International Business Machines Corporation

Craig Neal Johnston

John M Lauffer

Christina Marie Boyko

Chi Shih Chang

Michael Joseph Johnson

James R Loomis

Carl E Samuelson

Ricahrd A Schumacher

A transformer comprises a printed circuit board having elongated conductors printed thereon, a ferrite core having a bottom mounted onto the printed circuit board and a flex circuit. The flex circuit comprises a dielectric sheet and elongated conductors printed on both faces of the sheet. The flex circuit is contoured around a top and sides of the core. The conductors of the flex circuit are surface bonded to respective conductors of the printed circuit board to form a series of primary windings and a series of secondary windings around the core. Provision of the upper portions of the windings by means of the flex circuit is economical because it does not require handling of discrete conductor portions.

Transformer formed in conjunction with printed circuit board

A composition of enhanced thermal conductivity which comprises a tetrabrominated diglycidyl ether polyepoxide; and epoxy polymer having an epoxy functionality of 3.5 to 6; zinc oxide and curing agents; and use thereof.

Epoxy composition of increased thermal conductivity and use thereof

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Concord, NH, United States of America

Craig Neal Johnston