JP2016111028A - 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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Abstract
Description
図1〜図6は、この発明に係る第1の実施の形態の半導体装置100の製造方法を示すものであり、工程順に示した製造工程図である。ここではインサート端子ケース7の形成方法を説明する。( )内の番号は工程順番を示す。
(1)図1に示すリードフレーム20を準備する。図1はリードフレーム20の構成図である。図1(a)は平面図である。図1(b)は図1(a)のX−X線で切断した断面図である。リードフレーム20は外部端子12と、前記内部端子11と、前記内部端子11同士を接続する端子連結部21を備える。前記外部端子12と前記内部端子11は接続部40で繋がる。内部端子11から端子連結部21に向かってタイバーカットによる切断個所Vを挟んで凹部22が形成されている。図12(b)に示すように、この凹部22がL状段差部17になり、切断個所Vが内部端子11の先端11aとなる。また、凹部22はプレス加工などで形成される。勿論、ローラーに凸部を設け、このローラーを用いて圧延して凹部を形成した板材(通常、異形条材と言われる板材)を用いても構わない。リードフレーム20の材質は例えば銅であり、表面は例えばニッケルメッキが施されている。しかし、一般的に用いられる材料であれば、これに限定されるものではない。また、内部端子11の幅Z1は3mm程度であり、厚さR1は1mm程度であり、凹部22の厚さR2は0.1から0.7mmであり、好ましくは0.4から0.6mmである。また、R1に対するR2の比(R2/R1)は0.1から0.7であり、好ましくは0.4から0.6である。この範囲において、タイバーカット時の内部端子の変形をより効果的に抑えることができる。また、リードフレーム20を構成する端子連結部21はタイバーカットで切り落とされる不要部分である。この端子連結部21には多数の貫通孔21aが形成されていてもよい。この貫通孔21aは平板からリードフレーム20を形成するときに形成される。前記貫通孔21aは、リードフレームの搬送や位置決めに用いられる。
(2)図3において、下部金型25にリードフレーム20を載置し、その後、上部金型24を下部金型25の上に載置する。リードフレーム20の下部金型25に対する位置決めは下部金型25に形成された凹部27にリードフレーム20の端子連結部21を勘合して行う。また、外部端子12の先端12aは下部金型25の凹部26の先端26aに勘合され、位置決めとして利用される。図3はリードフレーム20を金型23に配設したときの構成図である。
(3)図4において、注入口29から樹脂液30を金型に注入し、温度200℃程度で樹脂液30を硬化させて、樹脂ケース9を形成する。図4は樹脂液30を硬化させるときの説明図である。樹脂液30としては例えば、PPS(ポリフェニレンサルファド)樹脂などを用いる。
(4)図5において、樹脂ケース9が形成されたリードフレーム20(以下、リードフレーム構造体31と称す)を前記金型23から取り出す。図5は金型23からリードフレーム構造体31を取り出した図である。図5(a)は平面図である。図5(b)は図5(a)のX−X線で切断した断面図である。点線で示す切断個所Vは内部端子11と端子連結部21はリードフレーム20の凹部22に設けられる。この凹部22に樹脂固定部18となる樹脂39が埋設される。なお、図12等に示すように、内部端子11の表面11bと水平樹脂部14の表面14bは同一高さであることが好ましい。しかしながら、前記内部端子11の表面11bが水平樹脂部14の表面14bより高くても低くてもかまわない。
(5)図6において、樹脂ケース9から露出した前記端子連結部21と接続する内部端子11の先端11aとなる点線Vの位置で切断し、リードフレーム構造体31からインサート端子ケース7を形成する。切断はタイバーカットで行う。タイバーカットとは、内部端子11と端子連結部21(図5参照)が複数個所で繋がれ、その複数の繋がれた個所(タイバー)を同時に切断する場合をいう。
前記の実施の形態で説明した製造方法を用いて製造した半導体装置について説明する。
2 はんだ
