JP2012028443A - 半導体装置および半導体装置の製造方法 - Google Patents
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Abstract
【解決手段】回路基板11の裏面11bとヒートシンク12の接着面12aとの間には、両部材11,12を接着する接着剤20として、粘度が100Pa・s以上であるシリコーン系接着剤が塗布されており、回路基板11の裏面11bとヒートシンク12の接着面12aとの間から押し出された接着剤20の押出端部21が断面山形状に盛り上がるように形成されている。
【選択図】図2
Description
したがって、シリコーン系の接着剤にて接着された回路基板およびベース体を封止する封止部材の密着力の低下を抑制することができる。
したがって、シリコーン系の接着剤にて接着された回路基板およびベース体を封止する封止部材の密着力の低下を抑制することができる。
以下、本発明の半導体装置および半導体装置の製造方法を具現化した第1実施形態について、図面を参照して説明する。図1(A)は、第1実施形態に係る半導体装置10の構成を示す概略構成図であり、図1(B)は、図1(A)の1B−1B線相当の切断面を概略的に示す断面図である。図2は、図1の回路基板11の側面11c近傍における接着剤20の押出端部21を示す断面図である。なお、図1(A)では、便宜上、回路基板11の上部のモールド樹脂13を除いて図示している。
印刷用マスク31を使用してヒートシンク12の接着面12aに塗布された接着剤20は、印刷用マスク31を外すときに端部の厚さが厚くなるため、両面11b,12a間の接着時にこれら両面11b,12a間にて接着剤20を押し潰すと、中央部の空気が抜けきれずに当該接着剤20内にボイドが発生する場合がある。特に、接着剤20として粘度が高いものを採用する場合には、上記ボイドが発生しやすくなってしまう。そこで、回路基板11の中央部に対応する中央部23の厚さを他の部位より厚く塗布することで、両面11b,12a間の接着時に、接着剤20の中央部23が押し潰されながらボイドの元となる空気を外方へ押し出して広がるので、ボイドの発生を抑制することができる。
したがって、シリコーン系の接着剤にて接着された回路基板11およびヒートシンク12を封止するモールド樹脂13の密着力の低下を抑制することができる。
次に、本発明の第2実施形態に係る半導体装置について図15および図16を参照して説明する。図15は、第2実施形態に係る半導体装置10の要部を示す断面図である。図16(A)〜(D)は、接着時の接着剤20の流れを示す説明図である。
図15に示すように、本第2実施形態に係る半導体装置10は、回路基板11の裏面11bに表面粗さが小さい裏面樹脂40が貼り付けされている点が、上記第1実施形態および各変形例に係る半導体装置と異なる。したがって、第1実施形態の半導体装置と実質的に同一の構成部分には、同一符号を付し、その説明を省略する。
次に、本発明の第3実施形態に係る半導体装置について図17を参照して説明する。図17は、第3実施形態に係る半導体装置10の要部を示す断面図である。
図17に示すように、本第3実施形態に係る半導体装置10は、回路基板11の裏面11bに外縁部11eが中央部11fよりも厚みが薄くなるように段部11dが形成されている点が、上記第1実施形態および各変形例に係る半導体装置と異なる。したがって、第1実施形態の半導体装置と実質的に同一の構成部分には、同一符号を付し、その説明を省略する。
(1)回路基板11は、ヒートシンク12に代えて、リードフレームなどベース体となり得るものの接着面に対して接着剤20にて接着されて封止部材であるモールド樹脂13にて封止されてもよい。
11…回路基板
11a…表面
11b…裏面
11c…側面
11d…段部
12…ヒートシンク(ベース体)
12a…接着面
13…モールド樹脂(封止部材)
20…接着剤
21…押出端部
22…フィレット
23…中央部
24…四隅部
31…印刷用マスク
32…溝付スキージ
40…裏面樹脂
Claims (11)
- 回路基板とこの回路基板が接着剤により接着されるベース体との少なくとも一部が封止部材により封止される半導体装置において、
前記回路基板の裏面と前記ベース体の接着面との間には、前記接着剤として粘度が100Pa・s以上であるシリコーン系接着剤が塗布され、
