公开(公告)号：US20250084499A1

公开(公告)日：2025-03-13

申请号：US18824038

申请日：2024-09-04

Applicant: DAI NIPPON PRINTING CO., LTD.

Inventor： Yusuke NAKAMURA ,  Goro ISHIKAWA ,  Hiroshi YANO ,  Hiroshi NUMATA ,  Hiroki OKA

IPC: C21D7/00 ,  B21B1/38 ,  B21B38/02

Abstract: To provide a metal plate which is elongated and has a high homogeneity in a wider range, a method for manufacturing the metal plate, a metal mask obtained from the metal plate, and a method for manufacturing the metal mask. Provided is a metal plate which is elongated and is to be used for manufacturing a metal mask, in which when a differential expansion rate En in a unit length L0 in a longitudinal direction for an arbitrary position n in a width direction of the metal plate is measured at each of an arbitrary plurality of positions in the longitudinal direction, a difference in the differential expansion rate En in a central portion in the width direction is 9.0×10−6 or less at a plurality of the positions, and the central portion is a portion that occupies 80% in the width direction of the metal plate excluding both side portions that occupy 10% in the width direction.