3 絶縁基板
4 はんだ
5 半導体素子
6 接着剤
7 インサート端子ケース
8 ボンディングワイヤ
9 樹脂ケース
9a 樹脂ケースの内壁
10 外部導出端子
11 内部端子
11a 内部端子の先端
11b 内部端子の表面
12 外部端子
12a 外部端子の先端
13 上側の垂直樹脂部
14 水平樹脂部
14a 水平樹脂部の先端
14b 水平樹脂部の表面
15 下側の垂直樹脂部
16 溝
17 L状段差部
18 樹脂固定部
18a 樹脂固定部の側壁
18b 樹脂固定部の上面
20 リードフレーム
21 端子連結部
21a 貫通孔
22,26,27,28 凹部
22a 端部
23 金型
24 上部金型
25 下部金型
26a 凹部26の先端
29 注入口
30 樹脂液
31 リードフレーム構造体
33 凹部
35 上部支持体
35a 上部支持体の側壁
36 切断刃
37 下部支持体
37a 下部支持体の側壁
40 接続部
100〜700 本発明の半導体装置
800 タイバーカット装置
V 切断個所
FP 加圧力
Claims (11)
- 端子ケースを有する半導体装置において、
外部端子と、該外部端子の接続部に接続する内部端子で構成される外部導出端子と、前記外部端子が固定される上側の垂直樹脂部と該上側の垂直樹脂部に接続し前記内部端子を溝に埋設する水平樹脂部と、該水平樹脂部に接続する下側の垂直樹脂部とを備える半導体装置であって、
前記内部端子の上面の一部が前記水平樹脂部に接続する樹脂固定部で被覆され、前記接続部側とは反対の内部端子の長手方向の先端面が、露出した切断面であることを特徴とする半導体装置。 - 前記内部端子の前記先端面から前記接続部に向かってL状段差部がされ、前記L状段差部に前記樹脂固定部が配置され、前記内部端子の露出した上面と前記樹脂固定部の上面が平坦に接続することを特徴とする請求項1に記載の半導体装置。
- 前記内部端子の前記先端面から接続部に向かってL状段差部が配置され、前記L状段差部に前記樹脂固定部が配置され、前記内部端子の露出した上面より前記樹脂固定部の上面が突出していることを特徴とする請求項1に記載の半導体装置。
- 前記内部端子の短手方向に凹部が配置され、前記凹部に前記樹脂固定部が配置され、前記内部端子の露出した上面と前記樹脂固定部の上面が平坦に接続することを特徴とする請求項1に記載の半導体装置。
- 前記内部端子の短手方向に凹部が配置され、前記凹部に前記樹脂固定部が配置され、前記内部端子の露出した上面より前記樹脂固定部の上面が突出していることを特徴とする請求項1に記載の半導体装置。
- 前記内部端子の露出した上面が平坦であり、前記内部端子上面に前記樹脂固定部が配置されることを特徴とする請求項1に記載の半導体装置。
- 前記請求項1乃至6のいずれか一項に記載の半導体装置の製造方法において、
前記外部導出端子の内部端子に接続する端子連結部を有するリードフレームを金型に配置する工程と、
前記金型に液状の樹脂を注入し、該液状の樹脂を硬化させ、樹脂固定部を有するリードフレーム構造体を形成する工程と、
前記リードフレーム構造体を前記金型から取り出す工程と、
前記端子連結部を切断し、端子ケースを形成する工程と、
を含むことを特徴とする半導体装置の製造方法。 - 前記内部端子と前記端子連結部に連続する一つの凹部を形成し、前記凹部を前記樹脂固定部となる樹脂で充填し、前記凹部に充填された前記樹脂と前記凹部下の前記リードフレームを同時に切断することを特徴とする請求項7に記載の半導体装置の製造方法。
- 前記内部端子の短手方向に凹部を形成し、前記凹部を前記樹脂固定部となる樹脂で充填し、前記凹部が形成されていない前記端子連結部側のリードフレームを切断することを特徴とする請求項7に記載の半導体装置の製造方法。
- 前記内部端子と前記端子連結部に連続する平坦な個所の上面に前記樹脂固定部なる樹脂を形成し、前記樹脂と前記樹脂下の前記リードフレームを同時に切断することを特徴とする請求項7に記載の半導体装置の製造方法。
- 前記内部端子の平坦な上面に、短手方向に前記樹脂固定部となる樹脂を形成し、前記樹脂が形成されていない前記端子連結部側のリードフレームを切断することを特徴とする請求項7に記載の半導体装置の製造方法。
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