Title:
MANUFACTURE OF METALLIC SHEET FOR SHADOW MASK
Document Type and Number:
Japanese Patent JPS63128119
Kind Code:
A
Abstract:
PURPOSE: To obtain an Fe-Ni alloy sheet having superior etchability by which holes of uniform diameter and shape are pierced and giving a high quality shadow mask causing no irregularity by carrying out final cold rolling at a specified draft.
CONSTITUTION: An Fe-Ni alloy is melted, cast, forged, hot rolled and pickled. In is subjected to properly repeated cold rolling and annealing, the grain size is regulated to grain size No. ≥7 by annealing before final cold rolling and the final cold rolling is carried out at >50% draft to manufacture a metallic sheet. When holes for passing electron beams are pierced the metallic sheet by etching, a high accuracy shadow mask for a color image receiving tube can be produced.
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Inventors:
YUKI NORIO
TSUJI MASAHIRO
KOSEKI YOSHIHIRO
TSUJI MASAHIRO
KOSEKI YOSHIHIRO
Application Number:
JP27204886A
Publication Date:
May 31, 1988
Filing Date:
November 17, 1986
Export Citation:
Assignee:
NIPPON MINING CO
International Classes:
C21D8/12; C21D8/02; C21D9/46; (IPC1-7): C21D8/12
Attorney, Agent or Firm:
Motohiro Kurauchi (1 outside)