PRODUCTION ENGINEERING MEASURE CR-(XM-53)/U QUARTZ CRYSTAL UNITS.
Quarterly rept. no. 5, Nov 65-Jan 66.
BLILEY ELECTRIC CO ERIE PA
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The work was devoted to the preliminary investigation of reliability. The goal of this program is to achieve a maximum failure rate of 1 per thousand hours with the 1000 pilot-run units, using a 6-month test at 85C to determine compliance. Frequency changes exceeding 4 x 10 to the minus 8th power per month andor resistance increases of more than 15 are considered as failures. Tests were conducted on sample CR-XM-53U units which had received no special processing or screening to improve reliability, other than the methods normally used on all precision crystal units. These tests indicate that the samples can meet or closely approach the requirements, but that losses because of holder failure, mostly cracking or leakage around the pins, keep both sealing yields and failure rates at unsatisfactory levels. Author
- Electrical and Electronic Equipment
- Manufacturing and Industrial Engineering and Control of Production Systems