Photoresist polymers plates printing

Manufacture of Printed Wiring Boards. Printed wiring boards, or printed circuit boards, are usually thin flat panels than contain one or multiple layers of thin copper patterns that interconnect the various electronic components (e.g. integrated circuit chips, connectors, resistors) that are attached to the boards. These panels are present in almost every consumer electronic product and automobile sold today. The various photopolymer products used to manufacture the printed wiring boards include film resists, electroless plating resists (23), liquid resists, electrodeposited resists (24), solder masks (25), laser exposed photoresists (26), flexible photoimageable permanent coatings (27) and polyimide interlayer insulator films (28). Another new use of photopolymer chemistry is the selective formation of conductive patterns in polymers (29). 

The production of modem printing plates involves photopolymerization or photo-crossiinking of light sensitive polymers called photoresists to solubilize or insolubize the exposed area, depending on the kinds of resists used, followed by development and etching. The fast drying of wet ink films can be accomplished by exposure to u.v. or electron beams which photochemically initiated rapid photopolymerization of the wet ink to solid patterns... 

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