Hitachi Chemical Company, Ltd.

Hirokazu Suzuki

Katsuyuki Masuda

Masaki Takeuchi

Kenichi Tomioka

Kazuhito Obata

Yoshitsugu Matsuura

Masahiko Suzuki

Sumio Yoshida

A process for production of a flexible laminated sheet having one or more laminated bodies each provided with a metal foil formed on one side of a resin film, the process comprising a coating step in which a varnish containing a polyamic acid and a solvent is coated onto the metal foil to form a coated film, a holding step in which the coated film formed on the metal foil is held, a drying step in which at least a portion of the solvent in the varnish is removed to form a layer composed of a resin composition, and a resin film-forming step in which the layer composed of the resin composition is heated to form a resin film containing a polyimide resin. The conditions for each step from the coating step up to the resin film-forming step are adjusted based on a target for the content of metal elements in the resin film.

Flexible laminate board, process for manufacturing of the board, and flexible print wiring board

Growing community of inventors

Chikusei, Japan

Hirokazu Suzuki