Kollmorgen Technologies Corporation

Advanced Interconnection Technology, Inc.

Marju L Friedrich

Andrew J Schoenberg

Ronald Morino

Raymond J Keogh

Jonathan C Crowell

Brian E Swiggett

John G Branigan

George Szenczy

Maurice E Fitzgibbon

George Czenczy

A non-tacky, solid, adhesive composition comprising: (a) at least one film forming polymeric resin of number average molecular weight (Mn) of at least about 10,000 and having a hydroxyl, epoxide or unsaturated functionality greater than about 7, the polymeric resin being selected from the group of polyols consisting of polyesters, polyurethanes, phenoxies, epoxies and mixtures thereof; a plasticizer present in an amount which permits the activation without C-staging of the polymeric resin; (b) a curing agent which is capable of crosslinking and curing the polymeric resin to a C-stage, the curing agent being present in an amount sufficient to C-stage the polymeric resin. The adhesive composition can be activated without C-staging the polymeric resin, upon application of sufficient heat or ultrasonic energy for a time period less than one second. The curing agent is non-reactive at the conditions which will activate the adhesive composition, but can be made reactive upon application of sufficient energy in the form of radiant energy or in the form of heat above the activation temperature, for a time period sufficient to cure the polymeric resin in the composition. The adhesive composition is capable of converting, in the C-stage, into an infusible composition which does not melt, flow or decompose when exposed for 10 seconds to molten solder at 260.degree. C. and does not soften when exposed to dichloroethane at 25.degree. C. for 10 seconds. The adhesive composition is suitable for forming a wire scribed circuit board and embedding a wire conductor on a surface of the circuit board.

Heat activatable adhesive for wire scribed circuits

This invention relates to interconnection circuit boards and processes for making and modifying interconnection circuit boards wherein adhesive is applied to a wire used in scribing a conductor pattern. The adhesive is activated to a tacky state during the wire scribing operation which forms the conductor pattern, and can thereafter be cured to permanently bond the conductors to the board surface.

Wire scribed circuit boards and method of manufacture

Method of making wires scribed circuit boards

A non-blocking, solid, adhesive composition comprising, (a) a film forming polymeric resin of average molecular weight between 10,000 and about 100,000 and having an epoxide, hydroxyl or unsaturated functionality greater than about 2, the polymeric resin being selected from the group consisting of polyesters, polyurethanes and epoxies; (b) at least one filler, or at least one polyfunctional compound of average molecular weight below about 7,000 and containing a polyaromatic backbone, or mixtures thereof, the weight ratio of (a) to (b) being between about 1.5:1 and about 9:1; and (c) a curing agent which is capable of cross-linking and curing the polymeric resin to a C-stage, the curing agent being present in an amount sufficient to C-stage the polymeric resin. The adhesive composition can be activated without becoming C-staged upon application of sufficient heat or ultrasonic energy for a time period less than one second. The curing agent is non-reactive at the conditions which will activate the adhesive composition, but can be made reactive upon application of sufficient energy in the form of radiant energy or in the form of heat at or above the activation temperature, for a time period sufficient to cure the composition. The adhesive composition is flexible, and in the C-stage, is capable of forming an infusible composition which does not melt, flow or decompose when exposed for 10 seconds to molten solder at 260.degree. C. and does not soften when exposed to dichloromethane at 25.degree. C. for one minute. The adhesive composition is suitable for bonding a wire to a surface, to another wire or to itself.

Growing community of inventors

Babylon, NY, United States of America

Marju L Friedrich