JP6415365B2 - 半導体パッケージ - Google Patents
半導体パッケージ Download PDFInfo
- Publication number
- JP6415365B2 JP6415365B2 JP2015054934A JP2015054934A JP6415365B2 JP 6415365 B2 JP6415365 B2 JP 6415365B2 JP 2015054934 A JP2015054934 A JP 2015054934A JP 2015054934 A JP2015054934 A JP 2015054934A JP 6415365 B2 JP6415365 B2 JP 6415365B2
- Authority
- JP
- Japan
- Prior art keywords
- semiconductor package
- conductive layer
- disposed
- circuit board
- package
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000004065 semiconductor Substances 0.000 title claims description 219
- 239000011347 resin Substances 0.000 claims description 68
- 229920005989 resin Polymers 0.000 claims description 68
- 238000007789 sealing Methods 0.000 claims description 55
- 239000010949 copper Substances 0.000 claims description 17
- 239000000853 adhesive Substances 0.000 claims description 8
- 230000001070 adhesive effect Effects 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 4
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 239000000758 substrate Substances 0.000 description 17
- 229910000679 solder Inorganic materials 0.000 description 15
- 238000012546 transfer Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 8
- 238000012986 modification Methods 0.000 description 8
- 230000004048 modification Effects 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000007257 malfunction Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 238000005530 etching Methods 0.000 description 4
- 230000020169 heat generation Effects 0.000 description 4
- 230000015654 memory Effects 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910007637 SnAg Inorganic materials 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000004643 cyanate ester Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
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- H01L25/00—Assemblies consisting of a plurality of semiconductor or other solid state devices
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- H01L25/04—Assemblies consisting of a plurality of semiconductor or other solid state devices all the devices being of a type provided for in a single subclass of subclasses H10B, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
- H01L25/065—Assemblies consisting of a plurality of semiconductor or other solid state devices all the devices being of a type provided for in a single subclass of subclasses H10B, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H10D89/00
- H01L25/0657—Stacked arrangements of devices
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/48—Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the groups H01L21/18 - H01L21/326 or H10D48/04 - H10D48/07
- H01L21/4814—Conductive parts
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Description
本発明の実施形態1に係る積層型半導体パッケージ100の概要について、図1乃至図3を参照しながら、詳細に説明する。
図1は、本発明の実施形態1に係る積層型半導体パッケージ100の、図3におけるA−A’断面図を示したものである。図1を参照すると、第1の半導体パッケージ10と第2の半導体パッケージ20が半田ボール31を介して接合され、第1の半導体パッケージ10の上に第2の半導体パッケージ20が積層されていることがわかる。
本発明の実施形態1に係る積層型半導体パッケージ100は、第1の半導体パッケージ10に、導電層14及びサーマルビア15が配置される。
本発明の実施形態1に係る積層型半導体パッケージ100の変形例1を、図4を参照しながら、詳細に説明する。
本発明の実施形態1に係る積層型半導体パッケージ100の変形例2を、図5及び図6を参照しながら、詳細に説明する。
