JP2009537983A - 自己整合した耐熱性コンタクトを備える半導体デバイス及びその作製方法 - Google Patents
自己整合した耐熱性コンタクトを備える半導体デバイス及びその作製方法 Download PDFInfo
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- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
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- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
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- 238000001004 secondary ion mass spectrometry Methods 0.000 description 1
- WNUPENMBHHEARK-UHFFFAOYSA-N silicon tungsten Chemical compound [Si].[W] WNUPENMBHHEARK-UHFFFAOYSA-N 0.000 description 1
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- MAKDTFFYCIMFQP-UHFFFAOYSA-N titanium tungsten Chemical compound [Ti].[W] MAKDTFFYCIMFQP-UHFFFAOYSA-N 0.000 description 1
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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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- H10D30/471—High electron mobility transistors [HEMT] or high hole mobility transistors [HHMT]
- H10D30/475—High electron mobility transistors [HEMT] or high hole mobility transistors [HHMT] having wider bandgap layer formed on top of lower bandgap active layer, e.g. undoped barrier HEMTs such as i-AlGaN/GaN HEMTs
- H10D30/4755—High electron mobility transistors [HEMT] or high hole mobility transistors [HHMT] having wider bandgap layer formed on top of lower bandgap active layer, e.g. undoped barrier HEMTs such as i-AlGaN/GaN HEMTs having wide bandgap charge-carrier supplying layers, e.g. modulation doped HEMTs such as n-AlGaAs/GaAs HEMTs
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Abstract
Description
Claims (40)
- 半導体デバイスを形成する方法であって、
半導体基板の上に半導体層を形成するステップと、
前記半導体層の上にマスクを形成するステップと、
前記半導体層の上に複数のイオン注入領域を形成するために、前記マスクによって前記半導体層へ第1の伝導型を有するイオンを注入するステップと、
前記マスクによって前記複数のイオン注入領域の上に金属層を形成するステップと、
前記複数のイオン注入領域に注入されたイオンをそれぞれ活性化し、かつ前記複数のイオン注入領域の上にオーミックコンタクトを設けるために、前記複数のイオン注入領域および前記金属層を単一工程でアニールするステップと
を含むことを特徴とする方法。 - 前記半導体層を形成するステップは、
前記半導体基板の上にチャネル層を形成するステップと、
前記チャネル層の上に障壁層を形成するステップと、
前記障壁層の上に保護層を形成するステップと
を含み、
前記マスクを形成するステップは、前記保護層の上に前記マスクを形成するステップを含むことを特徴とする請求項1に記載の方法。 - 前記イオンを注入するステップは、前記障壁層の表面の少なくとも一部を露出するように、前記マスクによって前記保護層をエッチングするステップにより先行され、
前記イオンを注入するステップは、前記障壁層の上にイオン注入領域を形成するために、前記マスクによって前記障壁層へ、前記第1の伝導型を有するイオンを注入するステップをさらに含むことを特徴とする請求項2に記載の方法。 - 前記イオン注入領域は、前記チャネル層内に少なくとも部分的に延在することを特徴とする請求項3に記載の方法。
