JP2009501442A - フレキシブル基材を用いたmemsパッケージとその方法 - Google Patents
フレキシブル基材を用いたmemsパッケージとその方法 Download PDFInfo
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Abstract
Description
本発明は、MEMSデバイスをパッケージングするための処理、その方法を用いて製造されたMEMSパッケージ、より詳細には、フレキシブルで折り畳み可能な基材を用いてMEMSデバイスをパッケージングする方法に関する。
微小電気機械システム(MEMS)素子は、圧力、加速度、音、または光などの物理的現象を電気信号に変換することで知られている。各種のMEMSデバイスは異なる方法で外界と相互作用し、カスタムまたは少なくとも半カスタムのパッケージング解決策を要求する。いわゆるシステムインパッケージ技術では、単一のパッケージ内にマイクロプロセッサ、通信部品、アクチュエータおよびセンサを含むことができるマイクロシステム全体を構成しようとする。しかし、MEMSデバイスのパッケージングは、集積回路のパッケージングとは全く異なる。MEMSデバイスは、いくつかの基本的な処理技術を共有するのにもかかわらずICとは明確に異なっている。パッケージングは、大部分のMEMSデバイスの商品化にとって最大の難問である。用語「MEMSパッケージ」は本書では、少なくとも1つのMEMSデバイスを含むパッケージを意味するために用いられる。
本発明の主な目的は、MEMSデバイスと1つ以上の他の電子回路を含むMEMSパッケージを製造する効率的で非常に製造し易い方法を提供することである。
本発明は、MEMSデバイスおよび1つ以上の電子部品(一般に、特定用途向けIC(ASIC)と1つ以上の受動部品)をパッケージングするための方法を提案する。MEMSデバイスとIC素子は、細長い部分を備えたフレキシブル基材上にまず組み立てられる。MEMSデバイスはIC素子に直接ワイヤボンディングし、寄生効果を最小にする。素子を収容するために金属キャップを取り付けるか、または代替的に金属リングで素子を取り囲む。フレキシブル基材の細長い部分は金属キャップまたはリング上に折り畳まれ、金属キャップまたはリング上に取り付けられてパッケージが完成する。フレキシブル基材上の金属キャップまたはリングと金属層は電気的に接続され、エレクトロマイグレーション(EMI)および高周波(RF)シールド用のファラデ箱を形成する。
Claims (31)
- フレキシブル基材上に配置した少なくとも1つのMEMSデバイスと、
前記少なくとも1つのMEMSデバイスを取り囲む金属構造であって、前記フレキシブル基材に前記金属構造の底面が取り付けられ、前記フレキシブル基材が前記金属構造の上面の上に折り畳まれ、前記金属構造の前記上面に取り付けられることによってMEMSパッケージを形成する金属構造と、
を備えるMEMSパッケージ。 - 前記金属構造が、銅、銅合金、アルミニウム合金、ハンダ付け可能な金属仕上げを備えた鉄合金、無電解メッキまたは塗装のいずれかによって形成された金属仕上げを施したプラスチック、もしくは射出成形またはトランスファ成形のいずれかによって形成した導電性複合材を有する請求項1記載のパッケージ。
- 前記フレキシブル基材が、その両側に銅層とハンダレジスト層とを備えたコアフィルムを有し、前記コアフィルムが、ポリイミド、ポリエチレンポリイミド、ポリテトラフルオロエチレン、または液晶ポリマを有し、前記ハンダレジスト層が、カバーレイまたは感光性エポキシを有する請求項1記載のパッケージ。
- 前記金属構造が、前記少なくとも1つのMEMSデバイスを取り囲む金属リングを有し、前記金属リングが、銅、銅合金、アルミニウム合金、ハンダ付け可能な金属仕上げを備えた鉄合金、無電解メッキまたは塗装のいずれかによって形成された金属仕上げを備えたプラスチック、もしくは射出成形またはトランスファ成形のいずれかによって形成された導電性複合材を有する請求項1記載のパッケージ。
- 前記フレキシブル基材がさらに、その上に金属層を有し、前記少なくとも1つのMEMSデバイスの上下の前記金属層と前記金属リングとが共に、前記少なくとも1つのMEMSデバイスのEMIシールドを提供する請求項4記載のパッケージ。
- 導電性接着剤、または共融PbSn、任意の鉛フリーSnAgまたはSnAgCuを含むハンダ材料によって、もしくは導電性接着剤または非導電性接着剤を備えたハンダの組み合わせによって、前記フレキシブル基材に前記金属リングが取り付けられる請求項4記載のパッケージ。
- 前記金属構造が、前記少なくとも1つのMEMSデバイスを収容する金属キャップを有し、前記金属キャップが、銅、銅合金、アルミニウム合金、ハンダ付け可能な金属仕上げを備えた鉄合金、無電解メッキまたは塗装のいずれかによって形成された金属仕上げを備えたプラスチック、もしくは射出成形またはトランスファ成形のいずれかによって形成された導電性複合材を有する請求項1記載のパッケージ。
- 前記フレキシブル基材がさらに、その上に金属層を有し、前記少なくとも1つのMEMSデバイスの下の前記金属層と前記金属キャップが共に、前記少なくとも1つのMEMSデバイスのEMIシールドを提供する請求項7記載のパッケージ。
- 導電性接着剤、またはハンダ、または導電性接着剤またはハンダと非導電性接着材料の組み合わせによって、もしくは導電性接着剤または非導電性接着剤を備えたハンダの組み合わせによって、前記金属キャップの前記底面において前記フレキシブル基材の一部に前記金属キャップが取り付けられた請求項7記載のパッケージ。
