公开(公告)号：US20240023234A1

公开(公告)日：2024-01-18

申请号：US18035926

申请日：2021-10-19

Applicant: NHK SPRING CO., LTD.

Inventor： Shinya YANO ,  Misao UETAKE

IPC: H05K1/02 ,  H05K3/20

CPC classification number: H05K1/0265 ,  H05K3/20 ,  H05K2201/0367 ,  H05K2203/0369

Abstract: A circuit pattern is obtained, capable of being easily applicable to current increase, making short circuit or ion migration between adjacent circuit conductors hard to be generated, and allowing a circuit pattern to be tightly arranged. A circuit pattern comprises a circuit conductor to be layered on a metal substrate through an insulating layer, an intermediate portion in a layer direction having a swelled shape in a layer-crossing direction in a cross section of the circuit conductor, and the swelled shape is formed by a gentle face in the layer direction.