JP2018186126A - 半導体装置、半導体装置の製造方法、インバータ回路、駆動装置、車両、及び、昇降機 - Google Patents
半導体装置、半導体装置の製造方法、インバータ回路、駆動装置、車両、及び、昇降機 Download PDFInfo
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- JP2018186126A JP2018186126A JP2017085422A JP2017085422A JP2018186126A JP 2018186126 A JP2018186126 A JP 2018186126A JP 2017085422 A JP2017085422 A JP 2017085422A JP 2017085422 A JP2017085422 A JP 2017085422A JP 2018186126 A JP2018186126 A JP 2018186126A
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Abstract
【解決手段】実施形態の半導体装置は、金属層と、n型の第1の炭化珪素領域と、金属層と第1の炭化珪素領域との間に位置し、ニッケル(Ni)、パラジウム(Pd)、及び、白金(Pt)から成る群から選ばれる少なくとも一つの元素を含む金属の第2の炭化珪素領域と、を備える。
【選択図】図1
Description
本実施形態の半導体装置は、金属層と、n型の第1の炭化珪素領域と、金属層と第1の炭化珪素領域との間に位置し、ニッケル(Ni)、パラジウム(Pd)、及び、白金(Pt)から成る群から選ばれる少なくとも一つの元素を含む金属の第2の炭化珪素領域と、を備える。
本実施形態の半導体装置は、第1の電極と、第2の電極と、第1の電極と第2の電極との間に位置する第1の炭化珪素領域と、第1の炭化珪素領域と第2の電極との間に位置し、第1の炭化珪素領域よりもn型不純物の不純物濃度の高いn型の第2の炭化珪素領域と、第2の炭化珪素領域と第2の電極との間に位置し、ニッケル(Ni)、パラジウム(Pd)、及び、白金(Pt)から成る群から選ばれる少なくとも一つの元素を含む金属の第3の炭化珪素領域と、を備える。
本実施形態の半導体装置は、MPS(Merged PiN Schottcky)ダイオードである点で、第2の実施形態と異なっている。裏面電極の構成及びその製造方法については、第2の実施形態と同様である。したがって、第2の実施形態と重複する内容については記述を省略する。
本実施形態のインバータ回路及び駆動装置は、第2の実施形態の半導体装置を備える駆動装置である。
本実施形態の車両は、第2の実施形態の半導体装置を備える車両である。
本実施形態の車両は、第2の実施形態の半導体装置を備える車両である。
本実施形態の昇降機は、第2の実施形態の半導体装置を備える昇降機である。
14 ドレイン電極(第2の電極)
22 ドレイン領域(第2の炭化珪素領域)
24 ドリフト領域(第1の炭化珪素領域)
30 金属領域(第3の炭化珪素領域)
52 アノード電極(第1の電極)
54 カソード電極(第2の電極)
62 カソード領域(第2の炭化珪素領域)
64 ドリフト領域(第1の炭化珪素領域)
70 金属領域(第3の炭化珪素領域)
100 MOSFET(半導体装置)
110 炭化珪素層
112 金属電極(金属層)
114 p型領域
116 n型領域(第1の炭化珪素領域)
118 金属領域(第2の炭化珪素領域)
120 層間絶縁層
150 インバータ回路
200 MPSダイオード(半導体装置)
300 駆動装置
400 車両
500 車両
600 昇降機
Claims (20)
- 金属層と、
n型の第1の炭化珪素領域と、
前記金属層と前記第1の炭化珪素領域との間に位置し、ニッケル(Ni)、パラジウム(Pd)、及び、白金(Pt)から成る群から選ばれる少なくとも一つの元素を含む金属の第2の炭化珪素領域と、
を備える半導体装置。 - 前記少なくとも一つの元素は、炭化珪素の結晶構造の炭素サイトに存在する請求項1記載の半導体装置。
- 前記第2の炭化珪素領域は、炭化珪素の結晶構造の炭素サイトに存在するシリコン(Si)を含む請求項1又は請求項2記載の半導体装置。
- 前記少なくとも一つの元素の前記第2の炭化珪素領域の中の濃度は、1×1019cm−3以上5×1022cm−3以下である請求項1ないし請求項3いずれか一項記載の半導体装置。
- 前記第2の炭化珪素領域の厚さは、0.01μm以上1.0μm以下である請求項1ないし請求項4いずれか一項記載の半導体装置。
- 前記第2の炭化珪素領域のシート抵抗が0.5Ω/□以下である請求項1ないし請求項5いずれか一項記載の半導体装置。
- 前記第2の炭化珪素領域の仕事関数が3.7eV以下である請求項1ないし請求項6いずれか一項の半導体装置。
- 第1の電極と、
第2の電極と、
前記第1の電極と前記第2の電極との間に位置する第1の炭化珪素領域と、
前記第1の炭化珪素領域と前記第2の電極との間に位置し、前記第1の炭化珪素領域よりもn型不純物の不純物濃度の高いn型の第2の炭化珪素領域と、
前記第2の炭化珪素領域と前記第2の電極との間に位置し、ニッケル(Ni)、パラジウム(Pd)、及び、白金(Pt)から成る群から選ばれる少なくとも一つの元素を含む金属の第3の炭化珪素領域と、
を備える半導体装置。 - 前記少なくとも一つの元素は、炭化珪素の結晶構造の炭素サイトに存在する請求項8記載の半導体装置。
- 前記第3の炭化珪素領域は、炭化珪素の結晶構造の炭素サイトに存在するシリコン(Si)を含む請求項8又は請求項9記載の半導体装置。
- 前記少なくとも一つの元素の前記第3の炭化珪素領域の中の濃度は、1×1019cm−3以上5×1022cm−3以下である請求項8ないし請求項10いずれか一項記載の半導体装置。
- 前記第3の炭化珪素領域の厚さは、0.01μm以上1.0μm以下である請求項8ないし請求項11いずれか一項記載の半導体装置。
- 前記第3の炭化珪素領域のシート抵抗が0.5Ω/□以下である請求項8ないし請求項12いずれか一項記載の半導体装置。
- 前記第3の炭化珪素領域の仕事関数が3.7eV以下である請求項8ないし請求項13いずれか一項の半導体装置。
- 請求項8ないし請求項14いずれか一項記載の半導体装置を備えるインバータ回路。
- 請求項8ないし請求項14いずれか一項記載の半導体装置を備える駆動装置。
- 請求項8ないし請求項14いずれか一項記載の半導体装置を備える車両。
- 請求項8ないし請求項14いずれか一項記載の半導体装置を備える昇降機。
- n型の第1の炭化珪素領域に、ニッケル(Ni)、パラジウム(Pd)、及び、白金(Pt)から成る群から選ばれる少なくとも一つの元素をイオン注入し、
前記少なくとも一つの元素をイオン注入した後に熱処理を行い、前記少なくとも一つの元素が注入された領域を金属化して金属の第2の炭化珪素領域を形成し、
前記第2の炭化珪素領域の上に金属層を形成する半導体装置の製造方法。 - 前記熱処理の前に、前記第1の炭化珪素領域の前記少なくとも一つの元素をイオン注入する領域に、シリコン(Si)をイオン注入する請求項19記載の半導体装置の製造方法。
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