JP7179916B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP7179916B2 JP7179916B2 JP2021099214A JP2021099214A JP7179916B2 JP 7179916 B2 JP7179916 B2 JP 7179916B2 JP 2021099214 A JP2021099214 A JP 2021099214A JP 2021099214 A JP2021099214 A JP 2021099214A JP 7179916 B2 JP7179916 B2 JP 7179916B2
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- film
- conductive film
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- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Electrodes Of Semiconductors (AREA)
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Description
図6Aは、本発明の第1の実施形態に係る半導体装置1の構成を示す平面図であり、図6Bは、図6Aにおいて破線で囲む領域Bの拡大図である。半導体装置1は、保護膜40の開口部41の形状が、比較例に係る半導体装置1Xと異なり、それ以外の構成は、比較例に係る半導体装置1Xと同様である。すなわち、半導体装置1は、一例としてパワーMOSFETを構成するものであり、その断面構造は、図1Bに示される比較例に係る半導体装置1Xと同様である。また、半導体装置1において、保護膜40を形成する方法は、比較例に係る半導体装置1Xと同様であり、ポリイミド膜40aの表面にレジスト膜50を形成し、レジスト膜50を部分的に露光する工程(図2A参照)、レジスト膜50を現像し、ポリイミド膜40aをハーフエッチングする工程(図2B参照)、ポリイミド膜40aをジャストエッチングする工程(図2C参照)、ポリイミド膜40aをオーバーエッチングする工程(図2D参照)、レジスト膜50を除去し、ポリイミド膜40aを熱硬化する工程(図2E参照)を含む。なお、図6Aおよび図6Bにおいて、導電膜30の図示が省略されているが、導電膜30は、ゲート20を覆うように半導体基板10の表面に形成されている。また、導電膜30の表面に形成される凹部31は、互いに隣接するゲート20同士の間に対応する位置に形成され、ゲート20の伸びる方向と平行な方向に伸びている。また、図6Aおよび図6Bにおいて、保護膜40については、開口部41の外縁である開口端41Eのみが示されているが、保護膜40は、比較例に係る半導体装置1Xと同様、開口部41において導電膜30を部分的に露出させるように導電膜30の表面を覆っている。
図7Aは、本発明の第2の実施形態に係る半導体装置1Aの構成を示す平面図であり、図7Bは、図7Aにおいて破線で囲む領域Cの拡大図である。半導体装置1Aは、保護膜40の開口部41の形状が、比較例に係る半導体装置1Xおよび第1の実施形態に係る半導体装置1と異なり、それ以外の構成は、比較例に係る半導体装置1Xおよび第1の実施形態に係る半導体装置1と同様である。また、半導体装置1Aにおいて、保護膜40を形成する方法は、上記した比較例に係る半導体装置1Xおよび第1の実施形態に係る半導体装置1と同様である。なお、図7Aおよび図7Bにおいて、導電膜30の図示が省略されているが、導電膜30は、ゲート20を覆うように半導体基板10の表面に形成されている。また、導電膜30の表面に形成される凹部31は、互いに隣接するゲート20同士の間に対応する位置に形成され、ゲート20の伸びる方向と平行な方向に伸びている。また、図7Aおよび図7Bにおいて、保護膜40については、開口部41の外縁である開口端41Eのみが示されているが、保護膜40は、比較例に係る半導体装置1Xと同様、開口部41において導電膜30を部分的に露出させるように導電膜30の表面を覆っている。
