JP6320459B2 - フォトカプラ - Google Patents
フォトカプラ Download PDFInfo
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- JP6320459B2 JP6320459B2 JP2016116246A JP2016116246A JP6320459B2 JP 6320459 B2 JP6320459 B2 JP 6320459B2 JP 2016116246 A JP2016116246 A JP 2016116246A JP 2016116246 A JP2016116246 A JP 2016116246A JP 6320459 B2 JP6320459 B2 JP 6320459B2
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- stacked body
- photocoupler
- opk
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- 239000004065 semiconductor Substances 0.000 claims description 44
- 238000010521 absorption reaction Methods 0.000 claims description 32
- 239000000758 substrate Substances 0.000 claims description 25
- 230000005540 biological transmission Effects 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 16
- 238000011156 evaluation Methods 0.000 claims description 7
- 238000002161 passivation Methods 0.000 claims description 5
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910001218 Gallium arsenide Inorganic materials 0.000 claims description 4
- 238000005286 illumination Methods 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052732 germanium Inorganic materials 0.000 claims description 2
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 2
- 238000011161 development Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 229910052785 arsenic Inorganic materials 0.000 description 2
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910000980 Aluminium gallium arsenide Inorganic materials 0.000 description 1
- 229910000530 Gallium indium arsenide Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000295 emission spectrum Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000003631 wet chemical etching Methods 0.000 description 1
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Description
Claims (16)
- 送信モジュール(S)及び受信モジュール(EM)を有するフォトカプラ(OPK)であって、
前記送信モジュール(S)と前記受信モジュール(EM)とは、互いに電気的に分離されており、且つ、互いに光学的に結合されており、前記送信モジュール(S)と前記受信モジュール(EM)とは、1つの共通のハウジング内に集積されており、
前記受信モジュール(EM)は、
・電圧源のN個の部分電圧源であって、半導体ダイオードとして形成され互いに直列に接続されたN個の部分電圧源を有し、それぞれの前記部分電圧源は、pn接合部を備える1つの半導体ダイオード(D1,D2,D3,D4,D5)を有し、
前記半導体ダイオード(D1,D2,D3,D4,D5)は、p型ドープされたp型吸収層を有し、
前記半導体ダイオード(D1,D2,D3,D4,D5)は、n型吸収層を有し、前記n型吸収層は、前記n型吸収層のバンドギャップより大きいバンドギャップを有するn型ドープされたパッシベーション層によってパッシベーションされており、個々の前記部分電圧源の前記部分電源電圧同士の相違は、20%未満であり、それぞれ2つの連続する部分電圧源の間には、1つのトンネルダイオード(T1,T2,T3,T4)が形成されており、
