JP2014154848A - 樹脂封止型半導体装置の製造方法およびリードフレーム - Google Patents
樹脂封止型半導体装置の製造方法およびリードフレーム Download PDFInfo
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- JP2014154848A JP2014154848A JP2013025966A JP2013025966A JP2014154848A JP 2014154848 A JP2014154848 A JP 2014154848A JP 2013025966 A JP2013025966 A JP 2013025966A JP 2013025966 A JP2013025966 A JP 2013025966A JP 2014154848 A JP2014154848 A JP 2014154848A
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 72
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 claims abstract description 94
- 239000002184 metal Substances 0.000 claims abstract description 94
- 238000007747 plating Methods 0.000 claims abstract description 80
- 239000011347 resin Substances 0.000 claims abstract description 44
- 229920005989 resin Polymers 0.000 claims abstract description 44
- 238000007789 sealing Methods 0.000 claims description 29
- 229910000679 solder Inorganic materials 0.000 claims description 9
- 229910001111 Fine metal Inorganic materials 0.000 claims description 7
- 238000005530 etching Methods 0.000 claims description 6
- 230000010485 coping Effects 0.000 abstract 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
【解決手段】リード2のインナーリード3とアウターリード4のそれぞれに金属メッキ層8,9を設け、ダイパッド1上に半導体チップを搭載し、半導体チップ表面の電極とインナーリード3とを金属細線で接続し、アウターリード4が露出するように半導体チップ6や金属細線7などを封止樹脂11で封止した後、デフォーカスしたレーザーにて樹脂バリを除去し、リードに付着した金属をリフトオフする。
【選択図】図3
Description
図7は、従来の樹脂封止型半導体装置を製造するために用いられるリードフレームの平面図である。従来のリードフレーム40は、四角形の外枠と、外枠で囲まれる領域のほぼ中央部に設けられ半導体チップが載置される四角形のダイパッド21と、外枠とダイパッド1とを接続する吊りリード25と、半導体チップが載置された状態で金属細線等の接続手段により半導体チップと電気的に接続されるインナーリード23と、インナーリード23に連続して設けられ、外部端子との接続のためのアウターリード24とにより構成されている。複数のリード22は、タイバー32によって互いに連結されている。銀などからなる金属メッキ層28はダイパッド21およびリード22のインナーリード23に選択的に被覆されている。また、点線で囲った部分は封止樹脂31によって封止される領域となる。なお、リードフレーム40は、図6に示した構成よりなるパターンが1つだけ独立してあるわけではなく、大量生産のため複数個が図で左右、上下に連続して配列されたものである。
まず、ダイパッドと複数のリードからなるリードフレームと、半導体チップと、封止樹脂とからなる樹脂封止型半導体装置の製造方法であって、前記リードフレームおよび前記リードのインナーリードとアウターリードの表面に金属メッキ層を形成する工程と、前記ダイパッド上に前記半導体チップを搭載する工程と、前記半導体チップと前記インナーリードとを金属細線で接続する工程と、前記ダイパッド上の前記半導体チップと前記金属細線と前記リードとを樹脂封止して前記アウターリードを露出する工程と、隣合う前記アウターリード間に形成された樹脂バリをレーザー照射にて除去する樹脂バリ除去工程と、前記封止樹脂から露出した前記金属メッキ層を除去工程と、前記アウターリードにはんだメッキ層を形成する工程と、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を用いた。
また、前記金属メッキ層に続いて、ライトエッチング工程を施すことを特徴とする樹脂封止型半導体装置の製造方法を用いた。
また、前記リードのインナーリードとアウターリードの表面に金属メッキ層を形成する工程において、前記金属メッキ層を前記リードの上面のみに被覆することを特徴とする樹脂封止型半導体装置の製造方法を用いた。
また、前記リードのインナーリードとアウターリードの表面に金属メッキ層を形成する工程において、前記金属メッキ層を前記リードの上面と側面と底面に被覆することを特徴とする樹脂封止型半導体装置の製造方法を用いた。
また、前記リードのインナーリードとアウターリードの表面に金属メッキ層を形成する工程において、前記インナーリード表面の金属メッキ層と前記アウターリード表面の金属メッキ層は離間していることを特徴とする樹脂封止型半導体装置の製造方法を用いた。
また、前記金属メッキ層が、前記リードの上面のみに被覆されていることを特徴とするリードフレームとした。
また、前記金属メッキ層が、前記リードの上面と側面に被覆されていることを特徴とするリードフレームとした。
そして、前記インナーリード表面の金属メッキ層と前記アウターリード表面の金属メッキ層が離間していることを特徴とするリードフレームとした。
図2(a)は、本発明の第1の実施形態に係る樹脂封止型半導体装置を製造するために用いられるリードフレームの断面図である。ダイパッド1とリード2は離間して配置され、その表面は金属メッキ層8によって被覆されている。
図2(b)は、ダイパッド1の表面に接着剤(図示しない)を介して半導体チップ6を搭載し、半導体チップ6表面の電極(図示しない)とリード2とを金属細線7を用いて電気的に接続している。
ダイパッド1上に半導体チップ6を搭載し、半導体チップ6表面の電極(図示しない)とインナーリード3とを金属細線7で接続し、アウターリード4が露出するように半導体チップ6や金属細線7などを封止樹脂11で封止したものである。アウターリード4の上面には、はんだメッキ層10が被覆されている。
