JP2019212704A - 半導体装置およびその製造方法 - Google Patents
半導体装置およびその製造方法 Download PDFInfo
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- JP2019212704A JP2019212704A JP2018106049A JP2018106049A JP2019212704A JP 2019212704 A JP2019212704 A JP 2019212704A JP 2018106049 A JP2018106049 A JP 2018106049A JP 2018106049 A JP2018106049 A JP 2018106049A JP 2019212704 A JP2019212704 A JP 2019212704A
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- 238000004519 manufacturing process Methods 0.000 title claims description 25
- 239000011347 resin Substances 0.000 claims abstract description 234
- 229920005989 resin Polymers 0.000 claims abstract description 234
- 238000007789 sealing Methods 0.000 claims description 152
- 239000008393 encapsulating agent Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 9
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- 238000004080 punching Methods 0.000 description 4
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- 239000004332 silver Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
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Abstract
Description
本発明は上記課題に鑑みなされたもので、特性変動の少ない小型の半導体装置の提供を目的とする。
第1の樹脂封止体と、
前記第1の樹脂封止体の表面に設けられた素子搭載部と、
前記素子搭載部に載置された半導体素子と、
前記素子搭載部の周囲に設けられ、前記半導体素子と電気的に接続されたインナーリードと、
前記インナーリードから延伸するアウターリードと、
前記インナーリードを被覆する第1の樹脂封止体と、
前記第1の樹脂封止体の上面および前記半導体素子を被覆する第2の樹脂封止体と、
を備え、
前記インナーリードは前記第1の樹脂封止体に被覆され、
前記インナーリードの先端部の上面は前記素子搭載部の底面の下方に位置することを特徴とする半導体装置とした。
前記リードの先端部を下方に折り曲げる工程と、
前記リードフレームの前記フレーム枠内に第1の樹脂封止体を形成し、前記先端部を前記第1の樹脂封止体で覆い、前記先端部を除く前記リードの他部を前記第1の樹脂封止体から露出する工程と、
前記先端部の上方に設けられた素子搭載部上に半導体素子を固着する工程と、
前記半導体素子の電極部と前記他部を電気的に接続する工程と、
前記半導体素子を第2の樹脂封止体で被覆する工程と、
前記前記第1の樹脂封止体の薄肉領域を除去する工程と、
前記他部を前記フレーム枠から切り離し、アウターリードを形成する工程と、
を備えることを特徴とする半導体装置の製造方法を用いた。
前記リードおよび前記樹脂保持リードの先端部を下方に折り曲げる工程と、
前記リードフレームの前記フレーム枠内に第1の樹脂封止体を形成し、前記先端部を前記第1の樹脂封止体で覆い、前記先端部を除く前記リードの他部を前記第1の樹脂封止体から露出する工程と、
前記先端部の上方に設けられた素子搭載部上に半導体素子を固着する工程と、
前記半導体素子の電極部と前記他部を電気的に接続する工程と、
前記半導体素子を第2の樹脂封止体で被覆する工程と、
前記前記第1の樹脂封止体の薄肉領域を除去する工程と、
前記他部を前記フレーム枠から切り離し、アウターリードを形成する工程と、
前記樹脂保持リードを前記フレーム枠から切り離す工程と、
を備えることを特徴とする半導体装置の製造方法を用いた。
図1は本発明の第1の実施形態に係る半導体装置の鳥瞰図である。
図1に示すように、半導体装置は第1の樹脂封止体4と第2の樹脂封止体8によって被覆された半導体素子とリード2から延伸して設けられたアウターリード2bが第1の樹脂封止体4から露出させた構成である。リード2の上面は第1の樹脂封止体4の上面と同一面を成し、第2の樹脂封止体8の下面と接している。
図3は本発明の第1の実施形態に係る半導体装置に用いるリードフレームを示す図である。図3(a)は鳥瞰図であり、図3(b)は図3(a)のC−C線における断面図である。リードフレーム1はその外周に位置し、4本の枠からなる矩形のフレーム枠1aの2本の枠の内側に形成された複数のリード2とからなる。リード2はフレーム枠1aの対向する2本の枠のそれぞれに接続され、互いに内側に向かって延伸している。リード2のフレーム枠1aに近い領域が後にアウターリード2bとなり、フレーム枠1aから離れた領域が後にインナーリード2aとなる。まずは、平板からフレーム枠1aとリード2を成形したリードフレーム1を準備し、次に、インナーリード2aの先端領域に下方向に向う曲げ形状の先端部3を形成する。このとき、曲げ形状の先端部3がリード2の厚みよりも深くなるように曲げ加工が施される。次いで、インナーリード2aの表面に銀メッキ膜(図示せず)を形成する。この銀メッキ膜は後のワイヤー接合を容易とするものである。一般的にリードフレームはスタンピングプレス金型を用いて製造されるが、上記リードフレームのような簡単な形状であれば、加工に用いられるスタンピングプレス金型の形状抜き加工用パンチおよびダイが少なく、製作する部品の少ない安価な金型となる。また、パンチを保持するストリッパープレートの形状加工も減るためさらに安価な金型となる。このように、本発明の半導体装置に用いられるリードフレームは安価な金型でのスタンピングプレス加工により安価なリードフレームを製作することが可能となり、結果として本発明の半導体装置の製造コストを低減することが可能となり、従来の半導体装置に比べ安価な半導体装置の提供ができる。