- 前記イオンを注入するステップは、前記保護層および前記障壁層にイオン注入領域を形成するために、前記マスクによって、前記第1の伝導型を有するイオンを前記保護層および前記障壁層に注入するステップを含み、
前記方法は、前記障壁層の前記イオン注入領域の少なくとも一部を露出させるために、前記マスクによって前記保護層をエッチングするステップをさらに含むことを特徴とする請求項2に記載の方法。 - 前記イオン注入領域は、前記チャネル層内に少なくとも部分的に延在することを特徴とする請求項5に記載の方法。
- 前記保護層は、高純度窒素(HPN)層を備えることを特徴とする請求項2に記載の方法。
- 前記HPN層は、約50から約150nmまでの厚さを有することを特徴とする請求項7に記載の方法。
- 前記HPN層は、約50から約150nmまでの厚さを有するHPNの層と、前記HPN層の上にあって、約100から約250nmまでの厚さを有する二酸化シリコン(SiO2)層とを備えることを特徴とする請求項7に記載の方法。
- 前記オーミックコンタクトは、少なくとも1つの耐熱性金属を含むことを特徴とする請求項1に記載の方法。
- 前記耐熱性金属は、Ti、TiW、Mo、Ta、W、WSi、Re、Nb、TiWN、NiSiおよび/またはTiSiを含むことを特徴とする請求項10に記載の方法。
- 前記オーミックコンタクトは、前記イオン注入領域と自己整合されていることを特徴とする請求項1に記載の方法。
- 前記第1の伝導型は、n型伝導性を含むことを特徴とする請求項1に記載の方法。
- 前記イオンを注入するステップは、シリコン・イオンを注入するステップを含むことを特徴とする請求項13に記載の方法。
- 前記アニールするステップは、前記イオン注入領域および前記金属層を少なくとも約950℃の温度でアニールするステップを含むことを特徴とする請求項1に記載の方法。
- 前記半導体デバイスは、III族窒化物半導体デバイスを含むことを特徴とする請求項1に記載の方法。
- III族窒化物半導体デバイスを形成する方法であって、
半導体基板の上に半導体層を形成するステップと、
前記半導体層内に複数の高濃度ドープのイオン注入領域を設けるために、前記半導体層内に選択的にイオンを注入するステップと、
前記半導体層内の前記複数の高濃度ドープのイオン注入領域の上に耐熱性金属層を形成するステップと、
前記複数の高濃度ドープのイオン注入領域の注入されたイオンをそれぞれ活性化し、かつ前記イオン注入領域上にあって、前記イオン注入領域に自己整合したオーミックコンタクトを形成するために、前記複数の高濃度ドープのイオン注入領域および前記耐熱性金属層を単一工程でアニールするステップと
を含むことを特徴とする方法。 - 前記半導体層を形成するステップは、
前記半導体基板の上にチャネル層を形成するステップと、
前記チャネル層の上に障壁層を形成するステップと、
前記障壁層の上に保護層を形成するステップと
を含むことを特徴とする請求項17に記載の方法。 - 前記保護層の上にマスクを形成するステップをさらに含み、
前記選択的にイオンを注入するステップは、前記マスクによって前記半導体層内へ選択的にイオンを注入するステップを含み、
前記耐熱性金属層を形成するステップは、前記マスクによって、前記半導体層内の前記複数の高濃度ドープのイオン注入領域の上に耐熱性金属層を形成するステップをさらに含むことを特徴とする請求項18に記載の方法。 - 前記選択的にイオンを注入するステップは、前記障壁層の表面の少なくとも一部を露出させるために、前記マスクによって前記保護層をエッチングするステップに先行され、
前記選択的にイオンを注入するステップは、前記障壁層の上にイオン注入領域を形成するために、前記マスクによって前記障壁層へ第1の伝導型を有するイオンを選択的に注入するステップをさらに含むことを特徴とする請求項19に記載の方法。 - 前記イオン注入領域は、前記チャネル層内に少なくとも部分的に延在することを特徴とする請求項20に記載の方法。
- 前記選択的にイオンを注入するステップは、前記保護層および前記障壁層にイオン注入領域を形成するために、前記マスクによって前記保護層および前記障壁層に前記第1の伝導型を有するイオンを選択的に注入するステップを含み、
前記方法は、前記障壁層の前記イオン注入領域の少なくとも一部を露出させるように、前記マスクによって前記保護層をエッチングするステップをさらに含むことを特徴とする請求項19に記載の方法。 - 前記イオン注入領域は、前記チャネル層内に少なくとも部分的に延在することを特徴とする請求項22に記載の方法。
- 前記保護層は、高純度窒素(HPN)層を備えることを特徴とする請求項18に記載の方法。
- 前記HPN層は、約50から約150nmまでの厚さを有することを特徴とする請求項24に記載の方法。
- 前記HPN層は、約50から約150nmまでの厚さを有するHPN層と、前記HPN層上にあって、約100から約250nmまでの厚さを有する二酸化シリコン(Si02)層とを備えることを特徴とする請求項24に記載の方法。
- 前記耐熱性金属は、Ti、TiW、Mo、Ta、W、WSi、Re、Nb、TiWN、NiSiおよび/またはTiSiを含むことを特徴とする請求項17に記載の方法。
