Metal plate, method of manufacturing metal plate, and method of manufacturing mask by use of metal plate
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United States of America Patent
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Aug 4, 2020
Grant Date -
Jul 12, 2018
app pub date -
Mar 6, 2018
filing date -
Sep 13, 2013
priority date (Note) -
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Abstract
The object of the present invention is to provide a metal plate having an excellent transportability. A maximum value of a steepness degree at a central area in a width direction of the metal plate is not more than 0.4%. In addition, the maximum value of the steepness degree at the central area is not more than a steepness degree at one end side area, and is not more than a steepness degree at the other end side area. Further, a difference between the maximum value of the steepness degree at the one end side area and the maximum value of the steepness degree at the other end side area is not more than 0.4%.
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