JP2004260138A - 半導体装置及びその製造方法 - Google Patents
半導体装置及びその製造方法 Download PDFInfo
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- JP2004260138A JP2004260138A JP2003411921A JP2003411921A JP2004260138A JP 2004260138 A JP2004260138 A JP 2004260138A JP 2003411921 A JP2003411921 A JP 2003411921A JP 2003411921 A JP2003411921 A JP 2003411921A JP 2004260138 A JP2004260138 A JP 2004260138A
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- semiconductor device
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- semiconductor chip
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Abstract
【解決手段】 半導体チップ20と、このチップがフリップチップ接続された搭載用基板10と、第1の樹脂で形成されたアンダーフィル部40aとフィレット部40bを有する第1充填部40と、補強材30と、第1の接着材42と、蓋部31と、熱膨張率が第1の樹脂よりも小さい第2の樹脂で形成された第2充填部41を備える。
【選択図】 図1
Description
図1は本発明の半導体装置の第1の実施形態を示す図で、(a)及び(b)は、それぞれ蓋部を外した状態の平面図、及び(a)のA1−A1’線に沿った位置で蓋部が取り付けられた状態の断面図である。図1(a),(b)を参照すると、本実施形態の半導体装置1は、半導体チップ20と、半導体チップ20が第1の面にフリップチップ接続された搭載用基板10と、半導体チップ20と搭載用基板10との対向領域の隙間に第1の樹脂が充填されたアンダーフィル部40aと半導体チップ20と搭載用基板10との対向領域から第1の樹脂が延在したフィレット部40bとを有する第1充填部40と、半導体チップ20を囲む枠状の補強材30と、この補強材30の第1の端面を搭載用基板10に接着する第1の接着材42と、補強材30及び補強材30で囲まれた領域を覆う蓋部31と、蓋部31を半導体チップ20の裏面及び補強材31の第1の端面と反対側の第2の端面に接着する第2の接着材43と、補強材30,半導体チップ20の側面,搭載用基板10及び第1の樹脂からなるフィレット部40bで囲まれる空間に第2の樹脂を充填して形成された第2充填部41を備える。以下、具体的に説明する。
表−1 各樹脂の特性
熱膨張率 (ppm) 弾性率 (GPa)
第1の接着材 16〜22 11〜12
第1の樹脂 30〜32 9〜10
第2の樹脂 8〜16 11〜28
第2の接着材 50〜100 3〜9
図2は、本発明の半導体装置の第2の実施形態の断面図で、図1(b)に相当する図である。図2を参照すると、本実施形態の半導体装置1aの構成は半導体装置1の構成とほとんど同じであるが、唯一異なる点は搭載用基板10へ補強材30を接着する第1の接着材42aとして第2の樹脂を用いたことである。この半導体装置1aにおいては、補強材30を接着する第1の接着材42aに熱膨張率が8〜16ppm程度で弾性率が11〜28GPaの第2の樹脂を用いることによって、半導体チップ20直下の搭載用基板10の収縮の程度をより緩和することができ、搭載用基板10の反りを抑制できる。尚、本実施形態の半導体装置1aの製造方法は、第1の接着材40の代わりに第2の樹脂からなる第1の接着材40aを用いるだけで、他の工程は第1の実施形態の半導体装置1の製造方法と同じである。
