Invention Grant
- Patent Title: Systems and methods for automatically verifying correct die removal from film frames
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Application No.: US14896311Application Date: 2014-06-06
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Publication No.: US09934565B2Publication Date: 2018-04-03
- Inventor: Ajharali Amanullah , Tim Hing Lai , Jing Lin , Lian Seng Ng , Soon Guan Tan
- Applicant: ASTI HOLDINGS LIMITED
- Applicant Address: SG Singapore
- Assignee: Asti Holdings Limited
- Current Assignee: Asti Holdings Limited
- Current Assignee Address: SG Singapore
- Agency: The Webb Law Firm
- International Application: PCT/SG2014/000262 WO 20140606
- International Announcement: WO2014/209226 WO 20141231
- Main IPC: H04N9/47
- IPC: H04N9/47 ; H04N17/00 ; H04N7/18 ; G06T7/00 ; H01L21/67 ; G06K9/46 ; G06T11/60 ; H04N5/225 ; G06T7/33 ; G06T7/73 ; G06T7/13 ; H04N17/02

Abstract:
A skeleton wafer inspection system includes an expansion table displaceable relative to a camera configured for capturing segmental images of a skeleton wafer on a film frame. During segmental image capture, illumination is directed to the top and/or bottom of the film frame. Segmental images are digitally stitched together to produce a composite image, which can be processed to identify die presence or absence therein at active area die positions having counterpart die positions in a process wafer map. A composite image of a diced wafer on a film frame can also be generated, and used as a navigation aid or guide during die sort operations, or to verify whether a die sort apparatus has correctly detected a reference die prior to die sort operations. A composite image of a skeleton wafer can similarly be generated for use as a navigation aid or guide for film frame repopulation operations.
Public/Granted literature
- US20160125583A1 SYSTEMS AND METHODS FOR AUTOMATICALLY VERIFYING CORRECT DIE REMOVAL FROM FILM FRAMES Public/Granted day:2016-05-05
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