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Learning method and apparatus for detecting and controlling solder defects

  • US 5,621,811 A
  • Filed: 02/04/1994
  • Issued: 04/15/1997
  • Est. Priority Date: 10/30/1987
  • Status: Expired due to Term
First Claim
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1. A method of determining the quality of an electrical connection comprising the steps of:

  • acquiring a cross sectional image of a cutting plane of an electrical connection on a first circuit board;

    defining a region of interest proximate the electrical connection on the first circuit board;

    measuring a characteristic of the region of interest on said first circuit board and storing said measured characteristic;

    acquiring a cross sectional image of a cutting plane of an electrical connection on a second circuit board; and

    calculating a correction factor for said cross sectional image of a cutting plane of said electrical connection on said second circuit board which is a function of said measured characteristic.

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