JP4572759B2 - 半導体装置及び電子機器 - Google Patents
半導体装置及び電子機器 Download PDFInfo
- Publication number
- JP4572759B2 JP4572759B2 JP2005197393A JP2005197393A JP4572759B2 JP 4572759 B2 JP4572759 B2 JP 4572759B2 JP 2005197393 A JP2005197393 A JP 2005197393A JP 2005197393 A JP2005197393 A JP 2005197393A JP 4572759 B2 JP4572759 B2 JP 4572759B2
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- Prior art keywords
- semiconductor device
- substrate
- passive element
- wiring
- insulating layer
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Description
そこで、特許文献1及び特許文献2には、基板の能動面(主面)にインダクタ素子を形成することにより、半導体装置(電子基板)としての小型化及び高機能化を実現する技術が開示されている。
インダクタ素子等の受動素子が能動素子の近傍に配置されることになるため、能動素子との電気的なカップリングが起こり、能動素子の特性や、この基板を用いた半導体装置全体の特性が悪化する虞があるという問題が生じる。
例えば、上記の技術では、インダクタ素子から漏れた電流でトランジスタ等の特性が変動するという問題が生じてしまう。
本発明の半導体装置は、基板の一方の面に能動領域が設けられる半導体装置であって、前記能動領域に半導体素子が設けられ、前記基板の他方の面に受動素子が設けられ、前記受動素子は、前記基板を貫通する貫通導電部を介して前記一方の面に設けられた電極と電気的に接続され、前記基板の他方の面に、前記能動領域と前記受動素子と挟まれる位置に接地電極膜が設けられることを特徴とするものである。
そのため、本発明では、能動素子の特性やこの電子基板が実装されたシステム全体の特性が悪化することを抑制できる。
これにより、本発明では一方の面の電極を介して容易に他の素子と受動素子との電気接続を確保することが可能になる。
配線パターンを用いて受動素子を形成する場合、受動素子は、複数の層に積層された配線パターンを用いて形成もしくは、接続される構成も採用できる。
この構成では、例えば誘電体層(絶縁層)を挟んだ配線パターンにより、容易にキャパシタ等を形成することができる。
なお、受動素子を配線パターンで形成する構成ではなく、受動素子の機能を有するチップ部品を基板の他方の面に搭載する構成としてもよい。
この構成では、他の電子部品と受動素子、または能動素子との電気的接続を容易に実現することが可能になる。
また、前記基板が前記外部接続端子で互いに接続されて複数積層される構成を採った場合には、複数の基板が積層された多層基板を有するモジュールを容易に形成することができる。
この構成では、基板の他方に面に熱応力が加わっても受動素子の信頼性や寿命の低下を抑制することができる。
また、応力緩和層が絶縁層である場合には、受動素子と能動素子との電気的なカップリングが一層起こりにくくなるため、受動素子の特性等の悪化を防止でき、受動素子からの浮遊容量を低減できる等の効果が得られる。
この構成では、能動素子等、基板の一方の面に設けられた素子と受動素子との間の電磁シールド効果を得ることができる。
これにより、本発明では、能動素子に対して効果的に電磁シールド効果を得ることが可能になるとともに、効果的なノイズ対策を採ることが可能になる。
これにより、本発明では、厚さ等、接地電極膜の諸元を調整することにより、基板の他方の面側に配設される素子のインピーダンスを制御することが可能になる。
これにより、本発明では、受動素子を保護し、腐食や短絡を防止することが可能になる。
この場合、半導体素子としては、能動領域に形成される配線パターンによりトランジスタ等のスイッチング素子を形成する構成や、半導体素子を内蔵する半導体デバイスを能動領域に実装する構成とすることができる。
前記第2の受動素子としてはは、前記基板の一方の面側に配置される配線パターンを用いて形成もしくは、接続される構成や、前記基板の一方の面側に実装されるデバイスに設けられる構成を採用できる。
従って、本発明では、能動素子の特性やこの電子基板が実装されたシステム全体の特性が悪化することを抑制でき、高品質の電子機器を得ることができる。
ここでは、基板の能動領域に半導体素子が設けられ、また受動素子としてキャパシタ及びコイル(インダクタ)が配線パターンを用いて設けられる場合の例を用いて説明する。
