JP2011233901A - QFN(QuadFlatNonLeadedSemiconductorPackage)半導体パッケージ及びその製造方法、並びに該半導体パッケージの製造に用いられる金属板 - Google Patents
QFN(QuadFlatNonLeadedSemiconductorPackage)半導体パッケージ及びその製造方法、並びに該半導体パッケージの製造に用いられる金属板 Download PDFInfo
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- JP2011233901A JP2011233901A JP2011099932A JP2011099932A JP2011233901A JP 2011233901 A JP2011233901 A JP 2011233901A JP 2011099932 A JP2011099932 A JP 2011099932A JP 2011099932 A JP2011099932 A JP 2011099932A JP 2011233901 A JP2011233901 A JP 2011233901A
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- pad
- sectional area
- die
- bump solder
- semiconductor package
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 62
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 53
- 239000002184 metal Substances 0.000 title claims abstract description 53
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 8
- 229910000679 solder Inorganic materials 0.000 claims abstract description 129
- 239000003566 sealing material Substances 0.000 claims abstract description 41
- 238000003825 pressing Methods 0.000 claims description 18
- 238000003780 insertion Methods 0.000 claims description 7
- 230000037431 insertion Effects 0.000 claims description 7
- 241000272201 Columbiformes Species 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 16
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 12
- 229910052759 nickel Inorganic materials 0.000 description 8
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 7
- 229910052737 gold Inorganic materials 0.000 description 7
- 239000010931 gold Substances 0.000 description 7
- 229910052763 palladium Inorganic materials 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 238000005530 etching Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005476 soldering Methods 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008393 encapsulating agent Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
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Abstract
【解決手段】ダイパッド11及び複数のバンプソルダーパッド13を得るために金属板をプレスするとともに、該バンプソルダーパッド13の少なくとも一つの横断面積をその下方にある他の一つの横断面積よりも大きくし、該ダイパッド11の少なくとも一つの横断面積をその下方にある他の一つの横断面積よりも大きくすることで、該ダイパッド11及びバンプソルダーパッド13が封止材16内に嵌設されるようにする。また、本発明は、封止材16が形成された後に金属板を取り除くようにしたため、バンプソルダーパッド13の底面にオーバーフローすることをさらに回避することができる。
【選択図】図7
Description
(第1の実施例)
図1ないし図9は、本発明に係るQFN半導体パッケージの製造方法を説明するための図である。
(第2の実施例)
本実施例は、プレス方法が異なっている以外は、前述した製造方法とほぼ同様である。図10ないし図12に示すプレスによるダイパッド及びバンプソルダーパッドの形成工程は、まず金属板20を、上金型221及び下金型222を含む金型22でプレスすることにより複数のダイパッド29及びバンプソルダーパッド23を形成する工程と、再び、ダイパッド29及びバンプソルダーパッド23の頂面を押圧することにより、ダイパッド29及びバンプソルダーパッド23の厚さの範囲内において、たとえバンプソルダーパッド23の頂面が最大面積ではなくても、少なくとも一つの横断面積がその下方にある他の一つの横断面積よりも大きい関係がなお存在し、封止材の形成後に、バンプソルダーパッド23が封止材の中に嵌設されるようにし、同様に、ダイパッド29の少なくとも一つの横断面積をその下方にある他の一つの横断面積よりも大きくする工程と、を備える。具体的に言えば、図11に示すように、他の上金型221’を再びダイパッド29及びバンプソルダーパッド23の頂面に押圧させ、最後に脱型することによりバンプソルダーパッド23を有する金属板20を得ることができる。
(第3の実施例)
