JP2014534632A - 凹型電極構造を有する半導体装置 - Google Patents
凹型電極構造を有する半導体装置 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 219
- 230000005669 field effect Effects 0.000 claims abstract description 69
- 239000000463 material Substances 0.000 claims description 35
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- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 2
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- 150000004767 nitrides Chemical class 0.000 abstract description 10
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- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 229910002601 GaN Inorganic materials 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 238000001312 dry etching Methods 0.000 description 4
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- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 3
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- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 2
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- RNQKDQAVIXDKAG-UHFFFAOYSA-N aluminum gallium Chemical compound [Al].[Ga] RNQKDQAVIXDKAG-UHFFFAOYSA-N 0.000 description 2
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- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- AJGDITRVXRPLBY-UHFFFAOYSA-N aluminum indium Chemical compound [Al].[In] AJGDITRVXRPLBY-UHFFFAOYSA-N 0.000 description 1
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- 238000005229 chemical vapour deposition Methods 0.000 description 1
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- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
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- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
Claims (31)
- ソース領域と、
ドレイン領域と、
前記ソース領域及び前記ドレイン領域間に位置するとともに、前記ソース領域及び前記ドレイン領域間に延びる方向に沿って延出する溝を有する半導体領域と、
前記溝内に形成された導電領域を有するとともに、前記ソース領域及び前記ドレイン領域間の距離の部分だけに延出する導電電極と、
前記半導体領域及び前記導電電極間であって、少なくとも部分的に前記半導体領域及び前記導電電極間の境界面に亘って延出する絶縁領域と、を含む電界効果トランジスタ。 - 請求項1に記載の電界効果トランジスタにおいて、
前記第1の半導体領域は、III−N族半導体材料を含む電界効果トランジスタ。 - 請求項2に記載の電界効果トランジスタにおいて、
前記III−N族半導体材料はGaNを含む電界効果トランジスタ。 - 請求項1に記載の電界効果トランジスタにおいて、
前記半導体領域は第1の半導体領域であって、
前記電界効果トランジスタは、さらに前記第1の半導体領域及び前記絶縁領域及び/又は導電電極間に第2の半導体領域を含む電界効果トランジスタ。 - 請求項4に記載の電界効果トランジスタにおいて、
前記第1の半導体領域は第1のIII−N族半導体材料を含み、
前記第2の半導体領域は第2のIII−N族半導体材料を含み、
前記第1のIII−N族半導体材料は前記第2のIII−N族半導体材料のバンドギャップと異なるバンドギャップを有する電界効果トランジスタ。 - 請求項1に記載の電界効果トランジスタにおいて、
