Invention Grant
- Patent Title: Cooling heatshield for clamshell BGA rework
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Application No.: US17202552Application Date: 2021-03-16
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Publication No.: US11791239B2Publication Date: 2023-10-17
- Inventor: Sue Yun Teng
- Applicant: Google LLC
- Applicant Address: US CA Mountain View
- Assignee: Google LLC
- Current Assignee: Google LLC
- Current Assignee Address: US CA Mountain View
- Agency: Lerner David LLP
- Main IPC: H01L23/467
- IPC: H01L23/467 ; H01L23/498

Abstract:
The present disclosure provides for a heatshield that can be actively cooled during a rework process. The heatshield may include a backer plate, a metal plate, and/or a package pedestal. The backer plate may include one or more air inlet ports configured to be connected to an air compressor. Air inlet ducts may extend from the air inlet ports through at least a portion of the backer plate. A plurality of vents may extend from the air inlet ducts to a top surface of the backer plate such that the plurality of vents directs cooling gas forced into the heatshield towards the metal plate and a first BGA. The cooling gas may maintain the solder joint temperature of the first BGA package below the reflow temperature and below the solidus temperature of the solder joints to prevent reflow-related solder joint defects from occurring in the first BGA package during rework of a second BGA package.
Public/Granted literature
- US20220301977A1 Cooling Heatshield for Clamshell BGA Rework Public/Granted day:2022-09-22
Information query
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