Mitsui Minings & Melting Co., Ltd.

Joe Nishikawa

Tetsuhiro Matsunaga

Hajime Watanabe

Yoshinori Matsuura

Tetsuro Sato

Hiroaki Kurihara

There is provided a surface-treated copper foil including a surface coating layer provided on at least one surface of a copper foil, the surface coating layer being mainly composed of silicon with a hydrogen content of 1 to 35 atomic % and/or a carbon content of 1 to 15 atomic %. This foil can be manufactured by forming a surface coating layer composed mainly of silicon with the above hydrogen and carbon contents on at least one surface of the copper foil by PVD or CVD. The present invention can provide a copper foil with a surface coating layer that can achieve a high bonding strength to a resin layer even if the copper foil has an extremely smooth surface such as one formed by vapor deposition, for example, sputtering and also has a desirable insulation resistance suitable for achieving a fine pitch in a printed wiring board.

Surface-treated copper foil, method for producing same, copper-clad laminate for printed wiring board, and printed wiring board

A composite metal foil is provided comprising a porous metal foil comprising a two-dimensional network structure composed of a metal fiber, and a primer provided on at least a part of the interior and/or periphery of pores of the porous metal foil. According to the present invention, it is possible to obtain a composite metal foil which has a desired function imparted by a primer in addition to superior properties derived from a porous metal foil, in a highly productive and cost effective manner that is suited for continuous production.

Composite metal foil and production method therefor

A reinforced porous metal foil is provided including a porous portion comprising a two-dimensional network structure composed of a metal fiber and a reinforced portion which is substantially non-porous or less porous than the porous portion. The reinforced portion is composed of the same metal the metal fiber and is continuous and integral with the porous portion. Accordingly, it possible to provide a porous metal foil having superior properties at a low cost in a highly productive manner that is also suitable for continuous production.

Reinforced porous metal foil and process for production thereof

The porous metal foil of the present invention include a two-dimensional network structure composed of a metal fiber. This porous metal foil has a first side having a higher glossiness, and a second side having a lower glossiness located on the opposite side of the first side. The ratio of glossiness Gof the first side to glossiness Gof the second side, G/G, as measured at incident and reflection angles of 60 degrees in accordance with JIS Z 8741 (1997) is from 1 to 15. The present invention provides a highly useful porous metal foil which has a reduced difference in properties between both sides, in addition to the superior properties attributable to a porous metal foil, in a highly productive and cost effective manner that is suited for continuous production.

Porous metal foil and production method therefor

A porous metal foil of the present invention comprises a two-dimensional network structure composed of metal fibers. This porous metal foil has superior properties and can be obtained in a highly productive and cost effective manner.

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Ageo, Japan

Joe Nishikawa