QUANTIFICATION OF ELECTRONIC CIRCUIT CONNECTION TECHNIQUES
HUGHES AIRCRAFT CO FULLERTON CA
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The study was directed toward gathering reliability data on several presently used electronic circuit connection types. Laboratory and field reliability reports were gathered from known producers and users of electronic equipment. In all, data for 350 billions of connection operating hours were collected during the six month study. The data covered 6 types of connections solder, resistance welding, wire wrap, crimp, ultrasonic welding, and thermal compression bonding. Failure rates and confidence intervals were calculated and compared for each of the first four connection types. Mathematical analyses were performed on the data collected in an attempt to measure the effects of environmental stresses on connection failure rates. A merit index was developed so that designers may select optimum types of connections for use in various applications. The details of factor and subfactor selection and their quantification are described. Application weights for several classes of Air Force ground equipments are developed and presented.
- Electrical and Electronic Equipment