METHOD FOR MANUFACTURING DEPOSITION MASK, METHOD FOR MANUFACTURING DISPLAY DEVICE, AND DEPOSITION MASK INTERMEDIATE
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United States of America
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Dec 30, 2021
app pub date -
Sep 14, 2021
filing date -
Sep 14, 2021
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Abstract
A method includes: preparing a metal sheet and a glass substrate in which an absolute value of a difference in linear expansion coefficient between the glass substrate and the metal sheet is less than or equal to 1.3×10−6/° C. in a temperature range between 25° C. and 100° C. inclusive; joining the glass substrate to the metal sheet with a plastic layer in between; forming a mask plate from the metal sheet by forming mask holes in the metal sheet joined to the glass substrate; joining, to a mask frame, a surface of the mask plate that is opposite to a surface in contact with the plastic layer, the mask frame having a higher rigidity than the mask plate and having a shape that surrounds the entire mask holes; and removing the plastic layer and the glass substrate from the mask plate joined to the mask frame.
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