図8Aは、本発明の第3の実施形態に係る半導体装置1Bの構成を示す平面図であり、図8Bは、図8Aにおいて破線で囲む領域Dの拡大図である。半導体装置1Bは、保護膜40の開口部41の形状が、比較例に係る半導体装置1Xおよび第1の実施形態に係る半導体装置1と異なり、それ以外の構成は、比較例に係る半導体装置1Xおよび第1の実施形態に係る半導体装置1と同様である。また、半導体装置1Bにおいて、保護膜40を形成する方法は、上記した比較例に係る半導体装置1Xおよび第1の実施形態に係る半導体装置1と同様である。なお、図8Aおよび図8Bにおいて、導電膜30の図示が省略されているが、導電膜30は、ゲート20を覆うように半導体基板10の表面に形成されている。また、導電膜30の凹部31は、互いに隣接するゲート20同士の間に対応する位置に形成され、ゲート20の伸びる方向と平行な方向に伸びている。また、図8Aおよび図8Bにおいて、保護膜40については、開口部41の外縁である開口端41Eのみが示されているが、保護膜40は、比較例に係る半導体装置1Xと同様、開口部41において導電膜30を部分的に露出させるように導電膜30の表面を覆っている。
図10Aは、本発明の第4の実施形態に係る半導体装置1Cの構成を示す平面図であり、図10Bは、図10Aにおいて破線で囲む領域Eの拡大図である。半導体装置1Cは、保護膜40の開口部41の形状が、比較例に係る半導体装置1Xおよび第1の実施形態に係る半導体装置1と異なり、それ以外の構成は、比較例に係る半導体装置1Xおよび第1の実施形態に係る半導体装置1と同様である。また、半導体装置1Cにおいて、保護膜40を形成する方法は、上記した比較例に係る半導体装置1Xおよび第1の実施形態に係る半導体装置1と同様である。なお、図10Aおよび図10Bにおいて、導電膜30の図示が省略されているが、導電膜30は、ゲート20を覆うように半導体基板10の表面に形成されている。また、導電膜30の凹部31は、互いに隣接するゲート20同士の間に対応する位置に形成され、ゲート20の伸びる方向と平行な方向に伸びている。また、図10Aおよび図10Bにおいて、保護膜40については、開口部41の外縁である開口端41Eのみが示されているが、保護膜40は、比較例に係る半導体装置1Xと同様、開口部41において導電膜30を部分的に露出させるように導電膜30の表面を覆っている。
10 半導体基板
11 基板層
12 エピタキシャル層
20 ゲート
30 導電膜
31 凹部
40 保護膜
41 開口部
41E 開口端
42 残渣
Claims (3)
- 半導体基板と、
前記半導体基板の表面を覆い、互いに平行に配置された直線状の複数の凹部を表面に有する導電膜と、
前記導電膜の表面を覆い、前記複数の凹部が配置する第1方向に互いに離隔した第1及び第2の端部を含む少なくとも4つの端部を有し且つ前記導電膜を部分的に露出させる開口部を有する保護膜と、
を含み、
上面視において前記開口部の前記端部により形成された各辺が前記複数の凹部に対して交差しており、
前記開口部の形状は、前記複数の凹部に対して0°よりも大であり且つ90°よりも小である角度をなす互いに対向する2辺と、前記複数の凹部に対して垂直な互いに対向するまたは0°よりも大であり且つ90°よりも小である角度をなす他の2辺と、を有する四角形である
半導体装置。 - 半導体基板と、
前記半導体基板の表面を覆い、互いに平行に配置された直線状の複数の凹部を表面に有する導電膜と、
前記導電膜の表面を覆い、前記複数の凹部が配置する第1方向に互いに離隔した第1及び第2の端部を含む少なくとも4つの端部を有し且つ前記導電膜を部分的に露出させる開口部を有する保護膜と、
を含み、
上面視において前記開口部の前記端部により形成された各辺が前記複数の凹部に対して交差しており、
前記開口部の端部は、前記第1方向に互いに離隔し前記第1方向に交差する第2方向において前記第1及び第2の端部とそれぞれ対向する第3及び第4の端部を含み、
前記第1及び前記第3の端部により形成された辺と、前記第2及び前記第4の端部により形成された辺の少なくとも一方は、前記複数の凹部の少なくとも1つと繰り返し交差するように蛇行しつつ前記複数の凹部に沿った辺を含み、
前記開口部の蛇行した辺は、前記複数の凹部に対して0°よりも大であり且つ90°よりも小である角度をなす複数の辺からなるジグザグパターンを有する
半導体装置。 - 半導体基板と、
前記半導体基板の表面を覆い、互いに平行に配置された直線状の複数の凹部を表面に有する導電膜と、
前記導電膜の表面を覆い、前記複数の凹部が配置する第1方向に互いに離隔した第1及び第2の端部と、前記第1方向に互いに離隔し前記第1方向に交差する第2方向において前記第1及び第2の端部とそれぞれ対向する第3及び第4の端部とを含む少なくとも4つの端部を有し且つ前記導電膜を部分的に露出させる開口部を有する保護膜と、
を含み、
前記第1及び前記第3の端部により形成された辺と、前記第2及び前記第4の端部により形成された辺の少なくとも一方は、前記複数の凹部の少なくとも1つと繰り返し交差するように蛇行しつつ前記複数の凹部に沿った辺を含む半導体装置。
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