JP3913228B2 - 樹脂封止型半導体装置及びその製造方法 - Google Patents
樹脂封止型半導体装置及びその製造方法 Download PDFInfo
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- JP3913228B2 JP3913228B2 JP2004117283A JP2004117283A JP3913228B2 JP 3913228 B2 JP3913228 B2 JP 3913228B2 JP 2004117283 A JP2004117283 A JP 2004117283A JP 2004117283 A JP2004117283 A JP 2004117283A JP 3913228 B2 JP3913228 B2 JP 3913228B2
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Description
上記ダイパッドの上面に半導体チップを搭載する工程と、上記半導体チップと上記第1のリードとを電気的に接続する工程と、上記半導体チップと上記第2のリードとを電気的に接続する工程と、上記第1のリードおよび上記第2のリードの上記外部端子の上記ダイパッド側の先端位置が一致するように上記第2のリードを上方へ折り曲げ、上記ダイパッドを上記第1のリードより上方に形成する工程と、上記第1のリードおよび上記第2のリードの下部の少なくとも一部を上記外部端子として露出させるように、上記第1のリードと上記第2のリードと上記ダイパッドと上記半導体チップとを封止する工程とからなることを特徴とする。
本発明の第1の実施形態として、リードフレームと、該リードフレームを用いて製造されるQFNである樹脂封止型半導体装置を説明する。
はじめに、本発明の第1の実施形態に係るQFN型の樹脂封止型半導体装置に用いられるリードフレーム(以下、「本実施形態のリードフレーム」と称する)について説明する。
図10(a)〜(c)は、それぞれ上述のリードフレームを用いて製造された本実施形態の樹脂封止型半導体装置の、底面から見たときの平面図,Xb−Xb線における断面図及び外観を示す斜視図である。なお、本明細書中では、外部端子104が露出した面を樹脂封止型半導体装置の底面あるいは下面とし、それに対向する面を上面と称する。
次に、本実施形態の樹脂封止型半導体装置の高周波特性について調べた結果について説明する。
このとき、導通道程1mm当たりのインダクタンスが1nHとすると、上記信号の導通道程におけるインダクタンスは、本実施形態の樹脂封止型半導体装置で0.80nHであるのに対し、QFPでは2.40nHとなる。このインダクタンスの差は、図21で検討された範囲を遙かに越える差である。
次に、本実施形態の樹脂封止型半導体装置の製造方法の一例について説明する。
本発明の第1の参考例として、QFNの一変形例であるHQFN(ヒートシンク付きQuad Flat Non-leaded Package)を説明する。
また、図27(c)に示すように、樹脂封止型半導体装置の底面の四隅に露出する吊りリード125は、ダイパッド126に接続されると共に半導体チップ221の接地用電極パッドに電気的に接続されており、接地用接続リード123を兼ねている。
本発明の第2の実施形態として、SONである樹脂封止型半導体装置の説明を図を用いて行なう。
図37(a)は、本実施形態に係る樹脂封止型半導体装置の第1の変形例を底面から見たときの平面図であり、図37(b)は、段差加工を施したリードフレームを用いた場合の第1の変形例の断面図であり、図37(c)は、段差加工とテーパー段差加工とを施した場合の第1の変形例の断面図である。なお、図37(b),(c)は、ダイパッド136を通り、長手方向に切った断面を示している。
本発明の第2の参考例として、LGAである樹脂封止型半導体装置の説明を以下に行なう。
次に、外部端子が3列になっている本参考例の樹脂封止型半導体装置の変形例について説明する。
101b,101c 位置決め穴
102,122,132,142 信号用リード
103,123,133,143 接地用接続リード
104,124,134,144 外部端子
105,125,135,145 吊りリード
106,126,136,146 ダイパッド
107 外形ライン
108 モールドライン
111 封止テープ
112 回路
116 基板配線
117 溝
151 装置分離用ブレード
151a 装置分離ライン
152 装置貼付用テープ
201,231,221,241 半導体チップ
202,222,232,242 金属細線
203,223,233,243 封止樹脂
204 ゲート
205 ランナー
206a,206b 樹脂封止金型
207 プランジャー
208 ポッド
209 エアベント
210 空気逃げ溝
Claims (10)
- ダイパッドと、
上記ダイパッドの上面に搭載された半導体チップと、
上記半導体チップの周囲に配置され、上記半導体チップと電気的に接続された第1のリードと、
上記ダイパッドを支持し、上記半導体チップと電気的に接続された第2のリードと、
上記第1のリードおよび上記第2のリードの下部の少なくとも一部を外部端子として露出させるように、上記第1のリードと上記第2のリードと上記ダイパッドと上記半導体チップとを封止する封止樹脂とを備え、
上記第1のリードの上記外部端子と上記第2のリードの上記外部端子は平行に形成され、
上記第1のリードおよび上記第2のリードの上記外部端子の上記ダイパッド側の先端位置が一致し、
上記ダイパッドは上記第1のリードより上方に形成されていることを特徴とする樹脂封止型半導体装置。 - 上記第2のリードは、上記外部端子となる部分と上記ダイパッドとの間に存在する折れ曲がり部分の厚みが、上記第2のリードの上記外部端子となる部分の厚みより薄くなっていることを特徴とする請求項1に記載の樹脂封止型半導体装置。
- 上記第2のリードが、少なくとも一つの上記第1のリードを挟むように形成されていることを特徴とする請求項1に記載の樹脂封止型半導体装置。
- 上記第2のリードを上方へ折り曲げるための立ち上がり部の裏面に溝を設けたことを特徴とする請求項1に記載の樹脂封止型半導体装置。
- 上記第2のリードの短手方向の幅は、2つの上記第1のリードとその間の幅を合わせた幅に等しいことを特徴とする請求項1に記載の樹脂封止型半導体装置。
- 高周波用半導体装置であることを特徴とする請求項1に記載の樹脂封止型半導体装置。
- ダイパッドと、上記ダイパッド側の周囲に配置された第1のリードと、上記ダイパッドを支持する第2のリードとを備え、上記第1のリードの外部端子なる部分と上記第2のリードの上記外部端子となる部分は平行に形成されたリードフレームを用意する工程と、
上記ダイパッドの上面に半導体チップを搭載する工程と、
上記半導体チップと上記第1のリードとを電気的に接続する工程と、
上記半導体チップと上記第2のリードとを電気的に接続する工程と、
上記第1のリードおよび上記第2のリードの上記外部端子の上記ダイパッド側の先端位置が一致するように上記第2のリードを上方へ折り曲げ、上記ダイパッドを上記第1のリードより上方に形成する工程と、
上記第1のリードおよび上記第2のリードの下部の少なくとも一部を上記外部端子として露出させるように、上記第1のリードと上記第2のリードと上記ダイパッドと上記半導体チップとを封止する工程とからなることを特徴とする樹脂封止型半導体装置の製造方法。 - 上記第2のリードを上方へ折り曲げるための立ち上がり部の裏面に溝を形成する工程を有することを特徴とする請求項7に記載の樹脂封止型半導体装置の製造方法。
- 上記第2のリードが、少なくとも一つの上記第1のリードを挟むように形成されているリードフレームであることを特徴とする請求項7に記載の樹脂封止型半導体装置の製造方法。
- 上記第2のリードの短手方向の幅は、2つの上記第1のリードとその間の幅を合わせた幅に等しいリードフレームであることを特徴とする請求項7に記載の樹脂封止型半導体装置の製造方法。
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