Hitachi Chemical Company, Ltd.

Hitachi Chemical, Ltd.

Yasushi Goto

Isao Tsukagoshi

Yutaka Yamaguchi

Atsuo Nakajima

Tomohisa Ohta

An adhesive film comprising (a) a liquid epoxy resin, (b) a solid resin having one or more functional groups, (c) a microcapsule type curing agent, and if necessary (d) a coupling agent, is effective for connecting semiconductor chips and wiring boards under heat and pressure.

Process for connecting circuits and adhesive film used therefor

An isotropically electroconductive resin film material produced by sticking electroconductive particles to a sticking layer formed on a support and fixing therein, and filling a film-forming resin incompatible with the sticking material among the electroconductive particles, has electroconductivity only in the film thickness direction via the electroconductive particles uniformly dispersed in the plane direction, and is suitable for electrically connecting oppositely placed circuits and fine electrodes of a plurality of electronic parts, and for testing electronic parts.

Anisotropically electroconductive resin film

Circuit connections can be repaired with high accuracy and high reliability by peeling a mutually connected circuit portion to be repaired and placing a porous sheet with predetermined shape on the peeled circuit surface, impregnating the porous sheet with a peeling solution, removing the porous sheet containing unnecessary adhesive dissolved by the peeling solution, while cleaning the circuit surface contacted with the peeling solution, and reconnecting the cleaned circuit surface to a circuit surface to be connected via an adhesive.

Process for repairing circuit connections

A composition comprising (A) an epoxy resin type adhesive, (B) particles obtained by coating a nucleus of a curing agent with a film, (C) pressure-deformable electroconductive particles having an average particle size larger than that of the particles (B), and if necessary (D) rigid particles having an average particle size smaller than that of the particles (B). Also, a method of using for the composition connecting circuits electrically or connecting a semiconductor chip to a wiring substrate.

Method of using an anisotropically electroconductive adhesive having

A composition comprising (A) an epoxy resin type adhesive, (B) particles obtained by coating a nucleus of a curing agent with a film, (C) pressure-deformable electroconductive particles having an average particles size larger than that of the particles (B), and if necessary (D) rigid particles having an average particle size smaller than that of the particles (B), is effective for connecting circuits electrically or connecting a semiconductor chip to a wiring substrate.

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Shimodate, Japan

Yasushi Goto