JP2016515299A - 希土類酸化物ゲート誘電体を備えた、シリコン基板上に成長したiii−n半導体素子 - Google Patents
希土類酸化物ゲート誘電体を備えた、シリコン基板上に成長したiii−n半導体素子 Download PDFInfo
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- 229910001404 rare earth metal oxide Inorganic materials 0.000 title claims abstract description 88
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 239000010703 silicon Substances 0.000 title claims abstract description 75
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 74
- 239000000758 substrate Substances 0.000 title claims abstract description 59
- 239000004065 semiconductor Substances 0.000 title description 13
- 239000013078 crystal Substances 0.000 claims abstract description 96
- 239000000463 material Substances 0.000 claims abstract description 60
- 238000004519 manufacturing process Methods 0.000 claims abstract description 3
- 239000010410 layer Substances 0.000 claims description 145
- 238000000034 method Methods 0.000 claims description 35
- 238000000151 deposition Methods 0.000 claims description 20
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 5
- 150000002910 rare earth metals Chemical class 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 4
- 229910021421 monocrystalline silicon Inorganic materials 0.000 claims description 4
- 229910002704 AlGaN Inorganic materials 0.000 claims description 3
- 238000011065 in-situ storage Methods 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 5
- 238000000059 patterning Methods 0.000 claims 1
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 31
- 229910002601 GaN Inorganic materials 0.000 description 24
- 230000008569 process Effects 0.000 description 15
- 239000007789 gas Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052733 gallium Inorganic materials 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 238000002488 metal-organic chemical vapour deposition Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- VQCBHWLJZDBHOS-UHFFFAOYSA-N erbium(iii) oxide Chemical compound O=[Er]O[Er]=O VQCBHWLJZDBHOS-UHFFFAOYSA-N 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 229910017464 nitrogen compound Inorganic materials 0.000 description 2
- 150000002830 nitrogen compounds Chemical class 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 235000012431 wafers Nutrition 0.000 description 2
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910017493 Nd 2 O 3 Inorganic materials 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal 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
- 239000002243 precursor Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
Description
Claims (21)
- 希土類酸化物ゲート誘電体を備えた、シリコン基板上で成長したIII-N材料であって、
単結晶シリコン基板と、
前記シリコン基板に配置され、シリコン基板の表面と実質的に結晶格子整合する単結晶応力補償テンプレートと、
前記応力補償テンプレートの表面に配置され、前記単結晶応力補償テンプレートと実質的に結晶格子整合するGaN構造と、
前記GaN構造の上に成長した、前記GaN構造と実質的に結晶格子整合する単結晶III-N材料の活性層と、
