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Coupon (PWB) A coupon or test coupon is a printed circuit board (PCB) used to test the quality of a printed wiring board (PWB) fabrication process. Test coupons are fabricated on the same panel as the PWBs, typically at the edges. Coupons are then inspected to ensure proper layer alignment, electrical connectivity, and cross sectioned to ...
By Siddarth S. (Reuters) -Top Wall Street brokerages, whose investment banking units helped Reddit prepare for its public issue, started coverage of the social media company with doubts over its ...
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