JP2022513216A - 電界抑制が向上させられた高電圧半導体装置 - Google Patents
電界抑制が向上させられた高電圧半導体装置 Download PDFInfo
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- JP2022513216A JP2022513216A JP2021533644A JP2021533644A JP2022513216A JP 2022513216 A JP2022513216 A JP 2022513216A JP 2021533644 A JP2021533644 A JP 2021533644A JP 2021533644 A JP2021533644 A JP 2021533644A JP 2022513216 A JP2022513216 A JP 2022513216A
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Abstract
Description
前記E-field抑制層と、
前記E-field抑制層の上方に少なくとも一部形成されるメタライゼーション層と
を備える、任意の前項に記載の半導体装置。
前記MOSFET素子の表面にわたって形成される1つまたは複数の隔離層と、
前記1つまたは複数の隔離層にわたって形成されるパターン形成された電界(E-field)抑制層であって、前記半導体装置が最大電圧以下で動作しているとき、前記E-field抑制層の上方の電界強度が隣接する材料の誘電強度未満となるように、前記MOSFET素子によって生成される電界強度を抑制するように構成されるパターン形成された電界(E-field)抑制層と
を備える半導体装置。
前記SiC基板に形成される終端領域と、
前記SiC基板に形成される金属接触領域と、
終端領域にわたって形成される電界(E-field)抑制層であって、前記E-field抑制層は、金属接触領域にわたる開口でパターン形成され、前記E-field抑制層は、前記半導体装置が最大電圧以下で動作しているとき、前記E-field抑制層の上方の電界強度が隣接する材料の誘電強度未満となるような厚さを備える、電界(E-field)抑制層と
を備える半導体装置。
12 電力源
14 電気負荷
16 半導体装置
18 制御装置
20 nチャネル炭化ケイ素金属酸化膜半導体電界効果トランジスタ、SiC MOSFET装置、SiC MOSFETダイ
22 半導体基板層、SiC基板層
24 半導体ドリフト層
26 ブロッキング接合部
28 接合終端領域、JTE領域
30 不動態層
32 誘電層
34 製作後の材料または環境、素子
36 E-field抑制層
40 モデルの結果
42 y軸
44 x軸
46 曲線
48、50、52 点
60 試験ウェーハ
62 ウェーハ60の一部分
64 ゲート金属
66 ソース金属パッド
70 電界
72 接合要素
74 メタライゼーション、POLメタライゼーション層
Claims (27)
- 終端領域にわたって形成される電界(E-field)抑制層であって、前記E-field抑制層は、金属接触領域にわたる開口でパターン形成され、前記E-field抑制層は、前記半導体装置が最大電圧以下で動作しているとき、前記E-field抑制層の上方の電界強度が隣接する材料の誘電強度未満となるような厚さを備える、電界(E-field)抑制層を備える半導体装置。
- 前記装置は、トランジスタ、ダイオード、MOSFET、JFET、IGBT、またはサイリスタを備える、請求項1に記載の半導体装置。
- 基板と、
前記基板に形成される半導体ドリフト層と、
前記ドリフト層に形成されるブロッキング接合部と、
前記半導体ドリフト層に形成され、前記ブロッキング接合部に横で隣接する接合終端領域と
をさらに備える、請求項1に記載の半導体装置。 - 前記基板または前記ドリフト層の少なくとも一方は炭化ケイ素(SiC)を含む、請求項3に記載の半導体装置。
- 前記最大電圧は900ボルトから10KVまでである、請求項1に記載の半導体装置。
- 前記E-field抑制層の下方に形成される不動態層をさらに備える、請求項1に記載の半導体装置。
- 前記不動態層にわたって、前記E-field抑制層の下方に形成される誘電層を備える、請求項6に記載の半導体装置。
- 前記E-field抑制層はおおよそ50μm~200μmの範囲で厚さを備える、請求項1に記載の半導体装置。
- 前記E-field抑制層は、ポリイミド、ポリベンゾオキサゾール(PBO)、エポキシ、ビスベンゾシクロブテン(BCB)、ポリエーテルイミド(Ultem)、ポリエーテルイミド、液体結晶ポリマー(LCP)、ポリスルホン、ポリエーテルエーテルケトン(PEEK)、ポリアリーレンエーテルケトン、フルオロポリマー、またはそれらの組み合わせを含む、請求項1に記載の半導体装置。
