Invention Grant
- Patent Title: Manufacturing method of semiconductor device
- Patent Title (中): 半导体器件的制造方法
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Application No.: US12408375Application Date: 2009-03-20
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Publication No.: US08399356B2Publication Date: 2013-03-19
- Inventor: Naoya Sakamoto , Takahiro Sato , Yoshiaki Oikawa , Rai Sato , Yamato Aihara , Takayuki Cho , Masami Jintyou
- Applicant: Naoya Sakamoto , Takahiro Sato , Yoshiaki Oikawa , Rai Sato , Yamato Aihara , Takayuki Cho , Masami Jintyou
- Applicant Address: JP
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP
- Agency: Husch Blackwell LLP
- Priority: JP2008-085288 20080328
- Main IPC: H01L21/306
- IPC: H01L21/306

Abstract:
A conductive film containing aluminum or an aluminum alloy with a thickness equal to or greater than 1 μm and equal to or less than 10 μm is etched by wet-etching to be a predetermined thickness, and then etched by dry-etching, whereby side-etching of the conductive film can be suppressed and thickness reduction of a mask can be suppressed. The suppression of side-etching of the conductive film and the suppression of thickness reduction of the mask enable a conductive film containing aluminum or an aluminum alloy even with a large thickness equal to or greater than 1 μm and equal to or less than 10 μm to be etched such that the gradient of the edge portion of the conductive film can be steep, a predetermined thickness of the conductive film can be obtained, and shape difference from a mask pattern can be suppressed.
Public/Granted literature
- US20090305503A1 Manufacturing Method of Semiconductor Device Public/Granted day:2009-12-10
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