Nitto-denko Corporation

Ryouji Suezaki

Yasushi Tamura

Tetsuya Ohsawa

Hiroyuki Tanabe

Hitoki Kanagawa

Hirofumi Fujii

Katsutoshi Hirashima

A suspension board with circuit includes a metal supporting board, an insulating base layer formed on the metal supporting board, a conductive pattern formed on the insulating base layer, an insulating cover layer formed on the insulating base layer so as to cover the conductive pattern, and an insertion portion to be inserted into an E-block. A thickness of the insulating cover layer in the insertion portion is larger than a thickness of the insulating cover layer in a portion other than the insertion portion.

Suspension board with circuit and producing method thereof

A negative photosensitive material is provided which has a lower linear expansion coefficient and a lower hygroscopic expansion coefficient and is excellent in gradational patternability and PI etchability in patterning. The negative photosensitive material comprises:  wherein R, R, R, Rand R, which may be the same or different, are each a Cto Calkyl group, and Ar is an aryl group having a nitro group at its ortho position, wherein R, R, Rand R, which may be the same or different, are each a Cto Calkyl group, and Ar is an aryl group having a nitro group at its ortho position.

Negative photosensitive material, photosensitive board employing the negative photosensitive material, and negative pattern forming method

Suspension board with circuit and production method thereof

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Osaka, Japan

Ryouji Suezaki