図3は、本発明の半導体装置の第3の実施形態を示す図で、(a)乃至(c)はそれぞれ蓋部を外した状態の平面図、(a)のA2−A2’線に沿った位置で蓋部が取り付けられた状態の断面図及び(b)の補強材と搭載用基板との接着部の部分拡大断面図である。図3(a)乃至(c)を参照すると、本実施形態の半導体装置1bは、半導体チップ20と、半導体チップ20が第1の面にフリップチップ接続された搭載用基板10と、半導体チップ20と搭載用基板10との対向領域の隙間に第1の樹脂が充填されたアンダーフィル部40aと半導体チップ20と搭載用基板10との対向領域から第1の樹脂が延在したフィレット部40bとを有する第1充填部40と、半導体チップ20を囲む枠状の補強材32と、この補強材32の第1の端面を搭載用基板10に接着する第1の接着材42と、補強材32及び補強材32で囲まれた領域を覆う蓋部31と、蓋部31を半導体チップ20の裏面及び補強材31の第1の端面と反対側の第2の端面に接着する第2の接着材43と、補強材32,半導体チップ20の側面,搭載用基板10及び第1充填部40のフィレット部40bで囲まれる空間に第2の樹脂を充填して形成した第2充填部41を備える。第3の実施形態の半導体装置1bの構成は半導体装置1の構成とほとんど同じであるが、唯一異なる点は、補強材32の第1の端面と搭載用基板10との間の隙間が凹凸形状となっている点である。半導体装置1の補強材30の第1の端面は、全面が平面となっているが、半導体装置1bの補強材32の第1の端面の形状は、例えば渦巻状あるいは格子状の溝等により凸部50と凹部が交互に形成された形状となっている。このとき、その溝または凹部の深さは、適宜設定できるが半導体チップ20と搭載用基板10との隙間であるが50〜200μm程度が好ましい。補強材32の材料は、Cu、SUS(フェライト系ステンレス鋼)、アルミナ、シリコン、窒化アルミニウム、エポキシ樹脂等を含むグループの中から選択できる。この補強材32と搭載用基板10の接着は第1の端面の凹部に第1の接着材42を充填して接着している。尚、この場合も第1の接着材42の代わりに第2の樹脂を第1の端面の凹部に充填して接着してもよい。
図4は、本発明の半導体装置の第4の実施形態を示す断面図であり、第1の実施形態の図1(b)に相当する図である。図4を参照すると、本実施形態の半導体装置1cは、補強材33の開口部の形状が逆テーパ状に形成されている点が、第1の実施形態乃至第3の実施形態の各半導体装置1,1a,1bと異なるだけで、他の構成は半導体装置1,1a,1bと同じ構成であってよい。半導体装置1cでは、補強材33の庇部分が第2の樹脂の上に覆い被さっているので、フィレット部40bと第2充填部41が蓋部31側に変形するのを防止する効果がある。尚、第4の実施形態の半導体装置1cの製造方法は、第1の実施形態乃至第3の実施形態の各半導体装置の製造方法と同じであり、説明は省略する。
図6は、本発明の半導体装置の第6の実施形態の断面図で、図1(b)に相当する図である。本実施形態の半導体装置1eは、第1の実施形態の半導体装置1の補強材30を、有機材料の樹脂で形成された補強材35に替えただけで、他の構成は全て半導体装置1と同じである。本実施形態の半導体装置1eの製造方法は、樹脂製の補強材35を例えばトランスファー封止により予め製作して準備しておけば、その他の製造手順は図13(a)乃至(e)並びに図14(a)及び(b)に示すように第1の実施形態の半導体装置1の製造方法と同じであり、詳細な説明は省略する。概略を説明すれば、先ず搭載用基板10に第1の接着材42を塗布し、樹脂製補強材35を載置して仮キュアする。次に半導体チップ20を内部ランド電極11にフリップチップ接続して、第1の樹脂を充填し仮キュアして第1充填部40を形成する。次に、半導体チップ20の側面,補強材35の内壁,搭載用基板10及びフィレット部40bで囲まれた空間に第2の樹脂を注入・充填して第2充填部41を形成した後、半導体チップ20の裏面と補強材35の第2の端面に第2の接着材43を塗布して蓋部31を載置し、本キュアして第1の接着材42、第1充填部40の第1の樹脂、第2充填部41の第2の樹脂及び第2の接着材43を完全に硬化させて半導体装置1eが完成する。
図7は、本発明の半導体装置の第7の実施形態の断面図で、図1(b)に相当する図である。本実施形態の半導体装置1fは、第1の実施形態の半導体装置1の補強材30を、有機材料の樹脂で形成され且つ開口部が逆テーパ状の補強材36に替えただけで、他の構成は全て半導体装置1と同じである。本実施形態の半導体装置1fでは第2充填部41の上に補強材36が庇状に覆い被さっている。この構造によってフィレット部40bと第2充填部41が蓋部31側に変形するのを抑制できる効果がある。本実施形態の半導体装置1fの製造方法は、第6の実施形態の半導体装置1eの製造方法と同じである。
