Invention Grant
- Patent Title: Method of fine pitch bump stripping
- Patent Title (中): 细间距凸块剥离方法
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Application No.: US11465375Application Date: 2006-08-17
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Publication No.: US07781140B2Publication Date: 2010-08-24
- Inventor: Chih-Min Tseng , Hsiu-Mei Yu , Wen-Hsiang Tseng , Chia-Jen Cheng , Yu-Lung Feng , Tung-Wen Hsieh
- Applicant: Chih-Min Tseng , Hsiu-Mei Yu , Wen-Hsiang Tseng , Chia-Jen Cheng , Yu-Lung Feng , Tung-Wen Hsieh
- Applicant Address: TW Hsin-Chu
- Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
- Current Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
- Current Assignee Address: TW Hsin-Chu
- Agency: Duane Morris LLP
- Main IPC: G03F7/42
- IPC: G03F7/42 ; B08B3/08 ; B08B3/10

Abstract:
A method for removing dry film resist (DFR) from a fine pitch solder bump array on a semiconductor wafer provides for pre-soaking the wafer in a chemical bath then turbulently exposing the wafer to a chemical solution, both steps taking place in batch processing with the wafers processed in a vertical position. The wafers are then individually processed through a chemical spinning operation in which a chemical solution is dispensed from a spray nozzle while motion such as spinning is imparted the horizontally disposed wafer. The spin speed of the chemical spraying process may then be increased to accelerate physical removal of residue. Deionized water rinsing and spin-drying provide a solder bump array void of any DFR or other residuals.
Public/Granted literature
- US20080044756A1 METHOD OF FINE PITCH BUMP STRIPPING Public/Granted day:2008-02-21
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