Defects, fault coverage, yield and cost, in board manufacturing

  • Authors:
  • Mick M. V. Tegethoff;Tom W. Chen

  • Affiliations:
  • Hewllett-Packard Company, Fort Collins, CO;Department of Electrical Engineering, Colorado State University, Fort Collins, CO

  • Venue:
  • ITC'94 Proceedings of the 1994 international conference on Test
  • Year:
  • 1994

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Abstract

An analysis of the main contributors to the quality and cost of complex board manufacturing is presented. Manufacturing data from three boards built at Hewlett-Packard and simulation models are used to derive the sensitivity of quality and cost versus Surface Mount Technology (SMT) solder defect rate, component functional defect rate and test coverage. A new Yield model which accounts for the clustering of solder defects is introduced and a first order estimation of the cost of implementing the IEEE 1149.1 standard on ASKS is given.