Invention Grant
- Patent Title: Method to remove circuit patterns from a wafer
- Patent Title (中): 从晶片去除电路图案的方法
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Application No.: US11609573Application Date: 2006-12-12
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Publication No.: US07666689B2Publication Date: 2010-02-23
- Inventor: Steven R. Codding , David Domina , James L. Hardy , Timothy Krywanczyk
- Applicant: Steven R. Codding , David Domina , James L. Hardy , Timothy Krywanczyk
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Gibb I.P. Law Firm, LLC
- Agent Richard M. Kotulak, Esq.
- Main IPC: H01L21/00
- IPC: H01L21/00

Abstract:
A method holds wafers that contain patterned structures using a particle blasting tool. Next, the method directs particles at the patterned structures, such that the particles contact the patterned structures with a predetermined velocity and remove the patterned structures. This process of directing the particles at the wafer is controlled to stop directing the particles when substantially all of the patterned structures are removed from the wafer. This process also comprises selecting the particles to have a size equal to or less than 3 microns. For example, the particles can comprise aluminum oxide, silicon oxide, cerium, and/or a plastic. By maintaining the particle size equal to 3 microns or less, the blasting produces a substantially smooth wafer surface, thereby omitting the need for subsequent wafer polishing. Further, the wafers produced by such processing do not exhibit the highly stress lattice and fragile nature of wafers processed by wet processing.
Public/Granted literature
- US20080139088A1 Method to Remove Circuit Patterns from a Wafer Public/Granted day:2008-06-12
Information query
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