Method for forming a polycyanurate encapsulant

Details Method for forming a polycyanurate encapsulant Method for forming a polycyanurate encapsulant

1991-01-31

1992-08-11

Hearn, Brian E.

Fishing, trapping, and vermin destroying

437225, 437207, 437213, H01L 2156

Patent

active

051378469

ABSTRACT:
An improved encapsulant for an electronic component package is composed of an inorganic powder dispersed in a polycyanurate resin binder. The encapsulant is formed by applying a curing mixture of the powder and a liquid vehicle composed predominantly of a blend of one or more multifunctional cyanate ester compounds that are curable to form the binder. The blend includes a cyanate ester substituted bisphenol derivative compound having the formula ##STR1## wherein R.sub.1 and R.sub.2 are members of the group consisting of hydrogen, methyl and ethyl. Preferably, the blend includes a second cyantophenylene compound having the formula ##STR2## wherein R.sub.3 is a hydrocarbon chain including an aryl link.

REFERENCES:
patent: 4709008 (1987-11-01), Shimp
patent: 4999699 (1991-03-01), Christie et al.
Shimp, D. A. et al., "New Liquid Dicyanate Monomer for Rapid Impregnation of Reinforcing Fibers" presented at 34th International SAMPE Symposium, Reno, May 8-11, 1989.
Shimp, D. A. et al., "New Cyanate Ester Rsin With Low Temperature (125.degree.-200.degree. C.) Cure Capability" presented at 35th International SAMPE Symposium and Exhibition, Apr. 2-5, 1990, Anaheim, California.

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