前記トンネルダイオード(T1,T2,T3,T4)は、前記p/n型吸収層の前記バンドギャップより大きいバンドギャップを有する複数の半導体層を有し、前記より大きいバンドギャップを有する前記半導体層は、それぞれ前記半導体ダイオード(D1,D2,D3,D4,D5)の前記p/n型吸収層に対して変更された化学量論量及び/又は前記p/n型吸収層とは異なる元素組成を有する材料からなり、
・前記部分電圧源と前記トンネルダイオード(T1,T2,T3,T4)とは、一緒にモノリシックに集積されており、且つ、表側及び裏側を備える第1積層体(ST1)を一緒に形成しており、前記部分電圧源の個数Nは、3以上であり、
・前記第1積層体(ST1)上において、前記第1積層体(ST1)の前記表側の表面(OB)に光(L)が入射し、前記第1積層体(ST1)の前記表側において照明される前記表面(OB)の大きさは、前記第1積層体(ST1)の前記表側の面積の大きさにほぼ又は少なくとも相当し、
前記第1積層体(ST1)の全体厚さは、12μm未満であり、
・300Kにおいて、前記第1積層体(ST1)に光(L)が照射されている場合には、前記第1積層体(ST1)は、3Vより大きい電源電圧(VQ1)を有し、前記第1積層体(ST1)の前記表側から前記第1積層体(ST1)の前記裏側への光入射方向において、1つの半導体ダイオードの前記p型吸収層及び前記n型吸収層の全体厚さは、最も上にあるダイオード(D1)から最も下にあるダイオード(D3〜D5)へと増加していき、前記半導体ダイオード(D1,D2,D3,D4,D5)の各p型吸収層は、前記p型吸収層のバンドギャップより大きいバンドギャップを有するp型ドープされたパッシベーション層によってパッシベーションされており、
前記電圧源は、前記第1積層体(ST1)の前記裏側の近傍において、周囲を取り囲むテラス状の縁部を有し、
前記第1積層体(ST1)は、基板(SUB)上に配置されており、
前記基板(SUB)の表側(OS)が、前記第1積層体(ST1)の前記裏側の面積より大きい表面を有することにより、段差(STU)が形成される、
ことを特徴とするフォトカプラ(OPK)。 - 前記受信モジュール(EM)の前記部分電圧源の前記部分電源電圧同士の相違は、10%未満である、
請求項1記載のフォトカプラ(OPK)。 - 前記受信モジュール(EM)の前記半導体ダイオード(D1,D2,D3,D4,D5)は、それぞれ同じ半導体材料を有する、
請求項1又は2記載のフォトカプラ(OPK)。 - 前記基板(SUB)は、半導体材料を含む、
請求項1から3のいずれか1項に記載のフォトカプラ(OPK)。 - 前記第1積層体(ST1)の底面積は、2mm2未満、又は1mm2未満である、
請求項1から4のいずれか1項に記載のフォトカプラ(OPK)。 - 前記受信モジュール(EM)の前記第1積層体(ST1)の前記表側には、前記縁部の近傍における周囲を取り囲む金属製コンタクトとして、又は、前記縁部(R)における個別のコンタクト面(K1)として、第1電圧端子(VSUP)が形成されている、
請求項1から5のいずれか1項に記載のフォトカプラ(OPK)。 - 前記受信モジュール(EM)の前記第1積層体(ST1)の前記裏側に、第2電圧端子(VSUP2)が形成されている、
請求項1から6のいずれか1項に記載のフォトカプラ(OPK)。 - 前記受信モジュール(EM)の前記第2電圧端子(VSUP2)は、前記基板によって形成されている、
請求項7記載のフォトカプラ(OPK)。 - 前記受信モジュール(EM)内に、第2積層体(ST2)が形成されており、
前記第1積層体(ST1)と前記第2積層体(ST2)とは、1つの共通の支持体上に互いに隣り合って配置されており、
前記第1積層体(ST1)と前記第2積層体(ST2)とは、互いに直列に接続されており、これによって、前記第1積層体(ST1)の電源電圧(VQ1)と前記第2積層体(ST2)の電源電圧(VQ2)とが合計される、
請求項1から8のいずれか1項に記載のフォトカプラ(OPK)。 - 前記受信モジュール(EM)の各前記ダイオードの前記p型吸収層と前記n型吸収層との間に、真性層が形成されている、
請求項1から9のいずれか1項に記載のフォトカプラ(OPK)。 - 前記受信モジュール(EM)の半導体材料及び/又は基板は、III−V材料からなる、
請求項1から10のいずれか1項に記載のフォトカプラ(OPK)。 - 前記受信モジュール(EM)の基板は、ゲルマニウム又はガリウムヒ素を含む、
請求項1から11のいずれか1項に記載のフォトカプラ(OPK)。 - 前記ハウジング内に、評価回路(AWE)が集積されており、
前記電圧源は、前記評価回路(AWE)に電気的に作用接続されている、
請求項1から12のいずれか1項に記載のフォトカプラ(OPK)。 - 前記受信モジュール(EM)の前記第1積層体(ST1)の最も下にある半導体ダイオードの下に、半導体ミラーが形成されている、
請求項1から13のいずれか1項に記載のフォトカプラ(OPK)。 - 前記受信モジュール(EM)の前記第1積層体(ST1)の前記半導体層は、ヒ化物含有層とリン化物含有層とを同時に含む、
請求項1から14のいずれか1項に記載のフォトカプラ(OPK)。 - 前記縁部のエッジは、前記積層体の直接隣接する側面から少なくとも5μm、最大で500μmだけ離間している、
請求項1から15のいずれか1項に記載のフォトカプラ(OPK)。
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