METAL FOIL FOR SPRING MEMBER, SPRING MEMBER FOR ELECTRONIC DEVICE, PRODUCTION METHOD FOR METAL FOIL FOR SPRING MEMBER, AND PRODUCTION METHOD FOR SPRING MEMBER FOR ELECTRONIC DEVICE

WIPO Patent Application WO/2023/153009

A1

This metal foil comprises a first region that is the shape of a square having a side length of 300 mm and that is for forming a spring member. A first difference is the difference between the maximum value and the minimum value of a first thickness at points upon a straight line along the rolling direction in the first region, and a second difference is the difference between the maximum value and the minimum value of a second thickness at points upon a straight line along a width direction orthogonal to the rolling direction in the first region. The absolute value of the difference obtained by subtracting the second difference from the first difference is 0.8 μm or less.

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SHIMAMURA SHINICHI (JP)
KOBAYASHI AKIHIKO (JP)
AIZAWA HIROYASU (JP)

PCT/JP2022/035025

August 17, 2023

September 20, 2022

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TOPPAN INC (JP)

C23F1/08; F16F1/02; F16F1/18

JP2014059345A	2014-04-03
JP2014205911A	2014-10-30
JP2005279738A	2005-10-13
JPS59229213A	1984-12-22

ONDA Makoto et al. (JP)

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