Mitsui Minings & Melting Co., Ltd.

Masahiko Nakano

Takuya Yamamoto

Seiji Nagatani

Yasuhide Yamaguchi

Kenji Suzuoka

To reduce warping of a copper clad laminate coated with copper foils of different thicknesses on both sides, and thereby to improve production efficiency of the printed-wiring boards, there is provided a copper clad laminate coated with copper foils of different thicknesses on both sides, wherein a first copper foil on one side of the laminate is not recrystallizable by hot pressing for production of said laminate and a second foil on the other side is recrystallizable by the hot pressing and thicker than the first foil.

Copper clad laminate

A zinc oxide fine particle-adhered composite material consists essentially of a substrate and zinc oxide fine particles adhered thereto. The composite material is characterized in that the zinc oxide fine particles deposited, from an aqueous medium, on the surface of the substrate are firmly adhered to the surface without using any binder and the zinc oxide fine particles are substantially exposed on the surface. The composite material is prepared by, for instance, a method which comprises the step of coming an aqueous suspension of zinc oxide fine particle in contact with a substrate to thus deposit the zinc oxide fine particles on the surface of the substrate. The composite material allows for the zinc oxide particles to sufficiently show their antibacterial, deodorizing, UV absorbing, photocatalytic, stain-proofing and purifying activities without any delay.

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Ageo, Japan

Masahiko Nakano