Invention Grant
- Patent Title: Method to remove residue of metal etch
- Patent Title (中): 去除金属蚀刻残留物的方法
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Application No.: US590024Application Date: 1996-02-02
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Publication No.: US5641382APublication Date: 1997-06-24
- Inventor: Tsu Shih , Chih-Chien Hung , Yuan-Chang Huang
- Applicant: Tsu Shih , Chih-Chien Hung , Yuan-Chang Huang
- Applicant Address: TWX Hsin-Chu
- Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
- Current Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
- Current Assignee Address: TWX Hsin-Chu
- Main IPC: H01L21/3213
- IPC: H01L21/3213 ; H01L21/00
Abstract:
This invention provides a method for removing metal etch residue of silicon nodules, resulting from a small percentage of silicon in the metal, without causing overetch damage to the photoresist pattern, the metal electrode pattern, or to dielectric layers. The metal conductor layer is partially etched leaving from 20 to 80 percent of the original thickness. Any residue of silicon nodules formed during this partial etching is then removed using ion bombardment. The remainder of the metal conductor layer is then etched. A short overetch period is used to remove any remaining residue of silicon nodules. The overetch period is short and there is no deterioration of the photoresist or exposed edges of the electrode pattern.
Public/Granted literature
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Information query
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