図1は、シリコン基板に半導体素子が設けられた半導体装置(電子基板)1の断面図である。
この半導体装置1は、図1に示すように、シリコン基板(基板)10と、シリコン基板10の第1の面(一方の面)10aに形成され、プリント配線板等の外部機器Pに電気的に接続される接続部20と、シリコン基板10の第2の面(他方の面)10bに形成され、後述する表面実装用のランドを有する配線部41とを備えている。
また、シリコン基板10の第2の面10bの表面には、溝11が形成された領域以外の領域に裏面絶縁層14が形成されている。
なお、シリコン基板10には、図2の平面図に示すように、複数の電極が形成されていても構わないが、本実施形態では、第1電極22及び第2電極23のみについて説明する。また、第2電極23は、第1絶縁層24に覆われていても構わない。
そして、これら第1電極22及び第2電極23が上述した集積回路等の半導体素子と電気的に接続されている。
なお、第1絶縁層24は、酸化珪素(SiO2)、窒化珪素(Si3N4)等の絶縁性材料によって形成されていても良い。
また、配線45においても、絶縁層44上において一部が絶縁層47から露出してランド部(外部接続用端子)49を形成している。
これらキャパシタC及びインダクタLは、図示しない貫通導電部を介して第1の面10a側の第1電極22及び半導体素子に接続されている。
なお、フォトレジスト40をマスクとして用いる構成としたが、これに限ることはなく、例えば、ハードマスクとしてSiO2膜を用いても良く、フォトレジストマスク及びハードマスクを併用しても良い。また、エッチング方法としてはドライエッチングに限らず、ウエットエッチング、レーザ加工、あるいはこれらを併用しても良い。
また、本実施形態では、溝11の内部を導電部12で埋め込んでいるが、完全に埋め込まなくても、溝11の内壁に導電部12を設けて、第2電極23の裏面23aで電気的に接続される形態でも良い。
配線42、45、46が形成されると、図5(b)に示すように、これら配線42、45、46及び下地層14の一部を覆うように絶縁層47を形成する。
そして、周知のフォトリソグラフィ法及びエッチング法により、図5(c)に示すように、配線42、45を覆いランド部48、49に対応する絶縁材料を除去することにより、ランド部48、49を形成する。
特に、本実施の形態では、能動領域に半導体素子が設けられているため、p型またはn型の半導体ウエル層を間に介在させることになり、能動素子と受動素子との電気的なカップリングを一層起こりにくくすることができる。
また、本実施形態では、ランド部48、49を配設しているため、半導体装置1を他の電子部品と容易に接続させることが可能になる。
続いて、半導体装置(電子基板)の第2実施形態について図7を参照して説明する。
この図において、図1乃至図6に示す第1実施形態の構成要素と同一の要素については同一符号を付し、その説明を省略する。
第2実施形態は、接地電極膜Gが成膜された構成となっている。
また、本実施形態では、接地電極膜Gの厚さや大きさ等の諸元を調整することにより、ランド部48、49に接続される電子部品(電子素子)のインピーダンスも制御することも可能である。
次に、半導体装置(電子基板)の第3実施形態について図8を参照して説明する。
図8に示す半導体装置1は、バンプ110を有する半導体素子111が厚さ方向に複数積層されて、図1に示したランド部48、49に接続された積層型半導体装置を形成している。
この場合、半導体素子111としては、第1実施形態と同様に、能動素子及び受動素子の双方を備える構成であっても、受動素子のみを備える構成であってもよい。
上記の構成の半導体装置1では、実装密度をさらに向上させることができる。また、本実施形態では、機能の異なる半導体装置を積層することにより、一つのシステムブロックを構築することも可能である。
図9は、上述した半導体装置1を搭載した電子機器の一例を示す図であって、携帯電話300を示す図である。小型化・薄型化及び高機能化が実現された本発明の電子部品を搭載したので、高品質で小型の携帯電話300が実現される。
また、半導体装置1が実装される電子機器としては、携帯電話の他にも、液晶表示装置や、有機エレクトロルミネッセンス表示装置、プラズマ型表示装置等の電気光学装置を備えた電子機器とすることもできる。
例えば、図10に示すように、上述した受動素子を有する電子部品51の接続パッド52、53がシリコン基板10のランド部48、49において接続されて表面実装される構成であってもよい。この構成においても、上述した実施形態と同様の作用・効果が得られる。
さらに、図1に示した受動素子を内蔵するシリコン基板10のランド部48、49に受動素子を有していない電子部品(半導体デバイス等)が表面実装される構成であってもよい。
