請求項29に記載の方法。
- 前記基板が、窒化ケイ素または有機ケイ酸塩ガラスからなるサビング層または不動態化層を有する、請求項23〜30のいずれか一項に記載の方法。
- 前記基板の上方に非晶質水素化ケイ素層を被着させるステップをさらに含む、請求項23〜31のいずれか一項に記載の方法。
- 前記非晶質水素化ケイ素層が前記絶縁体層上に被着させられる、請求項32に記載の方法。
- 前記非晶質水素化ケイ素層上にドープド非晶質水素化ケイ素層を被着させるステップをさらに含む、請求項33に記載の方法。
- 前記基板がゲート電極を有し、前記ゲート絶縁体層が前記ゲート電極の上方に形成されている、請求項30に記載の方法。
- − 前記ゲート絶縁層の上方に半導体材料を被着させて活性半導体層を形成するステップと;
− 各々前記半導体活性層と電気的接続状態にあるソース電極およびドレイン電極を形成するステップと;
をさらに含む、請求項35に記載の方法。 - 前記基板が、ソース電極と、ドレイン電極と、前記ソース電極および前記ドレイン電極と電気的接続状態にある半導体活性層とを含み、前記ゲート絶縁体層が前記半導体活性層の上方に形成されている、請求項23に記載の方法。
- − 前記ゲート絶縁層の上方にゲート導体層を形成するステップと;
− 前記ゲート導体層をパターン化してゲート電極を形成するステップと、
をさらに含む、請求項37に記載の方法。 - 前記ゲート絶縁体層を形成する前に、
− 前記基板の上方にソース/ドレイン導体層を形成するステップと;
− 前記ソース/ドレイン導体層上にドープド非晶質水素化ケイ素層を形成するステップと;
− 前記ドープド非晶質水素化ケイ素層およびソース/ドレイン導体層をパターン化して別々のソースおよびドレイン電極を形成するステップと;
− 前記ドープド非晶質水素化ケイ素層上に非晶質水素化ケイ素層を形成するステップと;
をさらに含み、前記ゲート絶縁体層が前記非晶質水素化ケイ素層上に形成されている、請求項23に記載の方法。 - 前記ゲート絶縁体層、前記非晶質水素化ケイ素層および前記ドープド非晶質水素化ケイ素層をパターン化することによって前記ソースおよびドレイン電極を曝露するステップをさらに含む、請求項39に記載の方法。
- 前記基板が、非晶質ケイ素、ナノ結晶ケイ素、微結晶ケイ素または多結晶ケイ素からなる群から選択されたケイ素材料を含むケイ素層を有し、前記ゲート絶縁体層が前記ケイ素層上に形成されている、請求項23に記載の方法。
- − 前記ゲート絶縁体層をパターン化して前記ケイ素層を曝露するステップと;
− イオン注入により前記曝露済みケイ素にドープすることによってかまたはドープドケイ素層を被着させることによって、前記曝露済みケイ素上にドープドケイ素層を形成するステップと;
− 電極材料層を被着させるステップと;
− 前記電極材料をパターン化して、ゲート電極、ソース電極およびドレイン電極を形成するステップと;
をさらに含む、請求項41に記載の方法。 - 前記ゲート絶縁体層が150℃未満の温度で形成される、請求項23に記載の方法。
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US9257590B2 (en) | 2010-12-20 | 2016-02-09 | Industrial Technology Research Institute | Photoelectric element, display unit and method for fabricating the same |
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KR20110039454A (ko) | 2011-04-18 |
TWI573275B (zh) | 2017-03-01 |
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KR20160114201A (ko) | 2016-10-04 |
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