Accession Number : AD0633688

Title :   PRODUCTION ENGINEERING MEASURE FOR TYPE CR-(XM-60)/U CRYSTAL UNITS.

Descriptive Note : Quarterly rept. no. 6, Oct-Dec 65,

Corporate Author : BULOVA WATCH CO INC WOODSIDE N Y ELECTRONICS DIV

Personal Author(s) : Lagasse,G. A.

Report Date : DEC 1965

Pagination or Media Count : 24

Abstract : The new Kold-Weld holders were utilized in a 20 unit crystal group now under test. Evaluations will be made at the end of the test. Thermo-compression bonding had been abandoned early in the program in favor of ultrasonic welding. Efforts, however, will be resumed if ultrasonic welding does not prove practical. The re-evaluation of the reliability data uncovered some serious questions concerning the drive levels of the units under test. The CR-(XM-60)/U units to be manufactured are expected to have much lower resistance values than the present CR-47A/U units, because of process improvements including primarily, the evacuation of the Kold-Weld holders. Under these conditions, the drive levels may very well be in excess of five times the specification, a factor contributing to an increased aging rate, and perhaps, a poorer reliability rate than that of the CR-47A/U units. (Author)

Descriptors :   (*QUARTZ RESONATORS, MANUFACTURING), (*CRYSTAL HOLDERS, QUARTZ RESONATORS), RELIABILITY(ELECTRONICS), BONDING, ULTRASONIC WELDING, LOW FREQUENCY, PERFORMANCE(ENGINEERING), MEDIUM FREQUENCY, AGING(MATERIALS)

Subject Categories : Electrical and Electronic Equipment
      Mfg & Industrial Eng & Control of Product Sys

Distribution Statement : APPROVED FOR PUBLIC RELEASE