Matsushita Electric Works, Ltd.

Yasuo Tohrin

Kenji Ogasawara

Tokio Yoshimitsu

Keiko Kashihara

Yoshihisa Sugawa

Yoshinobu Marumoto

Tomoaki Iwami

Hideto Misawa

Motoyuki Akamatsu

Ken-ichi Shinotani

Joji Sakakibara

Kohei Kotera

Process of impregnating a layer substrate having openings which is substantially defined by opposing two main surfaces with a resin composition in the form of liquid, and the process is characterized in that one of the main surfaces and the resin composition are kept in such a contact condition that the substrate is located on the resin composition. A prepreg and a laminate are also provided which are produced by the use of the substrate which has been prepared by the above process.

Process of impregnating substrate and impregnated substrate

A resin-impregnated base of which total quantity of resin absence regions is restricted to be below a predetermined value, whereby a metal-foil coated laminate of the resin-impregnated bases is made obtainable continuously through a hot-compression molding under a low pressure, while restraining in particular void generation to maintain the dimensional change rate of the laminate to be minimum.

Resin-impregnated base and method of manufacturing same

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Yokkaichi, Japan

Yasuo Tohrin