JP7228568B2 - 自己整合高アスペクト比構造及びその作製方法 - Google Patents
自己整合高アスペクト比構造及びその作製方法 Download PDFInfo
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- JP7228568B2 JP7228568B2 JP2020507606A JP2020507606A JP7228568B2 JP 7228568 B2 JP7228568 B2 JP 7228568B2 JP 2020507606 A JP2020507606 A JP 2020507606A JP 2020507606 A JP2020507606 A JP 2020507606A JP 7228568 B2 JP7228568 B2 JP 7228568B2
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- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
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- H01L21/76838—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the conductors
- H01L21/76841—Barrier, adhesion or liner layers
- H01L21/76853—Barrier, adhesion or liner layers characterized by particular after-treatment steps
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Description
Claims (15)
- 超高アスペクト比構造を形成する方法であって、
構造化された基板の特徴内に金属膜を堆積させることであって、前記構造化された基板が、前記基板の表面からある深さだけ前記基板の中に延在する複数の特徴を備える、金属膜を堆積させること、
前記特徴から真っすぐに延在する金属酸化物の柱を形成するために、前記金属膜を体積膨張させること、
第2の膜の上端が前記柱の上端と略等しくなるように、前記柱の間に前記第2の膜を堆積させること、
前記柱の前記上端が前記第2の膜の前記上端の下方となるように、前記柱の一部分を除去すること、
所定の高さの高アスペクト比特徴を成長させるために、金属膜を堆積させること、前記金属膜を体積膨張させること、前記第2の膜を堆積させること、ならびに任意選択的に前記柱の一部分を除去することを、繰り返すこと、及び
前記特徴から前記柱の全てを除去することを含む、方法。 - 前記金属膜を堆積させることが、前記金属膜の過積層を形成することを含み、前記方法が、前記金属膜を体積膨張させる前に、前記金属膜の前記過積層を除去することを更に含む、請求項1に記載の方法。
- 前記過積層を除去することが、化学機械平坦化を含む、請求項2に記載の方法。
- 前記金属膜を膨張させることが、前記金属膜を酸化させること又は窒化させることのうちの1以上を含む、請求項1に記載の方法。
- 前記柱の間に前記第2の膜を堆積させることが、前記第2の膜の過積層を形成することを含み、前記方法が、前記第2の膜の前記過積層を除去することを更に含む、請求項1に記載の方法。
- 前記過積層を除去することが、化学機械平坦化を含む、請求項5に記載の方法。
- 前記柱の部分を除去することが、前記柱をエッチングすることを含む、請求項1に記載の方法。
- 前記柱をエッチングすることが、前記柱を金属ハロゲン化物化合物に曝露することを含む、請求項7に記載の方法。
- 前記金属ハロゲン化物化合物が、前記柱とは異なる金属を有する、請求項8に記載の方法。
- 前記柱の全てを除去することが、前記柱を金属ハロゲン化物のエッチャントに曝露することを含む、請求項1に記載の方法。
- 前記金属膜が、タングステンを含む、請求項1に記載の方法。
- 前記金属酸化物の柱が、酸化タングステンを含む、請求項11に記載の方法。
- 前記柱の一部分を除去することが、前記酸化タングステンをハロゲン化タングステンのエッチャントに曝露することを含む、請求項12に記載の方法。
- 前記柱の全てを除去することが、前記酸化タングステンをハロゲン化タングステンのエッチャントに曝露することを含む、請求項13に記載の方法。
- 超高アスペクト比構造を形成する方法であって、
(a)構造化された基板の特徴内にタングステン膜を堆積させることであって、前記構造化された基板が、前記基板の表面からある深さだけ前記基板の中に延在する複数の特徴を備え、前記タングステン膜が、タングステンの過積層を形成する、タングステン膜を堆積させること、
(b)前記タングステンの過積層をCMPによって除去すること、
(c)前記特徴から真っすぐに延在する酸化タングステンの柱を形成するために、前記タングステン膜を体積膨張させること、
(d)第2の膜の過積層が形成されるように、前記酸化タングステンの柱の間に前記第2の膜を堆積させること、
(e)前記第2の膜の過積層をCMPによって除去すること、
(f)所定の高さの高アスペクト比特徴を成長させるために、任意選択的に、前記柱の上端が前記第2の膜の上端の下方となるように前記酸化タングステンの柱の一部分を除去し、(a)から(e)を繰り返すこと、及び
(g)前記特徴から前記柱の全てを除去することを含む、方法。
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US10622221B2 (en) | 2017-12-14 | 2020-04-14 | Applied Materials, Inc. | Methods of etching metal oxides with less etch residue |
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