JP2016062976A - 半導体装置およびその製造方法 - Google Patents
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Abstract
Description
図1(a)は、第1実施形態に係る半導体装置の要部であって、図1(b)のA−A’線における断面を表す模式的断面図であり、図1(b)は、図1(a)のB−B’線における切断面を上面視した模式的平面図である。
図2(a)〜図5(b)は、第1実施形態に係る半導体装置の製造過程を表し、図1(b)のA−A’線における断面に対応した模式的断面図である。
図6(a)〜図6(b)は、第2実施形態に係る半導体装置の製造過程を表し、図1(b)のA−A’線における断面に対応した模式的断面図である。
図8(a)〜図8(b)は、第3実施形態に係る半導体装置の製造過程を表し、図1(b)のA−A’線における断面に対応した模式的断面図である。
図9は、第4実施形態に係る半導体装置の要部を表す模式的断面図である。
Claims (12)
- 半導体領域と、
前記半導体領域の上に設けられた第1電極と、
前記半導体領域の上に設けられ、前記第1電極に並び、前記第1電極の材料と同じ材料を含む第2電極と、
前記半導体領域の上に設けられ、前記第1電極および前記第2電極の間に設けられた第3電極と、
前記半導体領域と前記第3電極との間に設けられた第1絶縁膜と、
前記第3電極に接続され、前記第1電極および前記第2電極の材料と同じ材料を含む第4電極と、
を備えた半導体装置。 - 前記第1電極、前記第2電極、および前記第4電極は、チタン、アルミニウム、および窒素を含む請求項1に記載の半導体装置。
- 前記第3電極は、チタン、モリブデン、タングステン、および窒素の少なくともいずれかを含む請求項1または2に記載の半導体装置。
- 前記第1絶縁膜の上、および前記第3電極の一部の上に、第2絶縁膜をさらに備えた請求項1〜3のいずれか1つに記載の半導体装置。
- 前記第2絶縁膜の一部の上に、バリア膜をさらに備え、
前記第2絶縁膜の一部の上に、前記バリア膜を介して、前記第1電極、前記第2電極、および第4電極のそれぞれの一部が設けられている請求項4に記載の半導体装置。 - 前記第4電極が前記第3電極に接続された部分は、前記第1電極から前記第2電極に向かう方向において、前記第3電極の中心部から前記第2電極の側にずれている請求項1〜5のいずれか1つに記載の半導体装置。
- 半導体領域の上に第1絶縁膜を介して第3電極を選択的に形成する工程と、
前記第1絶縁膜の上、および前記第3電極の上に、第2絶縁膜を形成する工程と、
前記第2絶縁膜から前記第3電極を露出させる第1開口と、前記第1絶縁膜および前記第2絶縁膜から前記半導体領域を露出させる第2開口および第3開口であり前記第1開口を挟む前記第2開口と前記第3開口と、を形成する工程と、
前記第1開口の中、前記第2開口の中、前記第3開口の中、および前記第2絶縁膜の上に電極層を形成する工程と、
前記電極層を分離し、前記第2開口を経由して前記半導体領域に接続された第1電極と、前記第3開口を経由して前記半導体領域に接続された第2電極と、前記第1開口を経由して前記第3電極に接続された第4電極と、を形成する工程と、
を備えた半導体装置の製造方法。 - 前記電極層を形成する工程において、チタン、アルミニウム、および窒素を含む前記電極層を形成する請求項7に記載の半導体装置の製造方法。
- 前記電極層を形成する工程は、
チタン膜、アルミニウム膜、チタン膜、および窒化チタン膜の順に積層された積層膜を形成する工程と、
前記積層膜を加熱する工程と、
を有する請求項7または8に記載の半導体装置の製造方法。 - 前記第3電極を選択的に形成する工程において、チタン、モリブデン、タングステン、および窒素の少なくともいずれかを含む前記第3電極を形成する請求項7〜9のいずれか1つに記載の半導体装置の製造方法。
- 前記第2絶縁膜を形成した後に、前記第2絶縁膜の上に、バリア膜を形成する請求項7〜10のいずれか1つに記載の半導体装置の製造方法。
- 前記第1開口、前記第2開口、および前記第3開口を形成する工程において、
前記第1開口は、前記第2開口から前記第3開口に向かう方向において、前記第3電極の中心部から前記第3開口の側にずれている請求項7〜11のいずれか1つに記載の半導体装置の製造方法。
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CN201510555672.3A CN105428409A (zh) | 2014-09-16 | 2015-09-02 | 半导体装置及其制造方法 |
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