- 下にある接合領域を拡大するように構成されるパワーオーバーレイ(POL)構造を備え、前記POL構造は、
前記E-field抑制層と、
前記E-field抑制層の上方に少なくとも一部形成されるメタライゼーション層と
を備える、請求項1に記載の半導体装置。 - 前記メタライゼーション層は再メタライゼーション層である、請求項10に記載の半導体装置。
- 前記メタライゼーション層は前記開口へと延び、前記メタライゼーション層は、前記開口を通じて前記金属接触領域に電気的に結合される、請求項10に記載の半導体装置。
- 前記E-field抑制層は、乾燥膜の形態で適用可能な材料を含む、請求項1に記載の半導体装置。
- 金属酸化膜半導体電界効果トランジスタ(MOSFET)素子と、
前記MOSFET素子の表面にわたって形成される1つまたは複数の隔離層と、
前記1つまたは複数の隔離層にわたって形成されるパターン形成された電界(E-field)抑制層であって、前記半導体装置が最大電圧以下で動作しているとき、前記E-field抑制層の上方の電界強度が隣接する材料の誘電強度未満となるように、前記MOSFET素子によって生成される電界強度を抑制するように構成されるパターン形成された電界(E-field)抑制層と
を備える半導体装置。 - 前記1つまたは複数の隔離層は不動態層と誘電層とを備える、請求項14に記載の半導体装置。
- 前記E-field抑制層は、ポリイミド、ポリベンゾオキサゾール(PBO)、エポキシ、ビスベンゾシクロブテン(BCB)、ポリエーテルイミド(Ultem)、ポリエーテルイミド、液体結晶ポリマー(LCP)、ポリスルホン、ポリエーテルエーテルケトン(PEEK)、ポリアリーレンエーテルケトン、フルオロポリマー、またはそれらの組み合わせを含む、請求項14に記載の半導体装置。
- 前記E-field抑制層はおおよそ50μm~200μmの範囲で厚さを備える、請求項14に記載の半導体装置。
- 前記E-field抑制層は前記MOSFET素子の終端領域を覆い、前記E-field抑制層は、SiC MOSFET素子の下にあるゲートパッド、ソースパッド、またはそれら両方を露出させるようにパターン形成される、請求項14に記載の半導体装置。
- 前記E-field抑制層の上方に少なくとも一部配置され、前記SiC MOSFET素子の前記下にあるゲートパッド、前記ソースパッド、またはそれら両方に電気的に結合されるように、前記パターン形成されたE-field抑制層の開口へと延びるメタライゼーション層をさらに備える、請求項18に記載の半導体装置。
- 前記メタライゼーション層は、前記SiC MOSFET素子の前記下にあるゲートパッド、前記ソースパッド、またはそれら両方の領域より大きい領域を備える、請求項19に記載の半導体装置。
- 前記MOSFET素子は炭化ケイ素(SiC)を含む、請求項14に記載の半導体装置。
- 炭化ケイ素(SiC)基板と、
前記SiC基板に形成される終端領域と、
前記SiC基板に形成される金属接触領域と、
終端領域にわたって形成される電界(E-field)抑制層であって、前記E-field抑制層は、金属接触領域にわたる開口でパターン形成され、前記E-field抑制層は、前記半導体装置が最大電圧以下で動作しているとき、前記E-field抑制層の上方の電界強度が隣接する材料の誘電強度未満となるような厚さを備える、電界(E-field)抑制層と
を備える半導体装置。 - 前記E-field抑制層はおおよそ50μm~200μmの範囲で厚さを備える、請求項22に記載の半導体装置。
- 前記E-field抑制層はおおよそ80μm~100μmの範囲で厚さを備える、請求項22に記載の半導体装置。
- 前記E-field抑制層の上方に少なくとも一部形成されるメタライゼーション層を備える、請求項22に記載の半導体装置。
- 前記メタライゼーション層は前記開口へと延び、前記メタライゼーション層は、前記開口を通じて前記金属接触領域に電気的に結合される、請求項25に記載の半導体装置。
- 前記E-field抑制層は、ポリイミド、ポリベンゾオキサゾール(PBO)、エポキシ、ビスベンゾシクロブテン(BCB)、ポリエーテルイミド(Ultem)、ポリエーテルイミド、液体結晶ポリマー(LCP)、ポリスルホン、ポリエーテルエーテルケトン(PEEK)、ポリアリーレンエーテルケトン、フルオロポリマー、またはそれらの組み合わせを含む、請求項22に記載の半導体装置。
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