Sumitomo Bakelite Company Limited

Nec Corporation

Sumitomo Bakelite Corporation Limited

Toshio Komiyatani

Takashi Hirano

Hitoshi Kawaguchi

Satoru Katsurayama

Hiroshi Obata

Masayoshi Kondo

Tomoe Yamashiro

Masao Uesaka

Kenzou Maejima

Masataka Arai

Eiji Maehata

The present invention provides an adhesive tape comprising a flux-active compound having a carboxyl group and/or a phenolic hydroxyl group, a thermosetting resin and a film-forming resin. In the adhesive tape of the present invention, the thermosetting resin may be an epoxy resin and may contain a curing agent. The curing agent may be an imidazole compound and/or a phosphorous compound. The adhesive tape of the present invention can be used as an interlayer material for a circuit board and a multilayered flexible printed circuit board.

Adhesive film

This is to provide a conductive paste with higher electroconductivity containing, as raw materials: a metallic powder; a thermosetting resin; and a flux-activating compound having a carboxyl group and a phenolic hydroxyl group, which is applicable to the fine pitch-utilization.

Conductive paste

According to the present invention, there is provided a process for manufacturing a circuit board wherein a first substrate having a conductor post and a second substrate having a conductor pad for receiving the conductor post are laminated through an interlayer adhesive, and the conductor post and the conductor pad are electrically connected, comprising, as a first step, bonding the conductor pad with the conductor post by thermocompression under predetermined first conditions while the first and the second substrates are arranged such that the conductor pad faces the conductor post through the interlayer adhesive; thermocompressing the first substrate and the second substrate under predetermined second conditions while the conductor pad is bonded with the conductor post; and thermocompressing the first substrate and the second substrate under predetermined third conditions while the conductor pad is bonded with the conductor post, wherein the first, the second and the third conditions are different from each other.

Process for manufacturing circuit board

Interlaminar insulating adhesive for multilayer printed circuit board

An adhesive for a printed circuit board which consists essentially of a dispersion of a resin which is soluble in an alkaline oxidizing agent after curing in a resin matrix which is sparingly soluble in an alkaline oxidizing agent after curing, and a process for producing a printed circuit board using the above adhesive.

Adhesive for printed circuit board

Growing community of inventors

Akita, Japan

Toshio Komiyatani