Inspection of multipattern circuit boards

Chemistry: analytical and immunological testing – Process or composition for determination of physical state... – Surface area – porosity – imperfection – or alteration

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250362, 2504591, 428418, 428901, G01N 2164, B32B 1508, B32B 2738

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active

049652087

ABSTRACT:
Circuit boards with advantageous properties are produced through the addition of a fluorescent dye. The presence of the dye allows an expeditious inspection of the metallic pattern on the circuit board by induced fluorescence. If the circuit board is two-sided, to maintain the effectiveness of the dye, a material such as a light scattering composition is added to the circuit board substrate.

REFERENCES:
patent: 4152723 (1979-05-01), McMahon et al.
patent: 4774188 (1988-09-01), Chandross
H. Lee and K. Neville, Handbook of Epoxy Resins, McGraw-Hill, New York (1967), Chapter 11, p. 11.
A. N. Chianciarulo and R. L. Webb in Proceedings of the 23rd Annual Technical Conference, Reinforced Plastics/Composites Division, the Society of the Plastic Industry, Incorporated, 1968, Section 5B, pp. 1-6.

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