B - Operations – Transporting – 05 – D
Patent
B - Operations, Transporting
05
D
117/116
B05D 1/28 (2006.01) B05D 1/36 (2006.01) G03F 7/16 (2006.01) H05K 3/00 (2006.01)
Patent
CA 2026794
ABSTRACT OF THE DISCLOSURE Planar substrate surfaces used in the fabrication of printed circuit boards are provided with a substantially uniform and defect-free coating of liquid photoresist by roller coating in a process in which a first coating roller is used to provide a first layer of liquid photoresist on the substrate surface in less than the ultimately desired thickness, and the thus-treated substrate, without any change in planar orientation, is then provided with additional photoresist, to the ultimately desired thickness, using a distinct (i.e., separate) second coating roller.
Kukanskis Peter E.
Macdermid Incorporated
Perley-Robertson Hill & Mcdougall Llp
LandOfFree
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