- 接着剤によって、前記金属キャップの前記上面において前記フレキシブル基材に前記キャップが取り付けられた請求項7記載のパッケージ。
- さらに、前記フレキシブル基材上および前記金属構造内に配置された1つ以上の電子部品を有する請求項1記載のパッケージ。
- さらに、前記1つ以上の電子部品と前記少なくとも1つのMEMSデバイスの間にワイヤボンディング接続部を有する請求項11記載のパッケージ。
- 前記フレキシブル基材が、前記MEMSデバイスと前記パッケージの外側の環境との間の相互作用を可能にする開口部を有し、前記開口部が前記フレキシブル基材上の前記金属層用のビア接続としても機能する請求項1記載のパッケージ。
- さらに、前記フレキシブル基材の外面上に表面実装パッドを有し、前記開口部と反対側の前記フレキシブル基材の側面に前記表面実装パッドが配置された請求項13記載のパッケージ。
- 前記フレキシブル基材がさらにフレキシブル層上に積層したリジッド層を有し、前記折り畳み部がフレキシブルであり、他の部分がリジッドである請求項1記載のパッケージ。
- 前記リジッド層が、FR−4層を有する請求項15記載のパッケージ。
- 前記金属構造に取り付けられるように、少なくとも一つの側から前記フレキシブル基材を折り畳むことができる請求項1記載のパッケージ。
- MEMSパッケージの製造方法であって、
フレキシブル基材上に少なくとも1つのMEMSデバイスを実装するステップと、
前記少なくとも1つのMEMSデバイスを取り囲む前記フレキシブル基材に金属構造の底面を取り付けるステップと、
前記金属構造の上面の上に前記フレキシブル基材を折り畳み、前記金属構造の前記上面に前記フレキシブル基材を取り付け、それによって前記MEMSパッケージを形成するステップと、
を含む方法。 - 前記金属構造が前記少なくとも1つのMEMSデバイスを取り囲む金属リングを有し、前記金属リングが、銅、銅合金、アルミニウム合金、ハンダ付け可能な金属仕上げを備えた鉄合金、無電解メッキまたは塗装のいずれかによって形成された金属仕上げを施されたプラスチック、もしくは射出成形またはトランスファ成形のいずれかによって形成された導電性複合材を有する請求項18記載の方法。
- 前記フレキシブル基材がコアフィルムと金属層を有し、前記少なくとも1つのMEMSデバイスの上下の前記金属層と前記金属リングが共に、前記少なくとも1つのMEMSデバイスのEMIシールドを提供する請求項19記載の方法。
- 前記金属構造が前記少なくとも1つのMEMSデバイスを収容する金属キャップを有し、前記金属キャップが、銅、銅合金、アルミニウム合金、ハンダ付け可能な金属仕上げを備えた鉄合金、無電解メッキまたは塗装のいずれかによって形成した金属仕上げを備えたプラスチック、もしくは射出成形またはトランスファ成形のいずれかによって形成した導電性複合材を有する請求項18記載の方法。
- 前記フレキシブル基材がコアフィルムと金属層を有し、前記少なくとも1つのMEMSデバイスの下の前記金属層と前記金属キャップが共に、前記少なくとも1つのMEMSデバイスのEMIシールドを提供する請求項21記載の方法。
- 前記フレキシブル基材が、フレキシブル材料の上面に上部金属層を有し、前記フレキシブル材料の底面に底部金属層を有する請求項18記載の方法。
- 前記フレキシブル材料が、ポリイミド、ポリエチレンポリイミド、液晶ポリマ、またはポリテトラフルオロエチレンを有する請求項23記載の方法。
- 前記上部および底部金属層が、ニッケルと金をメッキした銅を有する請求項23記載の方法。
- さらに、前記上部および底部金属層のそれぞれの表面にハンダレジスト層を形成し、前記ハンダレジスト層をパターンニングするステップを含み、前記ハンダレジスト材料がカバーレイまたは感光性エポキシを有する請求項23記載の方法。
- さらに、前記フレキシブル基材上および前記金属構造内に1つ以上の電子部品を実装するステップを含む請求項18記載の方法。
- 前記フレキシブル基材を折り畳むステップの後に、さらに、
前記少なくとも1つのMEMSデバイスから反対側の前記フレキシブル基材の外面に表面実装パッドを提供するステップと、
前記表面実装バッドにおいて前記パッケージに応用プリント回路基板を取り付けるステップと、
を含む請求項18記載の方法。 - さらに、前記フレキシブル基材のフレキシブル層にリジッド層を積層するステップを含み、前記折り畳み部がフレキシブルであり、他の部分がリジッドである請求項18記載の方法。
- 前記リジッド層が、FR−4材料を有する請求項29記載の方法。
- 前記フレキシブル基材を前記折り畳むステップが、前記金属構造の少なくとも一つの側から上側へ行われる請求項18記載の方法。
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KR20080039417A (ko) | 2008-05-07 |
WO2007010361A3 (en) | 2007-08-23 |
US20070013036A1 (en) | 2007-01-18 |
JP4853975B2 (ja) | 2012-01-11 |
US20070013052A1 (en) | 2007-01-18 |
WO2007010361A8 (en) | 2008-03-06 |
WO2007010361A2 (en) | 2007-01-25 |
US7202552B2 (en) | 2007-04-10 |
US7692288B2 (en) | 2010-04-06 |
KR101295979B1 (ko) | 2013-08-13 |
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