JP4920319B2 - 半導体素子の寿命予測回路 - Google Patents
半導体素子の寿命予測回路 Download PDFInfo
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- JP4920319B2 JP4920319B2 JP2006172280A JP2006172280A JP4920319B2 JP 4920319 B2 JP4920319 B2 JP 4920319B2 JP 2006172280 A JP2006172280 A JP 2006172280A JP 2006172280 A JP2006172280 A JP 2006172280A JP 4920319 B2 JP4920319 B2 JP 4920319B2
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- 239000004065 semiconductor Substances 0.000 title claims description 18
- 238000001514 detection method Methods 0.000 claims description 16
- 230000006866 deterioration Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 230000035882 stress Effects 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
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Description
図1に本発明の第1実施形態の寿命予測回路で寿命が予測できる半導体素子であるIGBT(絶縁ゲートバイポーラトランジスタ)1と、IGBT1を入力信号に基づき駆動する駆動回路16と、IGBT1の寿命を検出する寿命予測回路17とからなる寿命予測システムとを示す。なお、この図においては、IGBT1のワイヤボンディングパッドとワイヤとの接続関係が理解しやすいように描いており、通常の回路図には表されないボンディングパッドを斜線でハッチングした方形で示し、ワイヤのボンディング部を菱形の点で示している。また、図2では、IGBT1(チップ)の本発明の第1実施形態における上面図を示し、図1と合わせて各ワイヤボンディングパッドと各ワイヤとの接続関係をより明確にしている。ここで、IGBT1は、表面に、4つのエミッタワイヤボンディングパッド2と、ゲートワイヤボンディングパッド3とが設けられており、裏面にコレクタ電極4が設けられている。また、IGBT1の表面には、さらに、電流検出用のセンスワイヤボンディングパッド5と、温度検出用ダイオードのアノードワイヤボンディングパッド6およびカソードワイヤボンディングパッド7とが設けられている。
また、図3に、第1実施形態の寿命予測回路17の代案である寿命予測回路17aを示す。寿命予測回路17aは、検出抵抗27の電圧降下をコンパレータ28で検出し、コンパレータ28の検出信号でトランジスタ29をスイッチングして、警報端子30に警報信号を出力するようになっている。
2 エミッタワイヤボンディングパッド
14 寿命予測ワイヤ
15 制御エミッタワイヤ
16 駆動回路
17,17a 寿命予測回路
26 定電流回路
27 検出抵抗
29 トランジスタ
Claims (2)
- 半導体素子のワイヤボンディングパッドに接続した寿命予測ワイヤから前記ワイヤボンディングパッドを介して基準電位に電流を流して前記寿命予測ワイヤの電位を検出する半導体素子の寿命予測回路であって、
前記寿命予測ワイヤから前記ワイヤボンディングパッドを介して前記基準電位に所定の電流を流す定電流回路と、前記寿命予測ワイヤと前記基準電位との間に接続した検出抵抗とを有することを特徴とする寿命予測回路。 - 前記検出抵抗の両端に生じた電圧によってスイッチングされ、警報信号を出力可能なトランジスタを備えることを特徴とする請求項1に記載の寿命予測回路。
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US9588170B2 (en) * | 2014-07-25 | 2017-03-07 | Nxp Usa, Inc. | Systems and methods for test circuitry for insulated-gate bipolar transistors |
JP6592099B2 (ja) * | 2015-10-01 | 2019-10-16 | ローム株式会社 | 半導体装置 |
US10288696B2 (en) | 2016-11-16 | 2019-05-14 | Industrial Technology Research Institute | Intelligent diagnosis system for power module and method thereof |
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CN113239653B (zh) * | 2021-04-20 | 2022-08-12 | 武汉大学 | 基于复合失效模式耦合的igbt寿命预测方法及系统 |
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JP3245985B2 (ja) | 1992-08-20 | 2002-01-15 | 株式会社日立製作所 | 寿命診断機能を備えたインバータ装置 |
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