前記回路基板の裏面と前記ベース体の接着面との間から押し出された前記接着剤が断面山形状に盛り上がるように形成されることを特徴とする半導体装置。 - 前記ベース体の接着面の表面粗さは、前記回路基板の裏面の表面粗さよりも大きいことを特徴とする請求項1に記載の半導体装置。
- 前記回路基板の裏面には、外縁部が中央部よりも厚みが薄くなるように段部が形成されることを特徴とする請求項1または2に記載の半導体装置。
- 前記シリコーン系接着剤に含まれるフィラーの割合が70wt%以上であることを特徴とする請求項1〜3のいずれか一項に記載の半導体装置。
- 回路基板とこの回路基板が接着剤により接着されるベース体との少なくとも一部が封止部材により封止される半導体装置の製造方法において、
前記接着剤として粘度が100Pa・s以上であるシリコーン系接着剤を、前記ベース体の接着面および前記回路基板の裏面のいずれか一方に塗布する第1工程と、
前記回路基板の裏面と前記ベース体の接着面とを前記接着剤を介して接着するとともにこれら両面間から押し出された接着剤を断面山形状に盛り上げる第2工程と、
接着された前記回路基板および前記ベース体の少なくとも一部を前記封止部材により封止する第3工程と、
を備えることを特徴とする半導体装置の製造方法。 - 前記ベース体の接着面の表面粗さは、前記回路基板の裏面の表面粗さよりも大きいことを特徴とする請求項5に記載の半導体装置の製造方法。
- 前記回路基板の裏面には、外縁部が中央部よりも厚みが薄くなるように段部が形成されることを特徴とする請求項5または6に記載の半導体装置の製造方法。
- 前記シリコーン系接着剤に含まれるフィラーの割合が70wt%以上であることを特徴とする請求項5〜7のいずれか一項に記載の半導体装置の製造方法。
- 前記第1工程では、前記接着剤は、前記回路基板の中央部および四隅に対応する部位の厚さが他の部位より厚く塗布されることを特徴とする請求項5〜8のいずれか一項に記載の半導体装置の製造方法。
- 前記第1工程では、前記回路基板の中央部および四隅に対応する前記接着剤の部位の少なくともいずれかは、要求される厚みに応じた形状の溝付スキージを用いて、他の部位より厚く塗布されることを特徴とする請求項9に記載の半導体装置の製造方法。
- 前記第1工程では、前記回路基板の中央部および四隅に対応する前記接着剤の部位の少なくともいずれかは、ディスペンス法により、他の部位より厚く塗布されることを特徴とする請求項9に記載の半導体装置の製造方法。
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2015198911A1 (ja) * | 2014-06-26 | 2015-12-30 | ソニー株式会社 | 半導体装置および半導体装置の製造方法 |
CN108695273A (zh) * | 2017-07-17 | 2018-10-23 | 睿力集成电路有限公司 | 窗口型球栅阵列封装组件 |
JP7549214B2 (ja) | 2020-10-30 | 2024-09-11 | 日亜化学工業株式会社 | 発光装置及びその製造方法 |
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WO2015198911A1 (ja) * | 2014-06-26 | 2015-12-30 | ソニー株式会社 | 半導体装置および半導体装置の製造方法 |
CN106415826A (zh) * | 2014-06-26 | 2017-02-15 | 索尼公司 | 半导体器件和制造半导体器件的方法 |
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CN108695273A (zh) * | 2017-07-17 | 2018-10-23 | 睿力集成电路有限公司 | 窗口型球栅阵列封装组件 |
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JP7549214B2 (ja) | 2020-10-30 | 2024-09-11 | 日亜化学工業株式会社 | 発光装置及びその製造方法 |
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