ダイパッド1上に半導体チップ6を搭載し、半導体チップ6表面の電極(図示しない)とインナーリード3とを金属細線7で接続し、アウターリード4が露出するように半導体チップ6や金属細線7などを封止樹脂11で封止したものである。アウターリード4の上面には、はんだメッキ層10が被覆されているが、インナーリード3上の第1の金属メッキ層8とアウターリード4上のはんだメッキ層10は離間して、第1の金属メッキ層8は封止樹脂11によって完全に封止され、その端面から露出することはないため、信頼性が向上する。
2、22 リード
3、23 インナーリード
4、24 アウターリード
5、25 吊りリード
6、26 半導体チップ
7、27 金属細線
8 第1の金属メッキ層
9 第2の金属メッキ層
10、30 はんだメッキ層
11、31 封止樹脂
12、32 タイバー
13 レーザー照射
14、34 付着金属
20、40 リードフレーム
28 金属メッキ層
Claims (12)
- インナーリードとアウターリードをそれぞれ有する複数のリードおよびダイパッドを有するリードフレームを用意する工程と、
前記ダイパッドおよび前記複数のリードの前記インナーリードとアウターリードの表面に金属メッキ層を形成する工程と、
前記金属メッキ層が形成された前記ダイパッド上に前記半導体チップを搭載する工程と、
前記半導体チップと前記インナーリードとを金属細線で接続する工程と、
前記ダイパッド上の前記半導体チップと前記金属細線と前記インナーリードとを封止樹脂により樹脂封止して前記アウターリードを露出する工程と、
隣り合う前記アウターリード間に形成された樹脂バリをレーザー照射にて除去する樹脂バリ除去工程と、
前記封止樹脂から露出した前記金属メッキ層を除去する金属メッキ層除去工程と、
前記金属メッキ層が除去された前記アウターリードにはんだメッキ層を形成する工程と、
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。 - 前記樹脂バリ除去工程は、前記リードからデフォーカスすることを特徴とする請求項1記載の樹脂封止型半導体装置の製造方法。
- 前記金属メッキ層に続いて、ライトエッチング工程を施すことを特徴とする請求項1または請求項2記載の樹脂封止型半導体装置の製造方法。
- 前記インナーリードとアウターリードの表面に金属メッキ層を形成する工程において、前記金属メッキ層を前記リードの上面のみに被覆することを特徴とする請求項1乃至3のいずれか1項記載の樹脂封止型半導体装置の製造方法。
- 前記インナーリードとアウターリードの表面に金属メッキ層を形成する工程において、前記金属メッキ層を前記リードの上面と側面に被覆することを特徴とする請求項1乃至3のいずれか1項記載の樹脂封止型半導体装置の製造方法。
- 前記インナーリードとアウターリードの表面に金属メッキ層を形成する工程において、前記金属メッキ層を前記リードの上面と側面と底面に被覆することを特徴とする請求項1乃至3のいずれか1項記載の樹脂封止型半導体装置の製造方法。
- 前記インナーリードとアウターリードの表面に金属メッキ層を形成する工程において、前記インナーリード表面の金属メッキ層と前記アウターリード表面の金属メッキ層は離間していることを特徴とする請求項4乃至6のいずれか1項記載の樹脂封止型半導体装置の製造方法。
- インナーリードとアウターリードをそれぞれ有する複数のリードおよびダイパッドを有するリードフレームであって、前記インナーリードとアウターリードの表面に同一の金属メッキ層が形成されていることを特徴とするリードフレーム。
- 前記金属メッキ層が、前記リードの上面のみに被覆されていることを特徴とする請求項8記載のリードフレーム。
- 前記金属メッキ層が、前記リードの上面と側面に被覆されていることを特徴とする請求項8記載のリードフレーム。
- 前記金属メッキ層が、前記リードの上面と側面と底面に被覆されていることを特徴とする請求項8記載のリードフレーム。
- 前記インナーリード表面の金属メッキ層と前記アウターリード表面の金属メッキ層が離間していることを特徴とする請求項9乃至11のいずれか1項記載のリードフレーム。
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TW103102120A TWI624883B (zh) | 2013-02-13 | 2014-01-21 | 樹脂密封型半導體裝置之製造方法及樹脂密封型半導體裝置 |
KR1020140012987A KR102139034B1 (ko) | 2013-02-13 | 2014-02-05 | 수지 봉지형 반도체 장치의 제조 방법 및 리드 프레임 |
US14/174,722 US9184116B2 (en) | 2013-02-13 | 2014-02-06 | Method of manufacturing resin-encapsulated semiconductor device, and lead frame |
CN201410048546.4A CN103985644B (zh) | 2013-02-13 | 2014-02-12 | 树脂密封型半导体装置的制造方法以及引脚架 |
US14/741,827 US9679835B2 (en) | 2013-02-13 | 2015-06-17 | Method of manufacturing resin-encapsulated semiconductor device, and lead frame |
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JP6653139B2 (ja) * | 2015-07-24 | 2020-02-26 | 株式会社三井ハイテック | リードフレーム及びその製造方法 |
CN105269730A (zh) * | 2015-09-02 | 2016-01-27 | 成都莱普科技有限公司 | 一种半导体封装体激光去溢料的新工艺 |
KR102673478B1 (ko) | 2016-11-25 | 2024-06-11 | 삼성디스플레이 주식회사 | 표시 장치 및 이의 제조 방법 |
CN109967872B (zh) * | 2019-04-23 | 2021-05-07 | 苏州福唐智能科技有限公司 | 一种半导体激光焊接方法及其焊接结构 |
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CN103985644B (zh) | 2018-01-02 |
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US9184116B2 (en) | 2015-11-10 |
US9679835B2 (en) | 2017-06-13 |
JP6095997B2 (ja) | 2017-03-15 |
KR20140102137A (ko) | 2014-08-21 |
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