Invention Grant
- Patent Title: Die separation using adhesive-layer laser scribing
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Application No.: US15825079Application Date: 2017-11-28
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Publication No.: US10607861B2Publication Date: 2020-03-31
- Inventor: Siriluck Wongratanaporngoorn , Yao Jung Chang , Ekapong Tangpattanasaeree , Paradee Jitrungruang , Pitak Seantumpol
- Applicant: NXP B.V.
- Applicant Address: NL Eindhoven
- Assignee: NXP B.V.
- Current Assignee: NXP B.V.
- Current Assignee Address: NL Eindhoven
- Main IPC: H01L21/56
- IPC: H01L21/56 ; H01L21/768 ; H01L21/683 ; H01L21/67 ; H01L21/78 ; B23K26/00

Abstract:
A method for wafer dicing and removing separated integrated circuit (IC) dies from a carrier substrate includes mounting a wafer on a substrate using an adhesive layer, laser scribing the adhesive layer to create defect regions in the adhesive layer, and performing a breaking step to separate the laser-scribed adhesive layer into separated adhesive portions corresponding to the IC dies. For a stealth-dicing (SD) technique, defect regions also are created in the wafer using a laser and the breaking step is an expansion step that simultaneously separates the dies and corresponding portions of adhesive. For a dice-before-grind (DBG) technique, the dies are separated by backside grinding before the breaking step. Efficient adhesive-layer separation is achieved with reduced backside chipping associated with conventional blade dicing.
Public/Granted literature
- US20190164784A1 DIE SEPARATION USING ADHESIVE-LAYER LASER SCRIBING Public/Granted day:2019-05-30
Information query
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