10 搭載用基板
11 内部ランド電極
12 外部ランド電極
13 半田バンプ
15 基板内配線
20 半導体チップ
21 チップ電極
22 バンプ電極
30 補強材
31,32,33,34,35,36 蓋部
34a 溝部
40 第1充填部
40a アンダーフィル部
40b フィレット部
41 第2充填部
42,42a 第1の接着材
43 第2の接着材
47 空隙
50 凸部
60 加温圧入ノズル
Claims (22)
- 半導体チップと、
この半導体チップが第1の面にフリップチップ接続された搭載用基板と、
前記半導体チップと前記搭載用基板との間に第1の樹脂が充填されたアンダーフィル部とこのアンダーフィル部から前記第1の樹脂が延在したフィレット部とを有する第1充填部と、
前記半導体チップを囲む枠状の補強材と、
この補強材の第1の端面を前記搭載用基板に接着する第1の接着材と、
前記補強材で囲まれた領域を覆う蓋部と、
この蓋部を前記半導体チップの裏面及び前記補強材の第1の端面と反対側の第2の端面に接着する第2の接着材と、
前記半導体チップの側面,前記搭載用基板及び前記フィレット部で囲まれる空間に前記第1の樹脂と異なる第2の樹脂を充填した第2充填部と、を備えることを特徴とする半導体装置。 - 前記半導体チップの平面形状が矩形であり、前記第1の端面と前記搭載用基板との間であって前記半導体チップの平面形状の仮想的な対角線の延長部との交差領域を含む所定の対角領域に前記第2の樹脂が充填されている請求項1記載の半導体装置。
- 前記補強材は、前記第1の端面の前記対角領域が凹部となっている請求項2記載の半導体装置。
- 前記第1の接着材の厚さは、厚い部分と薄い部分が混在している請求項1乃至3いずれか1項に記載の半導体装置。
- 前記第1の端面は、前記搭載用基板に対向して凹部と凸部とが混在している請求項1乃至4いずれか1項に記載の半導体装置。
- 前記搭載用基板と前記凹部との間に前記第1の接着材が充填されている請求項5記載の半導体装置。
- 前記搭載用基板と前記凹部との間に前記第2の樹脂が充填されている請求項5記載の半導体装置。
- 前記搭載用基板が前記補強材と対向する領域に第1の金属層を備えると共に、前記補強材が前記凸部の表面に第2の金属層を備え、前記搭載用基板と前記凸部とが低融点合金で接続されている請求項5乃至7いずれか1項に記載の半導体装置。
- 前記第2充填部は、前記補強材の内壁と、前記フィレット部と、前記搭載用基板と前記半導体チップの側壁に接触している請求項1乃至8いずれか1項に記載の半導体装置。
- 前記第2充填部が、蓋部の内壁とも接触している請求項9記載の半導体装置。
- 前記第2の樹脂の弾性率は、前記第1の樹脂の弾性率よりも大きい請求項1乃至10いずれか1項に記載の半導体装置。
- 前記第2の樹脂の熱膨張率が前記第1の樹脂の熱膨張率よりも小さい請求項1乃至11いずれか1項に記載の半導体装置。
- 前記第1の接着材が前記第2の樹脂からなる請求項1乃至12いずれか1項に記載の半導体装置。
- 前記第2の樹脂の熱膨張率が前記第1の接着材の熱膨張率よりも小さい請求項1乃至12いずれか1項に記載の半導体装置。
- 前記補強材は、Cu、SUS、Al、アルミナ、シリコン、窒化アルミニウム及び樹脂を含むグループの中から選択された材料で形成されている請求項1乃至14いずれか1項に記載の半導体装置。
- 前記第1の樹脂と前記第2の樹脂はいずれも、エポキシ系、ポリオレフィン系、シリコン系、シアネートエステル系、ポリイミド系、ポリノルボルネン系を含む樹脂群の中から選択された樹脂を主成分とする請求項1乃至15いずれか1項に記載の半導体装置。
- 前記搭載用基板と前記第1の端面の間に、前記第1の接着材と異なるギャップ部材が部分的に配置されている請求項1乃至4いずれか1項に記載の半導体装置。
- 前記ギャップ部材は、低融点合金からなる請求項17記載の半導体装置。
