Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1992-08-27
1994-05-24
Ryan, Patrick J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428901, 361750, B32B 900
Patent
active
053147405
ABSTRACT:
A base board for a printed circuit board panel which permits easy inspection of a printed circuit by means of a fluorescence-applied circuit pattern inspection machine used for the inspection of printed circuit patterns and which is not altered in the properties as a printed circuit board, the base board having an insulating layer containing 5.0 to 0.00001% by weight of a compound of any one of the formulae (1), (2) and (3), ##STR1##
REFERENCES:
patent: 4774188 (1988-09-01), Chandross
patent: 4965208 (1990-10-01), Blitchington
patent: 5160787 (1992-11-01), Gaku
Coombs, "Printed Circuit Handbook", 1988, p. 31.9.
Allen "Photopolymerisation & Photoimaging Science & Technology", Elsevier Science Pub., 1989 pp. 1-40.
Ishii Kenji
Kondo Yoshinori
Matsumoto Hiroyuki
Sayama Norio
Jewik Patrick
Mitsubishi Gas Chemical Company Inc.
Ryan Patrick J.
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