JP2016082024A - 半導体装置の製造方法 - Google Patents
半導体装置の製造方法 Download PDFInfo
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Abstract
Description
図1は、本発明の実施の形態1に係る半導体装置の製造方法で製造された半導体装置10の断面図である。半導体装置10は金属で形成されたヒートシンク12を備えている。ヒートシンク12の上には、フィードスルー14とフレーム16が設けられている。ヒートシンク12、フレーム16及びフィードスルー14の表面には例えば金めっきが形成されている。フレーム16は平面視で環状の金属であり、その大部分でヒートシンク12に接する。フレーム16の上面は、内縁側の第1上面16aと、外縁側の第2上面16bを有している。第1上面16aは第2上面16bより高い位置にある。第2上面16bにはんだ18がある。はんだ18は平面視でリング状の形状を有している。はんだ18によって、フレーム16とキャップ20とが接合されている。キャップ20は下に凸となる凸部を有する金属である。この凸部がはんだ18に接している。キャップ20とフレーム16の表面には例えば金でめっきが形成されている。
図8は、実施の形態2に係る半導体装置の断面図である。キャップ100は凹凸のない平坦な形状を有している。第1上面16aと第2上面16bの高さの差をはんだ18の厚さと一致させることで、キャップ100に凸部などを設ける必要が無くなる。キャップ100を凹凸のない平坦な形状とすることで、キャップ100の加工費を抑制できる。
図9は、実施の形態3に係る半導体装置の断面図である。フレーム200の上面には凹部200aが形成されている。凹部200aの形状は特に限定されないが、例えばV字型の溝である。加熱工程では溶融したはんだ18がこの凹部200aを満たす。よって、はんだ18がフレーム200の上面を広範囲に渡ってぬれ広がり、はんだ18がパッケージ内部に侵入することを防止できる。
図10は、実施の形態4に係る半導体装置の断面図である。フレーム102の上面102aは平坦な形状を有している。キャップ250は第1下面250aと、第1下面250aより高い位置にある第2下面250bを備えている。第1下面250aと第2下面250bの高さの差ははんだ18の厚さと一致させることが好ましい。第2下面250bは平面視で第1下面250aを囲む。フレーム102の上面102aのうち内縁を含む部分はキャップ250の第1下面250aと直接接する。
図13は、実施の形態5に係る半導体装置の断面図である。フレーム400の上面に第1凹部400aが形成されている。キャップ402の下面に第2凹部402aが形成されている。第1凹部400aと第2凹部402aは平面視で重なる。第1凹部400aの深さと第2凹部402aの深さの和ははんだ18の厚さ以下とすることが好ましい。このように、第1凹部400aと第2凹部402aの両方にはんだ18があることで、フレーム400とキャップ402の接合強度を増加させることができる。
図16は、実施の形態6に係る半導体装置の断面図である。フレーム550は第1上面550aと、第1上面550aよりも高さの高い第2上面550bを有している。第2上面550bは第1上面550aよりもフレーム550の外縁側にある。
Claims (11)
- 金属で形成されたヒートシンクの上に、半導体素子と、前記半導体素子を囲むフレームとをのせる工程と、
前記フレームの上面にはんだをのせる工程と、
前記はんだの上にキャップをのせる工程と、
前記キャップを前記フレームに対してスクラブせずに、前記フレームに向かう力を前記キャップに及ぼしながら、前記はんだを加熱する加熱工程と、を備え、
前記加熱工程では、前記ヒートシンクに熱源を接触させて前記熱源により前記はんだを加熱することを特徴とする半導体装置の製造方法。 - 前記フレームの上面は、内縁側の第1上面と、外縁側の第2上面を有し、
前記第1上面は前記第2上面より高い位置にあり、
前記はんだは前記第2上面にのせられることを特徴とする請求項1に記載の半導体装置の製造方法。 - 前記キャップは凹凸のない平坦な形状を有することを特徴とする請求項1又は2に記載の半導体装置の製造方法。
- 前記フレームの上面は平坦な形状を有することを特徴とする請求項1又は3に記載の半導体装置の製造方法。
- 前記フレームの上面には凹部が形成され、
前記加熱工程では溶融した前記はんだが前記凹部を満たすことを特徴とする請求項1に記載の半導体装置の製造方法。 - 前記加熱工程では、前記フレームの上面のうち内縁を含む部分は前記キャップと直接接することを特徴とする請求項1に記載の半導体装置の製造方法。
- 前記加熱工程では、前記フレームの上面のうち外縁を含む部分は前記キャップと直接接することを特徴とする請求項6に記載の半導体装置の製造方法。
- 前記フレームの上面には第1凹部が形成され、
前記キャップの下面には平面視で前記第1凹部に重なる第2凹部が形成され、
前記はんだは前記第1凹部と前記第2凹部に設けられたことを特徴とする請求項1に記載の半導体装置の製造方法。 - 前記フレームの側面と前記キャップの側面が接することを特徴とする請求項1に記載の半導体装置の製造方法。
- 前記フレームと前記キャップの表面にはめっきが形成されたことを特徴とする請求項1〜9のいずれか1項に記載の半導体装置の製造方法。
- 前記半導体素子と外部を電気的に接続するフィードスルーを備えたことを特徴とする請求項1〜10のいずれか1項に記載の半導体装置の製造方法。
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