Invention Grant
US08522426B2 Vent blocking on vented ball grid arrays to provide a cleaner solution barrier
有权
通风堵塞排气球栅阵列,提供更清洁的溶液屏障
- Patent Title: Vent blocking on vented ball grid arrays to provide a cleaner solution barrier
- Patent Title (中): 通风堵塞排气球栅阵列,提供更清洁的溶液屏障
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Application No.: US12794735Application Date: 2010-06-05
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Publication No.: US08522426B2Publication Date: 2013-09-03
- Inventor: Robert H. Dennis , Amanda Loehr , Robert E. Morris , Peter D. Patalano , Aaron J. Stein , John Stephens , Harold L. Wieck , Eli Holzman
- Applicant: Robert H. Dennis , Amanda Loehr , Robert E. Morris , Peter D. Patalano , Aaron J. Stein , John Stephens , Harold L. Wieck , Eli Holzman
- Applicant Address: US MA Waltham
- Assignee: Raytheon Company
- Current Assignee: Raytheon Company
- Current Assignee Address: US MA Waltham
- Agent Eric A. Gifford
- Main IPC: H05K3/34
- IPC: H05K3/34 ; H05K3/20 ; H05K3/30 ; H05K3/00 ; H01R9/00 ; H01K3/10 ; B29C65/00 ; B32B37/00 ; G05G15/00

Abstract:
A vented BGA package is reconfigured by first applying a continuous bead of adhesive around the perimeter of the package to seal the gap between the lid and substrate. The continuous bead defines a channel through the pressure relief vents to a polarity through-hole in the lid. The BGA package is reflow soldered to a PWB at an elevated temperature using solder flux, clean or no-clean. The IC die achieves elevated temperature pressure relief through the pressure relief vents along the channel and out the polarity through-hole. After reflow a seal is applied to plug the polarity through-hole. The PWB is washed in an aqueous cleaner solution to remove flux residue. The continuous bead of adhesive and the seal form a cleaner solution barrier that prevents the solution from contacting conductors inside the package. The seal may be removed or left intact depending on the operating environment.
Public/Granted literature
- US20110296680A1 VENT BLOCKING ON VENTED BALL GRID ARRAYS TO PROVIDE A CLEANER SOLUTION BARRIER Public/Granted day:2011-12-08
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