- 前記注入されたイオンは、n型伝導性イオンを含むことを特徴とする請求項17に記載の方法。
- 前記n型伝導性イオンは、シリコン・イオンを含むことを特徴とする請求項28に記載の方法。
- 前記アニールするステップは、少なくとも約950℃の温度で前記イオン注入領域および前記耐熱性金属層をアニールするステップを含むことを特徴とする請求項17に記載の方法。
- III族窒化物半導体層と、
前記III族窒化物半導体層中の、離隔された複数の高濃度ドープのイオン注入領域と、
前記複数の高濃度ドープのイオン注入領域の上の耐熱性金属のオーミックコンタクトであって、前記オーミックコンタクトは前記複数の高濃度ドープのイオン注入領域と自己整合したオーミックコンタクトと
を備えることを特徴とするトランジスタデバイス。 - 前記離隔された複数の高濃度ドープのイオン注入領域は、前記トランジスタのソース領域およびドレイン領域をそれぞれ画定することを特徴とする請求項31に記載のトランジスタ。
- 前記III族窒化物半導体層は、
前記半導体基板の上のチャネル層と、
前記チャネル層の上の障壁層と、
前記障壁層の上の保護層と
を備えることを特徴とする請求項31に記載のトランジスタ。 - 前記保護層は、前記障壁層の表面の少なくとも一部を露出させる窓をその内部に画定し、
前記イオン注入領域は、前記障壁層内に設けられていることを特徴とする請求項33に記載のトランジスタ。 - 前記イオン注入領域は、前記チャネル層内に少なくとも部分的に延在することを特徴とする請求項34に記載のトランジスタ。
- 前記保護層は、高純度窒素(HPN)層を含むことを特徴とする請求項33に記載のトランジスタ。
- 前記HPN層は、約50から約150nmまでの厚さを有することを特徴とする請求項36に記載のトランジスタ。
- 前記HPN層は、約50から約150nmまでの厚さを有するHPNの層と、前記HPN層の上にあって、約100から約250nmまでの厚さを有する二酸化シリコン(Si02)層とを備えることを特徴とする請求項36に記載のトランジスタ。
- 前記耐熱性金属は、Ti、TiW、Mo、Ta、W、WSi、Re、Nb、TiWN、NiSiおよび/またはTiSiを含むことを特徴とする請求項31に記載のトランジスタ。
- 前記複数の高濃度ドープのイオン注入領域は、n型伝導性イオン注入領域を備えることを特徴とする請求項31に記載のトランジスタ。
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JP2000340581A (ja) * | 1999-05-31 | 2000-12-08 | Sony Corp | 半導体装置およびその製造方法 |
JP2005116858A (ja) * | 2003-10-09 | 2005-04-28 | Furukawa Electric Co Ltd:The | 半導体電子デバイス及び半導体電子デバイスの製造方法 |
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JP2009283915A (ja) * | 2008-05-09 | 2009-12-03 | Cree Inc | 浅いイオン注入された領域を含む半導体デバイスとその形成方法 |
US9711633B2 (en) | 2008-05-09 | 2017-07-18 | Cree, Inc. | Methods of forming group III-nitride semiconductor devices including implanting ions directly into source and drain regions and annealing to activate the implanted ions |
JP2018101755A (ja) * | 2016-12-22 | 2018-06-28 | 三菱電機株式会社 | ヘテロ接合電界効果型トランジスタおよびその製造方法 |
Also Published As
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US20070269968A1 (en) | 2007-11-22 |
KR20090018956A (ko) | 2009-02-24 |
EP2018663B1 (en) | 2018-09-26 |
TWI433240B (zh) | 2014-04-01 |
JP5730481B2 (ja) | 2015-06-10 |
CA2651670C (en) | 2015-06-30 |
EP2018663A1 (en) | 2009-01-28 |
TW200809981A (en) | 2008-02-16 |
US9040398B2 (en) | 2015-05-26 |
CA2651670A1 (en) | 2007-11-29 |
KR101410170B1 (ko) | 2014-06-19 |
WO2007136519A1 (en) | 2007-11-29 |
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