JP2009177079A - 固体撮像装置、固体撮像装置の実装方法、固体撮像装置の製造方法、および電子情報機器 - Google Patents
固体撮像装置、固体撮像装置の実装方法、固体撮像装置の製造方法、および電子情報機器 Download PDFInfo
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Abstract
【解決手段】封止パッケージ1内にて撮像素子チップ2を、そのマイクロレンズ8上に中空空間を設けて封止してなる固体撮像装置100において、封止パッケージ1の内面、撮像素子チップ2の表面およびボンディングワイヤの表面を保護膜4で完全に覆うようにした。
【選択図】図1
Description
図1および図2は、本発明の実施形態1による固体撮像装置の構造を説明する図であり、図1(a)は、該固体撮像装置の断面構造を示し、図1(b)は、マイクロレンズおよびその上の保護膜を拡大して示している。
(実施形態2)
図9は本発明の実施形態2による固体撮像装置の構造を説明する図であり、図9(a)は、該固体撮像装置の断面構造を示し、図9(b)は、マイクロレンズおよびその上の保護膜を拡大して示している。
(実施形態3)
図10は本発明の実施形態3による固体撮像装置の構造を説明する図であり、図10(a)は、該固体撮像装置の断面構造を示し、図10(b)は、マイクロレンズおよびその上の保護膜を拡大して示している。
(実施形態4)
なお、上記実施形態1〜3では、特に説明しなかったが、上記実施形態1〜3の固体撮像装置の少なくともいずれかを撮像部に用いた例えばデジタルビデオカメラ、デジタルスチルカメラなどのデジタルカメラや、画像入力カメラ、スキャナ、ファクシミリ、カメラ付き携帯電話装置などの画像入力デバイスを有した電子情報機器について説明する。本発明の電子情報機器は、本発明の上記実施形態1〜3の固体撮像装置の少なくともいずれかを撮像部に用いて得た高品位な画像データを記録用に所定の信号処理した後にデータ記録する記録メディアなどのメモリ部と、この画像データを表示用に所定の信号処理した後に液晶表示画面などの表示画面上に表示する液晶表示装置などの表示手段と、この画像データを通信用に所定の信号処理をした後に通信処理する送受信装置などの通信手段と、この画像データを印刷(印字)して出力(プリントアウト)する画像出力手段とのうちの少なくともいずれかを有している。
1a パッケージ基板
1b 外壁部
2 撮像素子チップ(固体撮像素子)
3 ボンディングワイヤ
4、4a〜4f 保護膜
5a 接着材
5b ガラスシール
6 リッドガラス
7 外部リード端子
8 マイクロレンズ
100、100a、100b 固体撮像装置
120 保護膜形成用治具
130 CVD装置
Claims (22)
- 外部リード端子を有する絶縁基板と、該絶縁基板に固着され、マイクロレンズを有する固体撮像素子と、該絶縁基板上方に配置され、該絶縁基板に固着された該固体撮像素子を封止する透明ガラス部材とを備え、該固体撮像素子の電極と該絶縁基板の外部リード端子とをワイヤーにより接続した固体撮像装置であって、
該透明ガラス部材は、該固体撮像素子のマイクロレンズと該透明ガラス部材との間に中空の空間が形成されるよう配置されており、
該絶縁基板、該固体撮像素子、および該ワイヤーの、該中空の空間内に露出する部分が、全て保護膜で覆われている固体撮像装置。 - 請求項1に記載の固体撮像装置において、
前記保護膜の屈折率は、前記マイクロレンズの構成材料の屈折率より小さく、かつ空気の屈折率より大きい固体撮像装置。 - 請求項2に記載の固体撮像装置において、
前記保護膜は、SiO2膜、SiON膜、およびSiN膜のうちのいずれかである固体撮像装置。 - 請求項2に記載の固体撮像装置において、
前記保護膜は、屈折率の異なる複数の透明絶縁膜を、表面側ほど屈折率の小さいものが位置するよう積層してなる多層構造を有している固体撮像装置。 - 請求項4に記載の固体撮像装置において、
前記保護膜は、屈折率の異なる2つの透明絶縁膜を、表面側ほど屈折率の小さいものが位置するよう積層してなる2層構造を有し、
該保護膜を構成する外側の透明絶縁膜はSiO2膜であり、該保護膜を構成する内側の透明絶縁膜はSiN膜である固体撮像装置。 - 請求項4に記載の固体撮像装置において、
前記保護膜は、屈折率の異なる2つの透明絶縁膜を、表面側ほど屈折率の小さいものが位置するよう積層してなる2層構造を有し、
該保護膜の外側の透明絶縁膜はSiON膜であり、該保護膜の内側の透明絶縁膜はSiN膜である固体撮像装置。 - 請求項4に記載の固体撮像装置において、
前記保護膜は、屈折率の異なる2つの透明絶縁膜を、表面側ほど屈折率の小さいものが位置するよう積層してなる2層構造を有し、
