Radiation curable temporary solder mask

Details Radiation curable temporary solder mask Radiation curable temporary solder mask

1987-06-15

1989-05-02

Morgenstern, Norman

Coating processes

Electrical product produced

Welding electrode

427 96, 427259, 427264, 522 96, 522 99, 522103, 522182, 430256, 430260, B05D 306, B05D 136, B05D 500, G03C 190

Patent

active

048267058

ABSTRACT:
A composition and method for providing temporary masking of electrical and electronic components compatible with a high speed production operation. The composition is a radiation curable viscous liquid composition which provides minimal adhesion properties and substantial cohesive properties so that when cured, it can be readily removed in the manner of an adhesive tape. In particular, the radiation curable composition is characterized by cured properties a) of positive adhesion to the substrate to which the composition is applied, but insufficient adhesion to resist peeling forces applied by hand; and b) of sufficient cohesive strength to allow substantially all of the cured composition to be stripped mechanically or by hand in a single piece. Suitably the adhesion of the cured composition (22) to the substrate (16) as measured in the tensile shear mode, is between about 5 and 55 psi. This level of adhesion is sufficient to prevent ingress of solvent solder, plating or coating materials but low enough to allow easy dry stripping mechanically or by hand.

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CHR Industries, Inc./an Armco Company, temp-r-tape for printed circuit protection, undated pp. 1 and 2.
Chemtronics, Chemask.TM. Peelable Solder Mask, 1984, pp. 1 and 2.
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Chemtronics, Chemask.TM.S, Solvent Soluble Masking Agent, 1985, p. 1.

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