Invention Grant
US07741701B2 Method for reducing stress concentrations on a semiconductor wafer by surface laser treatment
有权
通过表面激光处理减少半导体晶片上的应力集中的方法
- Patent Title: Method for reducing stress concentrations on a semiconductor wafer by surface laser treatment
- Patent Title (中): 通过表面激光处理减少半导体晶片上的应力集中的方法
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Application No.: US11374634Application Date: 2006-03-13
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Publication No.: US07741701B2Publication Date: 2010-06-22
- Inventor: Richard L. Mahle , Peter J. Sakakini
- Applicant: Richard L. Mahle , Peter J. Sakakini
- Applicant Address: US TX Dallas
- Assignee: Texas Instruments Incorporated
- Current Assignee: Texas Instruments Incorporated
- Current Assignee Address: US TX Dallas
- Agent Yingsheng Tung; Wade J. Brady, III; Frederick J. Telecky, Jr.
- Main IPC: H01L23/34
- IPC: H01L23/34 ; H01L21/301

Abstract:
A method for treating an area of a semiconductor wafer surface with a laser for reducing stress concentrations is disclosed. The wafer treatment method discloses treating an area of a wafer surface with a laser beam, wherein the treated area is ablated or melted by the beam and re-solidifies into a more planar profile, thereby reducing areas of stress concentration and stress risers that contribute to cracking and chipping during wafer singulation. Preferably, the treated area has a width less than that of a scribe street, but wider than the kerf created by a wafer dicing blade. Consequently, when the wafer is singulated, the dicing blade will preferably saw through treated areas only. It will be understood that the method of the preferred embodiments may be used to treat other areas of stress concentration and surface discontinuities on the wafer, as desired.
Public/Granted literature
- US20060172509A1 Method for reducing stress concentrations on a semiconductor wafer by surface laser treatment Public/Granted day:2006-08-03
Information query
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