本発明の実施形態2に係る積層型半導体パッケージ100の概要について、図7及び図8を参照しながら詳細に説明する。
本発明の実施形態3に係る積層型半導体パッケージ100の概要について、図9を参照しながら詳細に説明する。
本発明の実施形態4に係る積層型半導体パッケージ100の概要について、図10を参照しながら説明する。
本発明の実施形態5に係る積層型半導体パッケージ100の概要について、図11及び図12を参照しながら詳細に説明する。
本発明の実施形態6に係る積層型半導体パッケージ100の概要について、図13及び図14を参照しながら詳細に説明する。
以下、従来技術に係るPoPと、本発明の実施形態1、実施形態2及び実施形態5に対応する実施例1〜3について、放熱効果をシミュレーション解析した結果を述べる。
比較例の解析対象は、従来技術に係る上下二層のPoPである。上段パッケージは216pinBGAとし、チップサイズを10.0[mm]×10.0[mm]×0.10[mmt]、発熱量を1.5[W]とした。また、下段パッケージは312pinBGAとし、チップサイズを7.0[mm]×7.0[mm]×0.08[mmt]、発熱量を2.5[W]とした。さらに、実装基板としてJEDEC標準4層基板(101.5[mm]×114.5[mm]×1.6[mmt])、環境温度を25[degC]、解析パラメータをTj(各チップの最高温度[degC])とした。上段パッケージの基板は2層(SR:0.03、Cu:0.02、コア:0.05、Cu:0.02、SR:0.03)とし、層厚は0.15[mm]とした。上段パッケージの基板とチップは、ボンディングワイヤ(ワイヤ直径:18[μm]、平均長さ:1.5[mm]、本数:300本、材質:Cu)で接続するものとした。上段パッケージの樹脂モールドは厚さを0.4[mm]、熱伝導率を0.6[W/mK]とした。上段パッケージの基板のうち配線層で覆われた部分の割合は、Top(L1):30%、Bottom(L2):40%とした。下段パッケージの基板は4層(SR:0.03、Cu:0.02、コア:0.05、Cu:0.02、コア:0.06、Cu:0.02、コア:0.05、Cu:0.02、SR:0.03)とし、層厚は0.3[mm]とした。下段パッケージの基板とチップは、バンプ(寸法:27×49[μm]、厚さ:43[μm]、数:742pin、材質:Cu(30μm厚)+SnAg(13μm厚)。SnAgが基板と接続する。)とした。下段パッケージの樹脂モールドは、厚さを0.25[mm]、熱伝導率を0.6[W/mK]とした。下段パッケージの基板のうち配線層で覆われた部分の割合は、Top(L1):30%、L2:80%、L3:80%、Bottom(L4):40%とした。上段パッケージと下段パッケージを接続する半田ボールの厚さを0.02[mm]、下段パッケージと実装基板とを接続する半田ボールの厚さを0.2[mm]とし、それぞれの半田ボールの熱伝導率は64.2[W/mK]とした。
実施例1は、本発明の実施形態1に対応しており、下段パッケージの上面に導電層を配置した。導電層の面積は10.0[mm]×10.0[mm]、厚さは0.05[mm]、材質はCu(熱伝導率390[W/mK])とした。また、サーマルビアの直径を0.15[mm]、材質をCuとし、下段パッケージのチップ周辺で、ビア16の内側に1周分、0.4[mm]ピッチでフルに、計96個配置した。その他の構成は、比較例と同様である。
実施例2は、本発明の実施形態2に対応しており、下段パッケージの上面及び側面に導電層を配置し、側面の導電層は実装基板に接続させた。側面に導電層を配置し、実装基板に接続させたこと以外は、実施例1と同様である。
実施例3は、本発明の実施形態5に対応しており、下段パッケージの封止樹脂の内部に導電層を配置し、導電層は接着材を介してチップと接している。ここで、導電層は、寸法が10.0×10.0×0.1[mm]であり、材質はCu(熱伝導率390[W/mK])とした。また、導電層とチップを接続する接着剤は、厚さ0.01[mm]、熱伝導率を60[W/mK]とし、チップ上面の全体に塗布されているものとした。その他の構成は、実施例1と同様である。
表1に、比較例、実施例1、実施例2及び実施例3について、放熱効果を解析した結果を示す。ここで、Tjはチップの最高温度、θJAはθJA=(Tj−Ta)/Powerの関係式で表現される熱抵抗、Taは環境温度(25[degC])、Powerは上段チップ及び下段チップの合計消費電力4[W]である。θJA変化率は、比較例の熱抵抗と各実施例の熱抵抗とを比較した変化率を表している。
11:第1の回路基板
12:第1の半導体素子
13:封止樹脂
14:導電層
15:サーマルビア
16:ビア
17:接合用電極端子
18:配線
19:導電部材
20:第2の半導体パッケージ
21:第2の回路基板
22:第2の半導体素子
23:封止樹脂
31:半田ボール
32:樹脂コアボール
34:ボンディングワイヤ
35:半田ボール
60:断熱層
70:配線基板
100:積層型半導体パッケージ
Claims (8)
- 第1の回路基板と、
前記第1の回路基板に第1の半導体素子が実装された第1の半導体パッケージと、
第2の回路基板と、
前記第2の回路基板に第2の半導体素子が実装され、前記第1の半導体パッケージに積層された第2の半導体パッケージと、
前記第1の半導体素子を封止する封止樹脂と、
前記封止樹脂に接して配置される導電層と、
前記第1の半導体パッケージと前記第2の半導体パッケージとを接合する複数の接合用電極端子と、
前記導電層と接続し前記第1の回路基板上に配置されるサーマルビアと、を有し、
前記複数の接合用電極端子は前記第1の半導体素子の周囲に配置され、
前記導電層は、前記第1の半導体素子の全体を覆い、一部の領域が前記接合用電極端子の領域に延長され、前記サーマルビアは前記複数の接合用電極端子の一部が置換えられて配置されている積層型半導体パッケージ。 - 前記導電層は、前記封止樹脂の上に配置されることを特徴とする、請求項1に記載の積層型半導体パッケージ。
- 前記導電層は、前記複数の接合用電極端子の内側に配置される、
ことを特徴とする請求項2に記載の積層型半導体パッケージ。 - 前記導電層は、銅又は銅合金であることを特徴とする請求項1に記載の積層型半導体パッケージ。
- 前記サーマルビアは、前記封止樹脂内の第1のサーマルビアと、前記第1の回路基板に形成される第2のサーマルビアと、を有し、
前記第1のサーマルビアと前記第2のサーマルビアとの間に、前記第1の半導体素子と接続される配線が介在していることを特徴とする請求項1に記載の積層型半導体パッケージ。 - 前記複数の接合用電極端子は樹脂コアボールを有することを特徴とする請求項2に記載の積層型半導体パッケージ。
- 前記導電層は前記封止樹脂に覆われていることを特徴とする、請求項1に記載の積層型半導体パッケージ。
- 前記導電層は前記第1の半導体素子上に接着剤又はスペーサを介して配置されることを特徴とする、請求項7に記載の積層型半導体パッケージ。
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