離間して対向するインナーリード2aの曲げ形状の先端部3および樹脂保持リード9の曲げ形状の先端部9aの上方である第1の樹脂封止体4の表面領域が素子搭載部11となっており、ここにダイアタッチ剤5を介して半導体素子6が固着している。第1の樹脂封止体4と第2の樹脂封止体8の側面はほぼ同一面を成し、ほぼ直方体形状の樹脂封止体となっている。
図10は本発明の第2の実施形態に係る半導体装置に用いるリードフレームを示す図である。図10(a)は鳥瞰図であり、図10(b)は図10(a)のG−G線における断面図である。リードフレーム1はその外周に位置するフレーム枠1aの2本の枠の内側に形成された複数のリード2と上記2本の枠に隣接する他の2本の枠の内側に形成された樹脂保持リード9からなる。リード2はフレーム枠1aの対向する2本の枠のそれぞれに接続され、樹脂保持リード9は該2本の枠と隣り合う他の2本の枠のそれぞれに接続され、互いに内側に向かって延伸している。リード2のフレーム枠1aに近い領域が後にアウターリード2bとなり、フレーム枠1aから離れた領域が後にインナーリード2aとなる。まずは、平板からフレーム枠1aとリード2と樹脂保持リード9を成形したリードフレーム1を準備し、次に、インナーリード2aの先端領域に下方向に向う曲げ形状の先端部3を形成し、樹脂保持リード9の先端領域に下方向に向う曲げ形状の先端部9aを形成する。このとき、インナーリード2aの曲げ形状の先端部3や樹脂保持リードの曲げ形状の先端部9aがリード2の厚みよりも深くなるように曲げ加工が施される。次いで、インナーリード2aの表面に銀メッキ膜(図示せず)を形成する。この銀メッキ膜は後のワイヤー接合を容易とするものである。
1a フレーム枠
1b フレーム枠
2 リード
2a インナーリード
2b アウターリード
3 曲げ形状の先端部
4 第1の樹脂封止体
4a 凸部領域
4b 薄肉領域
5 ダイアタッチ剤
6 半導体素子
7 ワイヤー
8 第2の樹脂封止体脂
9 樹脂保持リード
9a 樹脂保持リードの曲げ形状の先端部
10 一体化した樹脂封止体
11 素子搭載部
12 メッキ膜
Claims (9)
- 第1の樹脂封止体と、
前記第1の樹脂封止体の表面に設けられた素子搭載部と、
前記素子搭載部に載置された半導体素子と、
前記素子搭載部の周囲に設けられ、前記半導体素子と電気的に接続されたインナーリードと、
前記インナーリードから延伸するアウターリードと、
前記第1の樹脂封止体の上面および前記半導体素子を被覆する第2の樹脂封止体と、
を備え、
前記インナーリードは前記第1の樹脂封止体に被覆され、
前記インナーリードの先端部の上面は前記素子搭載部の底面の下方に位置することを特徴とする半導体装置。 - 前記インナーリードの先端部には曲げ形状が施されていることを特徴とする請求項1に記載の半導体装置。
- 前記インナーリードの一部は前記第1の樹脂封止体から露出し、前記第2の樹脂封止体と接することを特徴とする請求項1または請求項2に記載の半導体装置。
- 前記インナーリードは対向する2つの側面に設けられ、前記2つの側面に隣り合う側面に樹脂保持リードが設けられていることを特徴とする請求項1乃至3のいずれか1項に記載の半導体装置。
- 前記樹脂保持リードの先端部には曲げ形状が施されていることを特徴とする請求項4に記載の半導体装置。
- 前記半導体チップ上の前記第2の樹脂封止体の厚さが前記第1の樹脂封止体の厚さよりも薄いことを特徴とする請求項1乃至請求項5のいずれか1項に記載の半導体装置。
- フレーム枠の対向する2本の枠に接続されたリードを有するリードフレームを準備する工程と、
前記リードの先端部を下方に折り曲げる工程と、
前記リードフレームの前記フレーム枠内に第1の樹脂封止体を形成し、前記先端部を前記第1の樹脂封止体で覆い、前記先端部を除く前記リードの他部を前記第1の樹脂封止体から露出する工程と、
前記先端部の上方に設けられた素子搭載部上に半導体素子を固着する工程と、
前記半導体素子の電極部と前記他部を電気的に接続する工程と、
前記半導体素子を第2の樹脂封止体で被覆する工程と、
前記前記第1の樹脂封止体の薄肉領域を除去する工程と、
前記他部を前記フレーム枠から切り離し、アウターリードを形成する工程と、
を備えることを特徴とする半導体装置の製造方法。 - フレーム枠の対向する2本の枠に接続されたリードと前記対向する2本の枠と隣り合う他の2本の枠に接続された樹脂保持リードとを有するリードフレームを準備する工程と、
前記リードおよび前記樹脂保持リードの先端部を下方に折り曲げる工程と、
前記リードフレームの前記フレーム枠内に第1の樹脂封止体を形成し、前記先端部を前記第1の樹脂封止体で覆い、前記先端部を除く前記リードの他部を前記第1の樹脂封止体から露出する工程と、
前記先端部の上方に設けられた素子搭載部上に半導体素子を固着する工程と、
前記半導体素子の電極部と前記他部を電気的に接続する工程と、
前記半導体素子を第2の樹脂封止体で被覆する工程と、
前記前記第1の樹脂封止体の薄肉領域を除去する工程と、
前記他部を前記フレーム枠から切り離し、アウターリードを形成する工程と、
前記樹脂保持リードを前記フレーム枠から切り離す工程と、
を備えることを特徴とする半導体装置の製造方法。 - 前記アウターリードを形成する工程の後に、前記半導体素子の電気特性試験を行う工程を備えることを特徴とする請求項8に記載の半導体装置の製造方法。
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