Matsushita Electric Works, Ltd.

Ryuji Ohtani

Isao Fuwa

Yoshimitsu Nakamura

Kazuo Kamada

Toshiyuki Suzuki

Takeshi Okamoto

Masao Torigoe

Yosiyuki Uchinono

Noboru Kusano

Shoichi Hongo

Masahiro Ikegami

Hidezumi Okamura

Kunzi Nakashima

A saw blade preventing 'fluff' or 'return' of fibers from occurring when used to cut wood or the like object and rendering any finishing work unnecessary is formed with a unique combination of cutting teeth and biting teeth, the biting teeth being disposed, on a cut path mainly by means of the cutting teeth, either on top surface of or in front of each cutting tooth in cutting direction of the saw blade and to have a smaller width than the cutting teeth, for realizing a biting operation by the biting teeth and the cutting operation by the cutting teeth in the same sawing step.

Saw blade

A method for manufacturing a printed circuit board is to form on a top surface of an insulating substrate a layer of such plating ground as a metal film, to irradiate such electromagetic wave as a laser to a boundary edge zone of non-circuit parts with respect to circuit-printing parts on the insulating substrate in correspondence to a pattern of the non-circuit parts to remove the plating ground layer at the part irradiate by the electromagnetic wave with the plating ground layer at the non-irradiated part left as formed, and thereafter to form a plating on the surface of the plating ground layer at the non-irradiated parts, whereby it is enabled to allow the laser irradiation to be carried out only with respect to the boundary edge zone of the non-circuit parts, without irradiating all over the non-circuit parts.

Method for manufacturing printed circuit board

Growing community of inventors

Kadoma, Japan

Ryuji Ohtani