PLANAR TRANSFORMER PCB BOARD AND MANUFACTURING METHOD THEREOF

WIPO Patent Application WO/2020/244141

A1

The present invention discloses a planar transformer PCB board and a manufacturing method thereof, comprising: performing gel injection molding on two sides of a PCB substrate with a through hole to form a double-sided winding portion integrated with the PCB substrate; the double-sided winding portion is of a symmetrical structure on the two sides of the PCB substrate, the center of the double-sided winding portion is a via hole consistent with the through hole, and the via hole is aligned with the through hole to form a magnetic core hole for the magnetic core to pass through; the periphery of the via hole is convex to form a wire stop portion; a wire passing groove is formed in a hole wall of the magnetic core hole, and is used for allowing a metal wire to pass through to simultaneously perform in-out planar winding on both sides of the double-sided winding portion, so as to form two series coils arranged on the two sides of the PCB substrate. The present invention does not need to coat a self-adhesive layer on the two sides of the PCB substrate, reduces the time for coating the self-adhesive layer, and solves a series of problems such as the flow phenomenon of the self-adhesive layer during the baking process, the accumulation of the sticky self-adhesive layer during the winding process and the like.

ZHA XIAOYUE (CN)
OUYANG GUO (CN)
REN JINGJING (CN)

PCT/CN2019/115912

December 10, 2020

November 06, 2019

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SHENZHEN SUNLORD ELECTRONICS (CN)

H01F27/28

CN110233028A	2019-09-13
CN207353061U	2018-05-11
US20140327509A1	2014-11-06

CHINA TRUER IP (CN)

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