さらにまた、本実施例では半導体素子が形成されたシリコン基板の例で説明してきたが、化合物半導体基板や、ポリシリコンなどの半導体が上に形成されたガラス基板、石英基板、有機半導体が上に形成された、有機基板などでもまったく同様の構造をとることができる。
Claims (12)
- 基板の一方の面に能動領域が設けられる半導体装置であって、
前記能動領域に半導体素子が設けられ、
前記基板の他方の面に受動素子が設けられ、
前記受動素子は、前記基板を貫通する貫通導電部を介して前記一方の面に設けられた電極と電気的に接続され、
前記基板の他方の面に、前記能動領域と前記受動素子と挟まれる位置に接地電極膜が設けられることを特徴とする半導体装置。 - 請求項1記載の半導体装置において、
前記基板の他方の面には、絶縁性材料で形成された応力緩和層が設けられ、
前記受動素子の少なくとも一部は、前記応力緩和層上に設けられることを特徴とする半導体装置。 - 請求項1または2記載の半導体装置において、
前記受動素子は、前記基板の他方の面側に配置される配線パターンを用いて形成もしくは、接続されることを特徴とする半導体装置。 - 請求項3記載の半導体装置において、
前記受動素子は、複数の層に積層された配線パターンを用いて形成もしくは、接続されることを特徴とする半導体装置。 - 請求項3または4記載の半導体装置において、
前記配線パターンの少なくとも一部は、外部接続用端子をなすことを特徴とする半導体装置。 - 請求項5記載の半導体装置において、
前記外部接続用端子に、電子部品が表面実装されていることを特徴とする半導体装置。 - 請求項5または6記載の半導体装置において、
前記基板が前記外部接続端子で互いに接続されて複数積層されることを特徴とする半導体装置。 - 請求項1から7のいずれかに記載の半導体装置において、
前記基板の他方の面に、少なくとも前記受動素子を保護する保護膜を有することを特徴とする半導体装置。 - 請求項1から8のいずれかに記載の半導体装置において、
前記基板の一方の面に第2の受動素子が設けられることを特徴とする半導体装置。 - 請求項9記載の半導体装置において、
前記第2の受動素子は、前記基板の一方の面側に配置される配線パターンを用いて形成もしくは、接続されることを特徴とする半導体装置。 - 請求項9記載の半導体装置において、
前記第2の受動素子は、前記基板の一方の面側に実装されるデバイスに設けられることを特徴とする半導体装置。 - 請求項1から11のいずれかに記載の半導体装置が実装されていることを特徴とする電子機器。
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CNA2006101011456A CN1893078A (zh) | 2005-07-06 | 2006-07-03 | 电子基板、电子基板的制造方法、及电子设备 |
TW095124319A TW200715708A (en) | 2005-07-06 | 2006-07-04 | Electronic substrate, manufacturing method for electronic substrate, and electronic device |
US12/782,076 US8416578B2 (en) | 2005-07-06 | 2010-05-18 | Manufacturing method for an electronic substrate |
US12/782,041 US8284566B2 (en) | 2005-07-06 | 2010-05-18 | Electronic substrate |
US13/787,225 US9087820B2 (en) | 2005-07-06 | 2013-03-06 | Electronic substrate |
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US8284566B2 (en) | 2012-10-09 |
US8416578B2 (en) | 2013-04-09 |
US9496202B2 (en) | 2016-11-15 |
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US20100226109A1 (en) | 2010-09-09 |
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US20150325499A1 (en) | 2015-11-12 |
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US9087820B2 (en) | 2015-07-21 |
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