Hybrid microcircuit glass-to-metal seal repair process

Details Hybrid microcircuit glass-to-metal seal repair process Hybrid microcircuit glass-to-metal seal repair process

1995-06-07

1996-08-27

Bell, Janyce

Coating processes

Measuring, testing, or indicating

427 96, 427140, 427287, 427294, 4273855, 427387, 4273936, B05D 302, B32B 3500

Patent

active

055499252

ABSTRACT:
A process for repairing leaking glass-to-metal seals of a hybrid microcircuit header. The process comprises the following steps. A leaking hybrid microcircuit header is delidded (has its lid removed). The leaking hybrid microcircuit header, generally with its leads pointing vertically, is disposed on a vacuum source. A vacuum is formed on the hybrid microcircuit header using the vacuum source. A stream of helium is flowed over the seals to verify the presence of leaks in the seals of the hybrid microcircuit header. A small amount of high vacuum sealant is applied to each of the leaking glass-to-metal seals while the hybrid microcircuit header is exposed to the vacuum. The vacuum draws the sealant through the cracked or defective glass-to-metal seals. The high vacuum sealant generally comprises a silicone resin having a low vapor pressure. A stream of helium is caused to flow over the resealed leads following application of the high vacuum sealant to confirm that the hybrid microcircuit header is sealed. The hybrid microcircuit header is removed 27 from the vacuum source. The hybrid microcircuit header is then cured at a temperature of 150.+-.10 degrees Celsius for a minimum of 2 hours to complete the repair process 20. The lid is reattached (seam sealed) following repairs. A final leak test is performed after reattachment of the lid.

REFERENCES:
patent: 4681520 (1987-07-01), Birkhauser
patent: 4708889 (1987-11-01), Hammond et al.
patent: 5221388 (1993-06-01), Haubs et al.

Affiliated with

Also associated with

Rating

Hybrid microcircuit glass-to-metal seal repair process does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hybrid microcircuit glass-to-metal seal repair process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hybrid microcircuit glass-to-metal seal repair process will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1055042