JP6968557B2 - 液体吐出ヘッド用基板、半導体基板、およびそれらの製造方法 - Google Patents
液体吐出ヘッド用基板、半導体基板、およびそれらの製造方法 Download PDFInfo
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- JP6968557B2 JP6968557B2 JP2017054760A JP2017054760A JP6968557B2 JP 6968557 B2 JP6968557 B2 JP 6968557B2 JP 2017054760 A JP2017054760 A JP 2017054760A JP 2017054760 A JP2017054760 A JP 2017054760A JP 6968557 B2 JP6968557 B2 JP 6968557B2
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- conductor layer
- layer
- gold
- opening region
- substrate
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Description
図1は、本実施形態の液体吐出ヘッド用基板の一例であるインクジェット記録ヘッド用基板20を示す図である。図1(a)は、インクジェット記録ヘッド用基板20の斜視図の例を示す。図1(b)は、図1(a)のIB−IB線断面を示す図である。
実施形態1で説明した工程を実施する前工程として、導電体層2の表面をテストプローブでコンタクトさせて半導体集積回路の半導体素子特性のテスト(電気特性検査)が行われる場合がある。実施形態で説明した図1(b)は電気特性検査を行わずにバンプ形成を行った場合の模式図である。本実施形態では、電気特性検査が行われる場合の形態を説明する。
実施形態1においては、導電体層2の開口領域の開口面積が、保護層3のスルーホール領域(開口領域)の開口面積よりも小さい領域となるに形成されている形態を説明した。
4 バンプ下地金属膜
5 金
8 パッド開口部
11 外部接続部
Claims (12)
- 外部からの液体吐出用の駆動電力を受ける電極パッドと、
前記駆動電力により液体吐出用のエネルギーを発生する吐出エネルギー発生素子と、を含み、
前記電極パッドが少なくとも前記吐出エネルギー発生素子と電気的に接続される導電体層と金の層とによって構成される液体吐出ヘッド用基板であって、
前記導電体層の一部に開口領域が形成され、前記開口領域を含む前記導電体層の積層方向の上層部分に前記導電体層を保護する保護層と前記金の層が形成されており、前記導電体層の前記開口領域に対応する前記金の層の上部に、前記外部と接続される外部接続部が備えられており、
前記開口領域の開口面積は、前記保護層のスルーホールの開口面積と等しく、前記導電体層と前記金の層とは前記導電体層の側面で接触していることを特徴とする、液体吐出ヘッド用基板。 - 前記金の層は、1.0μm以下の厚さで形成されている、請求項1に記載の液体吐出ヘッド用基板。
- 前記外部接続部は、前記導電体層の開口領域に対応する前記金の層の上部にボンディングされている、請求項1または2に記載の液体吐出ヘッド用基板。
- 前記開口領域の開口面積は、前記外部接続部が備えられている領域の面積よりも大きい、請求項1から3のいずれか一項に記載の液体吐出ヘッド用基板。
- 前記開口領域は、前記外部接続部が備えられている領域の中心部分の積層方向の下層部分に形成されている、請求項1から4のいずれか一項に記載の液体吐出ヘッド用基板。
- 前記開口領域は、前記導電体層のプローブ痕部を含む領域に形成されている、請求項1から5のいずれか一項に記載の液体吐出ヘッド用基板。
- 前記導電体層の開口断面角度は30°<Θ<90°である、請求項1から6のいずれか一項に記載の液体吐出ヘッド用基板。
- 外部からの電力を受ける電極パッドを含み、前記電極パッドが少なくとも導電体層と金の層とによって構成される半導体基板であって、
前記導電体層の一部に開口領域が形成され、前記開口領域を含む前記導電体層の積層方向の上層部分に前記導電体層を保護する保護層と前記金の層が形成されており、前記導電体層の前記開口領域に対応する前記金の層の上部に、前記外部と接続される外部接続部が備えられており、
前記開口領域の開口面積は、前記保護層のスルーホールの開口面積と等しく、前記導電体層と前記金の層とは前記導電体層の側面で接触していることを特徴とする、半導体基板。 - 外部からの液体吐出用の駆動電力を受ける電極パッドと、
前記駆動電力により液体吐出用のエネルギーを発生する吐出エネルギー発生素子と、
を含み、
前記電極パッドが少なくとも前記吐出エネルギー発生素子と電気的に接続される導電体層と金の層とによって構成される液体吐出ヘッド用基板の製造方法であって、
前記導電体層の一部に開口領域を形成する工程と、
前記開口領域を含む前記導電体層の積層方向の上層部分に前記導電体層を保護する保護層と前記金の層を形成する工程と、
前記導電体層の前記開口領域に対応する前記金の層の上部に、前記外部と接続される外部接続部をボンディングする工程と、
を含み、
前記開口領域の開口面積は、前記保護層のスルーホールの開口面積と等しく、前記導電体層と前記金の層とは前記導電体層の側面で接触していることを特徴とする、液体吐出ヘッド用基板の製造方法。 - 前記導電体層の一部に開口領域を形成する工程の前に、前記吐出エネルギー発生素子と前記導電体層とを半導体基板に形成する工程をさらに含む、請求項9に記載の液体吐出ヘッド用基板の製造方法。
- 前記半導体基板に形成された前記導電体層にプローブをコンタクトする電気特性検査を行う工程をさらに含み、
前記開口領域は、前記プローブのプローブ痕部を含む前記導電体層の一部に形成される、請求項10に記載の液体吐出ヘッド用基板の製造方法。 - 外部からの電力を受ける電極パッドを含み、前記電極パッドが少なくとも導電体層と金の層とによって構成される半導体基板の製造方法であって、
前記導電体層の一部に開口領域を形成する工程と、
前記開口領域を含む前記導電体層の積層方向の上層部分に前記導電体層を保護する保護層と前記金の層を形成する工程と、
前記導電体層の前記開口領域に対応する前記金の層の上部に、前記外部と接続される外部接続部をボンディングする工程と、
を含み、
前記開口領域の開口面積は、前記保護層のスルーホールの開口面積と等しく、前記導電体層と前記金の層とは前記導電体層の側面で接触していることを特徴とする半導体基板の製造方法。
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Application Number | Priority Date | Filing Date | Title |
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JP2017054760A JP6968557B2 (ja) | 2017-03-21 | 2017-03-21 | 液体吐出ヘッド用基板、半導体基板、およびそれらの製造方法 |
US15/912,858 US10438912B2 (en) | 2017-03-21 | 2018-03-06 | Liquid ejection head substrate and semiconductor substrate |
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