Toppan Printing Co., Ltd.

Masashi Kurata

Kiyoaki Nishitsuji

Naoko Mikami

Reiji Terada

Takehiro Nishi

Daisei Fujito

Mikio Shinno

Sumika Tamura

Kenta Takeda

Sumika Akiyama

A rolled metal sheet includes an obverse surface and a reverse surface that is a surface located opposite to the obverse surface. At least either one of the obverse surface and the reverse surface is a processing object. A method for manufacturing a metal mask substrate includes reducing a thickness of the rolled metal sheet to 10 &#x3bc;m or less by etching the processing object by 3 &#x3bc;m or more by use of an acidic etching liquid, and roughening the processing object so that the processing object becomes a resist formation surface that has a surface roughness Rz of 0.2 &#x3bc;m or more, thereby obtaining a metal mask sheet.

Method for producing base for metal masks, method for producing metal mask for vapor deposition, base for metal masks, and metal mask for vapor deposition

The ratio of the difference between a surface distance L at each of the different positions in a width direction DW of a metal sheet and a minimum surface distance Lm to the minimum surface distance Lm is an elongation difference ratio. The elongation difference ratio in a center section in the width direction DW of the metal sheet is less than or equal to 3&#xd7;10. The elongation difference ratios in two edge sections in the width direction DW of the metal sheet are less than or equal to 15&#xd7;10. The elongation difference ratio in at least one of the two edge sections in the width direction DW of the metal sheet is less than the elongation difference ratio in the center section in the width direction of the metal sheet.

Vapor deposition mask base material, vapor deposition mask base material manufacturing method, and vapor deposition mask manufacturing method

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Tokyo, Japan

Masashi Kurata