前記第1の半導体領域及び前記第2の半導体領域のうちの少なくともいずれか一方は複数の半導体層を含む電界効果トランジスタ。 - 請求項1に記載の電界効果トランジスタにおいて、
前記導電電極は、前記電界効果トランジスタのゲートを形成する電界効果トランジスタ。 - 請求項1に記載の電界効果トランジスタにおいて、
前記導電電極は、前記電界効果トランジスタのフィールドプレートを形成する電界効果トランジスタ。 - 請求項1に記載の電界効果トランジスタにおいて、
前記電界効果トランジスタはノーマリーオフゲート領域を有するエンハンスメントモード電界効果トランジスタである電界効果トランジスタ。 - 請求項1に記載の電界効果トランジスタにおいて、
前記電界効果トランジスタは、前記電界効果トランジスタがオフ状態にあるとき、100Vより大きい電圧を阻止するように形成される電界効果トランジスタ。 - 請求項1に記載の電界効果トランジスタにおいて、
前記電界効果トランジスタのゲートは少なくとも60ナノメートルの長さを有し、
前記長さは、前記ソース及び前記ドレイン間に延びる方向に沿って延出する電界効果トランジスタ。 - 請求項1に記載の電界効果トランジスタにおいて、
前記溝は第1の溝であって、
前記導電電極は第1の導電電極であって、
前記半導体領域は、その中に形成された第2の溝を有し、
前記電界効果トランジスタは、さらに前記第2の溝内に形成された導電領域を有する第2の導電電極を含む電界効果トランジスタ。 - 請求項1に記載の電界効果トランジスタにおいて、
前記電界効果トランジスタはボディダイオードを有し、
前記導電電極は、前記ボディダイオードのアノードを形成し、
前記ボディダイオードのアノードは、前記電界効果トランジスタのゲート及び前記ドレイン領域間に位置され、
前記アノードは、電気的に前記ソース領域に接続される電界効果トランジスタ。 - ダイオードであって、
自身の中に形成される溝を有する半導体領域と、
前記ダイオードのアノードを形成し、前記半導体領域の前記溝内に形成される導通領域を有する導電電極と、を含むダイオード。 - 請求項14に記載のダイオードにおいて、
前記半導体領域はIII−N族半導体材料を含むダイオード。 - 請求項15に記載のダイオードにおいて、
前記III−N族半導体材料はGaNを含むダイオード。 - 請求項14に記載のダイオードにおいて、
前記半導体領域は、第1の半導体領域であって、
前記ダイオードは、さらに前記第1の半導体領域及び前記導電電極間の第2の半導体領域を含むダイオード。 - 請求項17に記載のダイオードにおいて、
前記第1の半導体領域及び第2の半導体領域のうちの少なくとも一方は、複数の半導体層を含むダイオード。 - 請求項14に記載のダイオードにおいて、
前記導電電極は金属又は合金を含むダイオード。 - 請求項14に記載のダイオードにおいて、
前記ダイオードは、さらに、前記半導体領域及び前記導電電極間に絶縁領域を含み、
前記絶縁領域は、少なくとも部分的に前記半導体領域及び前記導電電極間の境界面に亘って延出するダイオード。 - 請求項20に記載のダイオードにおいて、
前記半導体領域の第1の部分は前記導電電極とともにショットキー接触を形成し、
前記半導体領域の第2の部分は前記絶縁領域によって前記導電電極から分離されているダイオード。 - III−N族半導体材料を含み、自身の中に形成された溝を有する半導体領域と、
前記半導体領域の前記溝の中に形成された導電領域を含む導電電極と、
前記半導体領域及び前記導電電極間に位置するとともに、少なくとも部分的に前記半導体領域及び前記導電電極間の境界面に亘って延出する絶縁領域と、を含む半導体構造体。 - 請求項22に記載の半導体構造体において、
前記III−N族半導体材料はGaNを含む半導体構造体。 - 請求項22に記載の半導体構造体において、
前記半導体領域は第1の半導体領域であって、
前記半導体構造体は、さらに前記第1の半導体領域及び前記導電電極間であって、第2のIII−N族半導体材料を含む第2の半導体領域を含む半導体構造体。 - 請求項24に記載の半導体構造体において、
前記第1の半導体領域はGaNを含み、
前記第2の半導体領域はAlInGaNを含む半導体構造体。 - 請求項24に記載の半導体構造体において、
前記導電電極は金属を含む半導体構造体。 - III−N族半導体材料を含む半導体領域に溝を形成することと、
少なくとも半導体領域の一部を覆う絶縁領域を形成することと、
前記半導体領域の前記溝において導電電極を形成することと、を含み、
前記絶縁領域は少なくとも部分的に前記半導体領域及び前記導電電極間の境界面に亘って延出する半導体構造体の製造方法。 - 請求項27に記載の半導体構造体の製造方法において、
前記III−N族半導体材料はGaNを含む半導体構造体の製造方法。 - 請求項27に記載の半導体構造体の製造方法において、
前記溝は互いに平行に形成される半導体構造体の製造方法。 - 請求項27に記載の半導体構造体の製造方法において、
さらに、前記半導体領域における電界効果トランジスタのノーマリーオフゲート領域を形成することを含む半導体構造体の製造方法。 - 請求項27に記載の半導体構造体の製造方法において、
ノーマリーオフゲート領域を形成することは、
前記半導体領域の一部を取り除くこと及び/又は前記半導体領域を変更することを含む半導体構造体の製造方法。
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