該保護膜の外側の透明絶縁膜はSiO2膜であり、該保護膜の内側の透明絶縁膜はSiON膜である固体撮像装置。 - 請求項4に記載の固体撮像装置において、
前記保護膜は、屈折率の異なる3つの透明絶縁膜を、表面側ほど屈折率の小さいものが位置するよう積層してなる3層構造を有し、
該保護膜の外側の透明絶縁膜はSiO2膜であり、該保護膜の内側の透明絶縁膜はSiN膜であり、該保護膜の中間の透明絶縁膜はSiON膜である固体撮像装置。 - 請求項2に記載の固体撮像装置において、
前記保護膜は、その屈折率をその表面側ほど小さくなるよう連続的に変化させたものである固体撮像装置。 - 請求項9に記載の固体撮像装置において、
前記保護膜には、SiON膜として、その酸素と窒素との比率を、その屈折率がその表面側ほど小さくなるよう連続的に変化させたものを用いている固体撮像装置。 - 請求項3ないし10のいずれかに記載の固体撮像装置において、
前記保護膜は、プラズマCVD法により形成したものである固体撮像装置。 - 外部リード端子を有する絶縁基板上に、マイクロレンズを有する固体撮像素子を実装する固体撮像装置の実装方法であって、
該絶縁基板上に該固体撮像素子を固着するステップと、
該絶縁基板の外部リード端子と該固体撮像素子の電極とをワイヤーにより接続するステップと、
該絶縁基板の表面に保護膜を、該絶縁基板、該固体撮像素子、および該ワイヤーの露出する部分が全て該保護膜で覆われるよう形成するステップと、
該絶縁基板上に透明ガラス部材を配置して、該固体撮像素子のマイクロレンズと該透明ガラス部材との間に中空の空間が形成されるよう該固体撮像素子を封止するステップとを含む固体撮像装置の実装方法。 - 請求項12に記載の固体撮像装置の実装方法において、
前記保護膜は、前記透明ガラス部材による固体撮像素子の封止前にプラズマCVD処理により形成する固体撮像装置の実装方法。 - 請求項13に記載の固体撮像装置の実装方法において、
前記保護膜の形成ステップでは、少なくとも前記固体撮像素子をその側面及び底面を全て覆う治具に収めてCVD処理を行う固体撮像装置の実装方法。 - 請求項14に記載の固体撮像装置の実装方法において、
前記CVD処理は、前記ワイヤーの表面側に形成される保護膜の膜厚と、該ワイヤーの裏面側に形成される保護膜の膜厚との差分が小さくなるよう、前記素子収納用治具の傾きを変えて、少なくとも2回に分けて行う固体撮像装置の実装方法。 - 請求項13に記載の固体撮像装置の実装方法において、
前記プラズマCVD処理では、反応ガスとして、テトラエチルオルトシリケートまたはエチルエトキシシランと、O2とを用いて、前記保護膜としてSiO2膜を形成する固体撮像装置の実装方法。 - 請求項13に記載の固体撮像装置の実装方法において、
前記プラズマCVD処理では、反応ガスとして、SiH4とNH3とN2とを用いて、前記保護膜としてSiN膜を形成する固体撮像装置の実装方法。 - 請求項13に記載の固体撮像装置の実装方法において、
前記プラズマCVD処理では、反応ガスとして、SiH4とN2OとHeとを用いて、前記保護膜としてSiON膜を形成する固体撮像装置の実装方法。 - 請求項13に記載の固体撮像装置の実装方法において、
前記保護膜の形成ステップでは、該保護膜が屈折率の異なる複数の透明絶縁膜からなる多層構造となるよう、前記CVD処理を、その反応ガスの成分を変更して複数回行う固体撮像装置の実装方法。 - 請求項13に記載の固体撮像装置の実装方法において、
前記保護膜の形成ステップでは、該保護膜として、その屈折率が連続的に変化した透明絶縁膜が形成されるよう、前記CVD処理を、その反応ガスの成分を連続的に変化させて行う固体撮像装置の実装方法。 - 外部リード端子を有する絶縁基板上に、マイクロレンズを有する固体撮像素子を実装し、該絶縁基板に固着された該固体撮像素子が封止されるよう透明ガラス部材を該絶縁基板上に配置してなる固体撮像装置を製造する方法であって、
該絶縁基板上に該固体撮像素子を固着するステップと、
該絶縁基板の外部リード端子と該固体撮像素子の電極とをワイヤーにより接続するステップと、
該絶縁基板の表面に保護膜を、該絶縁基板、該固体撮像素子、および該ワイヤーの露出する部分が全て該保護膜で覆われるよう形成するステップと、
該絶縁基板上に透明ガラス部材を配置して、該固体撮像素子のマイクロレンズと該透明ガラス部材との間に中空の空間が形成されるよう該固体撮像素子を封止するステップとを含む固体撮像装置の製造方法。 - 被写体の撮像を行う撮像部を備えた電子情報機器であって、
該撮像部は、請求項1ないし請求項12のいずれかに記載の固体撮像装置である電子情報機器。
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