本実施例は、ダイパッドの外形が異なっている以外は、前述した製造方法とほぼ同様である。図13に示すように、金属板30をプレスする工程は、ダイ搭載領域31(図14参照)を金型32でプレスすることによりダイパッド38を形成する工程をさらに備えてもよい。ダイパッド38は、複数のバンプパッド381からなり、その外形はバンプソルダーパッド33と同じであっても良い。同様に、ダイパッド38の厚さの範囲内において、ダイパッド38の少なくとも一つの横断面積がその下方にある他の一つの横断面積よりも大きい。
図8に示すように、前記半導体パッケージは、封止材16の底面に形成され、各前記ダイパッド19及びバンプソルダーパッド13が対応して露出するための開口181を複数有するソルダーレジスト層18をさらに備えてもよい。
10、20、30 金属板
11、31 ダイ搭載領域
12、22、32 金型
121 雄金型
122 雌金型
123 挿入部材
1221 凹孔
1222 グルーブ
13、23、33 バンプソルダーパッド
131 孔
14、34、42 チップ
15、35、43 ボンディングワイヤ
16、36 封止材
17、37、46 半田ボール
18 ソルダーレジスト層
181 開口
221、221’ 上金型
222 下金型
19、29、38 ダイパッド
381 バンプパッド
40 リードフレーム
41 リード
44 封止材
Claims (12)
- 厚さの範囲内において、少なくとも一つの横断面積がその下方にある他の一つの横断面積よりも大きいダイパッドと、
前記ダイパッドの周辺に設けられ、厚さの範囲内において、少なくとも一つの横断面積がその下方にある他の一つの横断面積よりも大きく、且つ頂面が前記ダイパッドの頂面よりも高い複数のバンプソルダーパッドと、
前記ダイパッドに設けられたチップと、
前記チップ及び各前記バンプソルダーパッドを電気的に接続するためのボンディングワイヤと、
前記ダイパッド、前記バンプソルダーパッド、前記チップ及び前記ボンディングワイヤを被覆することで、前記ダイパッド及び前記バンプソルダーパッドが封止材の中に嵌設され、各前記バンプソルダーパッド及び前記ダイパッドの底面が露出されるようにした封止材と、
を備えることを特徴とするQFN半導体パッケージ。 - 前記バンプソルダーパッドは、鳩尾形又は半鳩尾形であることを特徴とする請求項1に記載のQFN半導体パッケージ。
- 前記ダイパッドは、鳩尾形又は半鳩尾形であることを特徴とする請求項1に記載のQFN半導体パッケージ。
- 前記封止材の底面に形成され、前記ダイパッド及び前記バンプソルダーパッドが対応して露出するための開口を複数有するソルダーレジスト(solder resist)層をさらに備えることを特徴とする請求項1に記載のQFN半導体パッケージ。
- 複数のダイ搭載領域が規定された金属板を準備する工程と、
前記金属板を金型でプレスすることにより、金属板における各前記ダイ搭載領域にダイパッドを形成するとともに、前記ダイ搭載領域の外周に複数のバンプソルダーパッドを形成し、ここで、前記ダイパッド及び前記バンプソルダーパッドの厚さの範囲内において、前記バンプソルダーパッドの少なくとも一つの横断面積をその下方にある他の一つの横断面積よりも大きくし、前記ダイパッドの少なくとも一つの横断面積をその下方にある他の一つの横断面積よりも大きくし、前記バンプソルダーパッドの底面を前記ダイパッドの底面よりも高くする工程と、
各前記ダイパッドの上にチップを設置する工程と、
前記チップ及び前記バンプソルダーパッドをボンディングワイヤにより電気的に接続する工程と、
前記金属板、前記チップ及び前記ボンディングワイヤに封止材を被覆することにより、前記バンプソルダーパッドを前記封止材の中に嵌設させる工程と、
前記金属板の底部を取り除くことにより、前記ダイパッド及び各前記バンプソルダーパッドを互いに離間配置させる工程と、
前記封止材を切断することにより、複数の半導体パッケージを形成する工程と、
を備えることを特徴とするQFN半導体パッケージの製造方法。 - 前記金型は、雄金型、雌金型及び複数の挿入部材を含み、前記雌金型が、アレイ配列された凹孔及び同一列にある前記凹孔を連通するためのグルーブを有し、前記グルーブに前記挿入部材が摺設されることで、前記凹孔の開口面積が前記凹孔の底面積よりも小さくなるようにしたことを特徴とする請求項5に記載のQFN半導体パッケージの製造方法。
- 前記ダイパッド及び前記バンプソルダーパッドをプレス形成する工程は、前記金属板を金型でプレスして複数の前記ダイパッド及び前記バンプソルダーパッドを形成する工程と、前記ダイパッド及び前記バンプソルダーパッドの頂面を押圧することで、前記ダイパッド及び前記バンプソルダーパッドの厚さの範囲内において、前記バンプソルダーパッドの少なくとも一つの横断面積をその下方にある他の一つの横断面積よりも大きくし、前記ダイパッドの少なくとも一つの横断面積をその下方にある他の一つの横断面積よりも大きくする工程と、を含むことを特徴とする請求項5に記載のQFN半導体パッケージの製造方法。
- 前記バンプソルダーパッドの頂面は、前記ダイパッドの頂面よりも高いことを特徴とする請求項5に記載のQFN半導体パッケージの製造方法。
- 前記金属板をプレスする前又はプレスした後に前記金属板の上下表面に金属層を形成する工程をさらに備えることを特徴とする請求項5に記載のQFN半導体パッケージの製造方法。
- 前記バンプソルダーパッドは、鳩尾形又は半鳩尾形であることを特徴とする請求項5に記載のQFN半導体パッケージの製造方法。
- 前記金属板を取り除いた後、前記封止材の底面にソルダーレジスト層を形成し、前記ソルダーレジスト層が各前記ダイパッド及び前記バンプソルダーパッドを対応して露出させるための開口を複数有するようにした工程をさらに備えることを特徴とする請求項5に記載のQFN半導体パッケージの製造方法。
- QFN半導体パッケージの製造に用いられる金属板であって、
前記金属板に一体的に形成され、ダイ搭載領域を区画するように設けられ、厚さの範囲内において、少なくとも一つの横断面積がその下方にある他の一つの横断面積よりも大きい複数のバンプソルダーパッドと、
前記ダイ搭載領域に位置し、厚さの範囲内において、少なくとも一つの横断面積がその下方にある他の一つの横断面積よりも大きいダイパッドと、
各前記バンプソルダーパッドの底面に対応して形成された複数の孔と、
を備えることを特徴とするQFN半導体パッケージの製造に用いられる金属板。
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