PRODUCTION ENGINEERING MEASURES FOR HIGH RELIABILITY, FIXED, FILM, PRECISION RESISTORS.
Quarterly progress rept. no. 7, 1 Jul-30 Sep 64,
INTERNATIONAL RESISTANCE CO PHILADELPHIA PA
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A revised batch evaluation procedure was adopted. Accumulation of data during the seventh quarterly re port period has confirmed the effectiveness of the procedure for evaluating evaporated material before releasing it for manufacturing. An evaluation of lead assembly strength was made. Statistical information is presented to show that the lead strength exceeds more than four times the amount required for in-process tests. Inspection methods were improved by determining that greater accuracy and efficiency are obtained when a comparator is substituted for a graduated eye loupe. Correlation exists between the glass bead crack rate at sealing and the length of time for cleaning the lead prior to gold plating. The design of the binner is complete and has been sent out for quotation. The automatic spiraller is in the final design stage. Design of the sequential sealer has been started. Sample parts have been sent to a vendor who will propose a modified design of commercial capping equipment. Additional pulse adjustment tests were conducted on GEM resistors. The temperature coefficient of the part is not affected by pulsing but like the XLT, erratic behavior is observed during pulsing. A technique however, was developed for pulsing to .1 tolerance. Author