- 搭載用基板に補強材を接着する工程と、搭載用基板に半導体チップを接続する工程と、第1の樹脂を充填・硬化する工程と、第2の樹脂を充填・硬化する工程と、蓋部を取り付ける工程と、半田バンプを接続する工程とを備え、少なくとも前記搭載用基板に補強材を接着する工程を第1番目の工程とし、前記搭載用基板に半導体チップを接続する工程を2番目の工程としたことを特徴とする半導体装置の製造方法。
- 前記搭載用基板に補強材を接着する工程は第1の接着材を前記搭載用基板に塗布するステップと、前記補強材を前記第1の接着材の上に載置した後前記第1の接着材を半硬化させるステップを含み、
前記第1の樹脂を充填・硬化する工程は前記第1の樹脂を前記半導体チップと前記搭載用基板との隙間に充填するステップと、前記第1の樹脂を半硬化させるステップを含み、
前記第2の樹脂を充填・硬化する工程は前記第2の樹脂を充填するステップと、前記第2の樹脂を半硬化させるステップを含み、
前記蓋部を取り付ける工程は第2の接着材を塗布するステップと、前記蓋部を前記第2の接着材の上に載置するステップと、前記第2の接着材を硬化させるステップを含み、
前記第2の接着材を硬化させるステップにおいて、前記第1の接着材,前記第2の接着材,前記第1の樹脂及び前記第2の樹脂の全てが本硬化される請求項19記載の半導体装置の製造方法。 - 搭載用基板に補強材を接着する工程と、搭載用基板に半導体チップを接続する工程と、第1の樹脂を充填・硬化する工程と、第2の樹脂を充填・硬化する工程と、蓋部を取り付ける工程と、半田バンプを接続する工程とを備え、前記第2の樹脂の充填・硬化する工程は蓋部を取り付ける工程の後に実施することを特徴とする半導体装置の製造方法。
- 前記搭載用基板に補強材を接着する工程は第1の接着材を前記搭載用基板に塗布するステップと、前記補強材を前記第1の接着材の上に載置した後前記第1の接着材を半硬化させるステップを含み、
前記第1の樹脂を充填・硬化する工程は前記第1の樹脂を前記半導体チップと前記搭載用基板との隙間に充填するステップと、前記第1の樹脂を半硬化させるステップを含み、
前記第2の樹脂を充填・硬化する工程は前記第2の樹脂を充填するステップと、前記第2の樹脂を半硬化させるステップを含み、
前記蓋部を取り付ける工程は第2の接着材を塗布するステップと、前記蓋部を前記第2の接着材の上に載置するステップと、前記第2の接着材を硬化させるステップを含み、
前記第2の樹脂を硬化させるステップにおいて、前記第1の接着材,前記第2の接着材,前記第1の樹脂及び前記第2の樹脂の全てが本硬化される請求項21記載の半導体装置の製造方法。
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2004
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- 2004-02-02 TW TW093102258A patent/TWI243457B/zh not_active IP Right Cessation
- 2004-02-02 KR KR1020040006563A patent/KR100549313B1/ko not_active IP Right Cessation
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2010
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Also Published As
Publication number | Publication date |
---|---|
JP4390541B2 (ja) | 2009-12-24 |
US7728440B2 (en) | 2010-06-01 |
KR100549313B1 (ko) | 2006-02-02 |
US8324718B2 (en) | 2012-12-04 |
US20040150118A1 (en) | 2004-08-05 |
TW200423338A (en) | 2004-11-01 |
TWI243457B (en) | 2005-11-11 |
KR20040071067A (ko) | 2004-08-11 |
US20100230797A1 (en) | 2010-09-16 |
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