METAL FOIL FOR SPRING MEMBER, PRODUCTION METHOD FOR METAL FOIL FOR SPRING MEMBER, AND SPRING MEMBER FOR ELECTRONIC DEVICE
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United States of America
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Issued Date -
Nov 28, 2024
app pub date -
Aug 6, 2024
filing date -
Aug 6, 2024
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Abstract
A metal foil for a spring member includes a first region on which the spring member is formed. The first region has a square shape with one side being 300 mm. In the first region, an absolute value of a difference value obtained by subtracting variance of a thickness in a width direction orthogonal to a rolling direction from variance of a thickness in the rolling direction is less than or equal to 0.15 μm2. In the first region absolute value obtained by subtracting a second maximum value from a first maximum value is less than or equal to 0.8 μm2.
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