Dowa Metaltech Co., Ltd.

Dowa Mining Co., Ltd.

Satoru Ideguchi

Hideyo Osanai

Hirotaka Kotani

Takayuki Takahashi

Masaaki Higo

A mask for partial plating capable of performing partial electroplating selectively on a prescribed portion on a surface of an electrically isolated metal member provided on an insulated board is provided. Methods for producing an insulated circuit board and using the mask for partial plating are also provided. The mask for partial plating includes an insulated sheet member having an opening corresponding to the portion to be plated, and a structure including a partial region on one surface in the thickness direction of the insulated sheet member being coated with one or plural conductive sheet members attached to the region. The conductive sheet member is adhered to the surface of the insulated sheet member, for example, with an adhesive or an adhesive member. The conductive sheet member may be engaged in a recessed portion formed on the surface of the insulated sheet member.

Method for producing insulated circuit board using a mask and partial plating method using the mask

A heat radiating plateof a metal material includes a flat plate portion, a large number of columnar protruding portionswhich protrude from one major surface of the flat plate portion and which are integrated with the flat plate portion, and a reinforcing plate memberof a material, which has a higher melting point than that of the flat plate portion and columnar protruding portions and which is arranged in a region, which is arranged in the flat plate portion and which is close to one major surface of the flat plate portion, the reinforcing member passing through the flat plate portion to extend in directions substantially parallel to the one major surface of the flat plate portion and having end faces exposed to the outside, the whole surface of the reinforcing member except for the end faces being bonded directly to the flat plate portion.

Heat radiating plate and method for producing same

Heat radiating plate with supporting members and protrusion members

A metal/ceramic bonding substrate includes: a ceramic substrate; a metal plate bonded directly to one side of the ceramic substrate; a metal base plate bonded directly to the other side of the ceramic substrate; and a reinforcing member having a higher strength than that of the metal base plate, the reinforcing member being arranged so as to extend from one of both end faces of the metal base plate to the other end face thereof without interrupting that the metal base plate extends between a bonded surface of the metal base plate to the ceramic substrate and the opposite surface thereof.

Metal/ceramic bonding substrate and method for producing same

When an aluminum plate is bonded directly to a ceramic substrate by cooling and solidifying molten aluminum which is injected into a mold so as to contact the ceramic substrate arranged in the mold, an additive, such as a TiB alloy, Ca or Sr, for decreasing the grain size of the aluminum plate to 10 mm or less while preventing the drop in thermal conductivity of the aluminum plate from the thermal conductivity of a pure aluminum plate from exceeding 20% of the thermal conductivity of the pure aluminum plate is added to the molten aluminum. When an aluminum alloy plate of an aluminum-silicon alloy is bonded directly to a ceramic substrate by cooling and solidifying a molten aluminum-silicon alloy which is injected into a mold so as to contact the ceramic substrate arranged in the mold, an aluminum-silicon alloy containing 0.1 to 1.5 wt % of silicon and 0.03 to 0.10 wt % of boron is injected into the mold.

Growing community of inventors

Nagano, Japan

Satoru Ideguchi