JP2016219446A - 半導体装置および半導体装置の製造方法 - Google Patents
半導体装置および半導体装置の製造方法 Download PDFInfo
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- JP2016219446A JP2016219446A JP2015098744A JP2015098744A JP2016219446A JP 2016219446 A JP2016219446 A JP 2016219446A JP 2015098744 A JP2015098744 A JP 2015098744A JP 2015098744 A JP2015098744 A JP 2015098744A JP 2016219446 A JP2016219446 A JP 2016219446A
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- H01L21/823412—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type with a particular manufacturing method of the channel structures, e.g. channel implants, halo or pocket implants, or channel materials
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Abstract
【解決手段】本発明の第1の態様においては、第1導電型の不純物を有する第1半導体層と、第1半導体層のおもて面側に設けられたトレンチ部と、トレンチ部の内壁に設けられ、第1半導体層よりも低濃度の第1導電型の不純物を有する第2半導体層とを備える半導体装置を提供する。
【選択図】図2
Description
[先行技術文献]
[特許文献]
[特許文献1] 特開2005−32792号公報
[特許文献2] 特開昭59−69943号公報
[特許文献3] 特開2007−329385号公報
[特許文献4] 特開平5−55262号公報
[特許文献5] 特開平1−246844号公報
Claims (10)
- 第1導電型の不純物を有する第1半導体層と、
前記第1半導体層のおもて面側に設けられたトレンチ部と、
前記トレンチ部の内壁に設けられ、前記第1半導体層よりも低濃度の第1導電型の不純物を有する第2半導体層と
を備える半導体装置。 - 前記第1半導体層の不純物濃度は、4E14cm−3以上7E16cm−3以下であり、
前記第2半導体層の不純物濃度は、3.2E14cm−3以上4.5E16cm−3以下である
請求項1に記載の半導体装置。 - 前記第2半導体層の厚みは、前記トレンチ部の幅の27.3%以上36.4%以下である
請求項1または2に記載の半導体装置。 - 前記第2半導体層は、前記第1半導体層のおもて面の端部まで設けられている、請求項1から3のいずれか一項に記載の半導体装置。
- 前記端部の領域における前記第2半導体層に設けられた酸化物領域をさらに備える、
請求項4に記載の半導体装置。 - 前記第2半導体層は、
低濃度不純物領域と、
前記低濃度不純物領域よりも前記トレンチ部に近い領域に形成され、前記低濃度不純物領域よりも不純物濃度が高い高濃度不純物領域と
を有する、請求項5に記載の半導体装置。 - 前記トレンチ部の内部において前記第2半導体層に接して設けられたトレンチ絶縁膜と、
前記トレンチ部の内部において前記トレンチ絶縁膜に接して設けられたトレンチ電極と
をさらに備える、
請求項1から6のいずれか一項に記載の半導体装置。 - 第1導電型の不純物を有する第1半導体層を形成する段階と、
前記第1半導体層のおもて面側にトレンチ部を形成する段階と、
前記トレンチ部の内壁に、前記第1半導体層よりも低濃度の第1導電型の不純物を有する第2半導体層を形成する段階と
を備える半導体装置の製造方法。 - 前記第2半導体層を形成する段階の後に、前記第2半導体層の端部の領域に酸化物領域を形成する段階
をさらに備える、請求項8に記載の半導体装置の製造方法。 - 前記第2半導体層を形成する段階の後であって、前記酸化物領域を形成する段階の前に、前記第2半導体層のおもて面側に第1絶縁膜を形成する段階と、
前記第1絶縁膜を形成する段階の後に、前記第1絶縁膜のおもて面側に前記第1絶縁膜に対してエッチング選択性を有する第2絶縁膜を形成する段階と
をさらに備え、
前記酸化物領域を形成する段階において、前記第2絶縁膜を形成する段階の後に、前記端部の領域における前記第2絶縁膜を部分的に除去して、前記第2絶縁膜が部分的に除去された領域に前記酸化物領域を形成する
請求項9に記載の半導体装置の製造方法。
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