JP2005503675A5 - - Google Patents
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- Publication number
- JP2005503675A5 JP2005503675A5 JP2003529535A JP2003529535A JP2005503675A5 JP 2005503675 A5 JP2005503675 A5 JP 2005503675A5 JP 2003529535 A JP2003529535 A JP 2003529535A JP 2003529535 A JP2003529535 A JP 2003529535A JP 2005503675 A5 JP2005503675 A5 JP 2005503675A5
- Authority
- JP
- Japan
- Prior art keywords
- layer
- doped
- diode
- barrier
- schottky metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 229910052751 metal Inorganic materials 0.000 claims 15
- 239000002184 metal Substances 0.000 claims 15
- 239000000463 material Substances 0.000 claims 8
- 229910002601 GaN Inorganic materials 0.000 claims 7
- 239000004065 semiconductor Substances 0.000 claims 5
- 239000012535 impurity Substances 0.000 claims 4
- 239000011810 insulating material Substances 0.000 claims 3
- 230000000694 effects Effects 0.000 claims 2
- JMASRVWKEDWRBT-UHFFFAOYSA-N gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 claims 2
- 230000005641 tunneling Effects 0.000 claims 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims 2
- 229910004541 SiN Inorganic materials 0.000 claims 1
- 229910052804 chromium Inorganic materials 0.000 claims 1
- 230000002708 enhancing Effects 0.000 claims 1
- 229910052758 niobium Inorganic materials 0.000 claims 1
- 238000005381 potential energy Methods 0.000 claims 1
- 229910052715 tantalum Inorganic materials 0.000 claims 1
- 229910052718 tin Inorganic materials 0.000 claims 1
- 229910052719 titanium Inorganic materials 0.000 claims 1
- 229910052721 tungsten Inorganic materials 0.000 claims 1
- 239000011787 zinc oxide Substances 0.000 claims 1
Claims (14)
- n+GaN層(42)と、
前記n+GaN層(42)上のn−GaN層(44)と、
仕事関数を有する前記n−GaN層(44)上のショットキー金属層(48)であって、前記n−GaN層(44)は前記ショットキー金属(48)と共に接合を形成し、前記接合は、障壁ポテンシャルのエネルギー準位(33)を有するショットキー金属層(48)と、
前記n−GaN層(44)の表面上のトレンチ構造(45)であって、前記ダイオードは逆バイアス下で逆漏れ電流を受け、逆漏れ電流の量を低減するトレンチ構造(45)と
を備えたことを特徴とするIII族窒化物ベースのダイオード。 - 前記障壁ポテンシャル(33)は、前記ショットキー金属の仕事関数に依存することを特徴とする請求項1に記載のダイオード。
- 前記n−GaN層(44)は電子親和力を有し、前記障壁ポテンシャル(33)は前記ショットキー金属仕事関数から前記電子親和力を引いた差にほぼ等しいことを特徴とする請求項1に記載のダイオード。
- 前記ショットキー金属層(48)は、Ti、Cr、Nb、Sn、W、およびTaを含む金属グループのうちの1つであることを特徴とする請求項1に記載のダイオード。
- 前記トレンチ構造(45)は、隣接するトレンチ(46)間にメサ領域(49)を有する複数のトレンチ(46)を含み、前記トレンチ(46)は、絶縁材料(47)で被覆された側壁(46a)および底面(46b)を有し、前記ショットキー金属層(48)は、前記トレンチ(46)およびメサ領域(49)を覆い、前記絶縁材料(47)は、前記ショットキー金属層(48)と前記側壁(46a)および底面(46b)との間に挟まれることを特徴とする請求項1に記載のダイオード。
- 前記絶縁材料(47)はSiNであることを特徴とする請求項5に記載のダイオード。
- 高濃度に不純物を添加された窒化ガリウム半導体材料(42)の層と、
前記高濃度に不純物を添加された半導体材料(42)に隣接する、ピン止めを緩められた表面ポテンシャルを有する、より低濃度に不純物を添加された窒化ガリウム半導体材料(44)の層と、