前記III-N材料の活性層の上に成長した単結晶希土類酸化物誘電体層と、を有する、III-N材料。 - 前記応力補償テンプレートは一層または複数層の単結晶希土類酸化物を含む、請求項1に記載の希土類酸化物ゲート誘電体を備えた、シリコン基板上で成長したIII-N材料。
- 前記応力補償テンプレートは、連続的につながった複数の希土類酸化物の複合体、または互いの境界が急峻に変化する複数の希土類酸化物の複合体を含む、請求項2に記載の希土類酸化物ゲート誘電体を備えた、シリコン基板上で成長したIII-N材料。
- 前記複数の希土類酸化物を含む複合体は、前記シリコン基板に隣接して、シリコンの格子間隔のほぼ2倍の結晶格子間隔を有する第1の希土類酸化物と、前記GaN構造に隣接してGaN構造の結晶格子間隔にほぼ整合する結晶格子間隔を有する第2の希土類酸化物とを含む、請求項3に記載の希土類酸化物ゲート誘電体を備えた、シリコン基板上で成長したIII-N材料。
- 前記応力補償テンプレートが窒化アルミニウムおよび/または酸窒化アルミニウムの一層または複数の層を含む、請求項1に記載の希土類酸化物ゲート誘電体を備えた、シリコン基板上で成長したIII-N材料。
- 前記単結晶応力補償テンプレートは、
前記シリコン基板上で成長した立方構造の希土類酸化物の層、
前記立方REO層に成長したエピタキシャルシリコンの層、および
前記エピタキシャルシリコン層の上で成長したAlNの層を含む、請求項1に記載の希土類酸化物ゲート誘電体を備えた、シリコン基板上で成長したIII-N材料。 - 前記単結晶応力補償テンプレートの立方構造の希土類酸化物層は、前記単結晶希土類酸化物誘電体層と同じ希土類金属を含む、請求項6に記載の希土類酸化物ゲート誘電体を備えた、シリコン基板上で成長したIII-N材料。
- 前記単結晶希土類酸化物誘電体層はゲート誘電体層を形成するとともに、前記単結晶III-N材料の活性層の素子チャネルを定めるためにパターン化されている、請求項1に記載の希土類酸化物ゲート誘電体を備えた、シリコン基板上で成長したIII-N材料。
- 前記単結晶III-N材料の活性層の中の、前記単結晶希土類誘電体層の両対向側に形成されたソースおよびドレインと、前記ソースおよびドレインに形成されたソース接点およびドレイン接点と、前記単結晶希土類誘電体層の上に形成されたゲート積層体とをさらに含む、請求項8に記載の希土類酸化物ゲート誘電体を備えた、シリコン基板上で成長したIII-N材料。
- 前記単結晶III-N材料の活性層はAlGaNを含む、請求項1に記載の希土類酸化物ゲート誘電体を備えた、シリコン基板上で成長したIII-N材料。
- 希土類酸化物ゲート誘電体を備えたシリコン基板上で成長するIII-N材料の製造方法であって、
単結晶シリコン基板を用意し、
前記シリコン基板上に、前記シリコン基板の表面と実質的に結晶格子整合する単結晶応力補償テンプレートを成長または堆積させ、
前記単結晶応力補償テンプレートと実質的に整合する単結晶GaN構造を前記応力補償テンプレートの表面に成長または堆積させ、
前記GaN構造と実質的に結晶格子整合する単結晶III-N材料の活性層を前記GaN構造に成長もしくは堆積させ、ならびに
単結晶希土類酸化物誘電体層を前記III-N材料の活性層上に成長もしくは堆積させる、方法。 - 前記応力補償テンプレートを成長または堆積させるステップは、単結晶希土類酸化物を一層もしくは複数層エピタキシャル成長させることを含む、請求項11に記載の方法。
- 前記単結晶希土類酸化物を一層もしくは複数層成長させるステップは、
なだらかにもしくは急激に変化して接合する1つの希土類酸化物を含む、複数の希土類酸化物の複合体を形成するステップを含む、請求項12に記載の方法。 - 前記複合体を形成するステップは、
前記シリコン基板に隣接して、シリコンの格子間隔のほぼ2倍の結晶格子間隔を有する第1の希土類酸化物をエピタキシャル成長させるステップと、
前記GaN構造に隣接して前記GaN構造の結晶格子間隔にほぼ整合する結晶格子間隔を有する第2の希土類酸化物をエピタキシャル成長させるステップとを含む、請求項13に記載の方法。 - 前記単結晶希土類酸化物を一層もしくは複数層成長もしくは堆積させるステップは、複数の希土類酸化物を含む複合物を成長もしくは堆積させるステップを含む、請求項12に記載の方法。
- 前記応力補償テンプレートを成長もしくは堆積させるステップは、前記シリコン基板に立方構造の希土類酸化物の層を成長もしくは堆積させ、前記立方構造のREO層にエピタキシャルシリコンの層を成長もしくは堆積させ、および、前記エピタキシャルシリコン層にAlNの層を成長もしくは堆積させる各ステップを含む、請求項11に記載の方法。
- 前記単結晶応力補償テンプレートの立方構造の希土類酸化物の層を成長もしくは堆積させるステップ、および前記単結晶希土類酸化物誘電体層を成長もしくは堆積させるステップは、互いに同一種類の希土類酸化物を成長もしくは堆積させることを含む、請求項16に記載の方法。
- 前記単結晶希土類酸化物誘電体層をゲート誘電体層として形成するステップと、前記単結晶III-N材料の活性層の素子チャネルを定めるために前記ゲート誘電体層をパターン化するステップとをさらに含む、請求項11に記載の方法。
- 前記単結晶ゲート誘電体層の両対向側の単結晶III-N材料の活性層にソースおよびドレインを形成するステップと、前記ソースおよびドレインの上にソース接点およびドレイン接点を形成し、前記単結晶ゲート誘電体層の上にゲート積層体を形成するステップとをさらに含む、請求項18に記載の方法。
- 前記単結晶応力補償テンプレートを成長もしくは堆積させるステップ、前記GaN構造を成長もしくは堆積させるステップ、前記単結晶III-N材料の活性層を成長もしくは堆積させるステップならびに前記単結晶希土類酸化物誘電体層を成長もしくは堆積させるステップは、すべてその場で(in-situ)すなわち連続した操作により実行される、請求項11に記載の方法。
- 前記単結晶III-Nの活性層を成長させもしくは堆積させるステップは、AlGaNの層を成長もしくは堆積させることを含む、請求項11に記載の方法。
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PCT/US2014/010340 WO2014130164A1 (en) | 2013-02-22 | 2014-01-06 | REO GATE DIELECTRIC FOR III-N DEVICE ON Si SUBSTRATE |
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