Incoming material control assembly

Quality control systems and procedures are a requirement in almost every bonding application. Quality control should cover all phases of the bonding cycle from inspection of incoming material to the inspection of the completed assembly. In fact, good quality control will start even before receipt of materials. Quality control will encompass, at a minimum ... 

Since composite structures can be large and complex to cost-effectively replace metal assemblies, the labor input value of these structures can be considerable. The benefit of testing the incoming materials and of verifying the processing is obvious. Ideally, with feed-back control and complete control over the incoming materials, there would be reduced need for final product inspection. 

At the foundry level, quality control tests may be performed diuing incoming inspection of the ceramic materials. Finished-product inspection may range from limited testing (e.g., shorts and opens to ensure that the product was built to print) to additional functional performance testing on each substrate. Test coupons on each panel may be used for electrical performance checks (e.g., impedance, resistance), and destructive mechanical tests for feature size conformance. The extent of testing at this level is determined by the functional complexity of the circuits, final assembly testing, and economics. 

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