前記より低濃度に不純物を添加された半導体材料(42)上のショットキー金属層(48)であって、前記より低濃度に不純物を添加された半導体材料(42)は、ショットキー金属(48)の種類に依存する障壁ポテンシャルエネルギー(33)準位を有するショットキー金属(48)と共に接合を形成し、前記障壁ポテンシャルは、前記ダイオードが低順電圧ダイオードとして動作可能な大きさであり、前記ダイオードは逆バイアス下で逆漏れ電流を受けるショットキー金属層(48)と、
前記逆漏れ電流の量を低減する手段と
を備えたことを特徴とするダイオード。 - n+に不純物を添加された層(52)と、
前記n+に不純物を添加された層(52)に隣接するn−に不純物を添加された層(53)と、
前記n+に不純物を添加された層(52)と反対側の、前記n−に不純物を添加された層(53)に隣接する障壁層(54)と、
前記n−に不純物を添加された層(53)の反対側の、前記障壁層(54)上の金属層(56)であって、前記n−に不純物を添加された層(53)は、前記障壁層(54)と共に障壁ポテンシャル(81)を有する接合を形成し、前記障壁ポテンシャル(81)により、順バイアス下で前記障壁ポテンシャル(81)を通過する電子トンネル効果の結果としてダイオードのオン状態電圧が低くなる金属層(56)と
を備えたことを特徴とするトンネルダイオード。 - 前記障壁層(54)は、電子トンネル効果を高めることによって前記ダイオードのオン状態電圧を低下させる圧電双極子を有することを特徴とする請求項8に記載のダイオード。
- 前記圧電双極子の数は、前記障壁層の厚さが増大するにつれて増加し、一方なおトンネル効果電流が可能であることを特徴とする請求項8に記載のダイオード。
- 前記n+に不純物を添加された層(52)、n−に不純物を添加された層(53)、および障壁層(54)は、極性材料を含むことを特徴とする請求項8に記載のダイオード。
- 前記n+に不純物を添加された層(52)、n−に不純物を添加された層(53)、および障壁層(54)は、極性材料または非極性材料、あるいはそれらの組合せから形成されることを特徴とする請求項8に記載のダイオード。
- 前記n+に不純物を添加された層(52)、n−に不純物を添加された層(53)、および障壁層(54)は、酸化亜鉛などの二元極性酸化物から形成されることを特徴とする請求項8に記載のダイオード。
- 前記障壁およびn−に不純物を添加された層(123、124)内にトレンチ(121)構造をさらに備え、逆バイアス下で逆漏れ電流を受け、前記トレンチ構造(121)は、前記逆漏れ電流の量を低減することを特徴とする請求項8に記載のダイオード。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/911,155 US20030015708A1 (en) | 2001-07-23 | 2001-07-23 | Gallium nitride based diodes with low forward voltage and low reverse current operation |
US09/911,155 | 2001-07-23 | ||
PCT/US2002/021702 WO2003026021A2 (en) | 2001-07-23 | 2002-07-08 | Gallium nitride based diodes with low forward voltage and low reverse current operation |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2008264568A Division JP5032436B2 (ja) | 2001-07-23 | 2008-10-10 | トンネルダイオード |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2005503675A JP2005503675A (ja) | 2005-02-03 |
JP2005503675A5 true JP2005503675A5 (ja) | 2007-02-08 |
JP4874518B2 JP4874518B2 (ja) | 2012-02-15 |
Family
ID=25429819
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003529535A Expired - Lifetime JP4874518B2 (ja) | 2001-07-23 | 2002-07-08 | 低順電圧で低逆電流の動作特性を有する窒化ガリウムベースのダイオード |
JP2008264568A Expired - Lifetime JP5032436B2 (ja) | 2001-07-23 | 2008-10-10 | トンネルダイオード |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2008264568A Expired - Lifetime JP5032436B2 (ja) | 2001-07-23 | 2008-10-10 | トンネルダイオード |
Country Status (9)
Country | Link |
---|---|
US (4) | US20030015708A1 (ja) |
EP (2) | EP1410445B1 (ja) |
JP (2) | JP4874518B2 (ja) |
KR (1) | KR100917699B1 (ja) |
CN (2) | CN100373634C (ja) |
AT (1) | ATE515803T1 (ja) |
CA (1) | CA2454310C (ja) |
TW (1) | TW564486B (ja) |
WO (1) | WO2003026021A2 (ja) |
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