Tamura Corporation

Toshimi Mizoguchi

Toshihiko Kobayashi

Yukiharu Suzuki

A multi-layer laminated circuit boardA of the present invention is formed by laminating together a multi-layer transformer, a multi-layer part sheetformed with a multi-layer part, and a wiring sheetformed with a circuit pattern. The multi-layer transformeris incorporated into the multi-layer laminated circuit boardA, and therefore a package for the multi-layer transformeris omitted, and the wiring between the multi-layer transformerand other components is reduced to a minimum.

Multilayer laminated circuit board

The multi-layer transformerof the present invention comprises a composite sheetcomprising a center magnetic patternand peripheral magnetic patternthat are formed at the center and periphery respectively, and a dielectric patternof a nonmagnetic body that is formed in a part except the center and periphery; a composite sheetsimilarly comprising a center magnetic pattern, peripheral magnetic patternand a dielectric pattern; a primary windingthat is located on one face of the dielectric pattern; a secondary windingthat is located on one face of the dielectric pattern; and magnetic sheetsandthat hold the composite sheetsand, primary windingand secondary windingfrom both sides and contact one another via the center magnetic patternsandand peripheral magnetic patternsand

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Tokyo, Japan

Toshimi Mizoguchi