Shielding screen, shielding screen raw sheet and method for producing shielding screen


Application Number: 00126262
Application Date: 2000.08.30
Publication Number: 1287377
Publication Date: 2001.03.14
Priority Information: 1999/9/6 JP 251950/99
International: H01J9/14;H01J29/06
Applicant(s) Name: Dai Nippon Printing Co., Ltd.
Address:
Inventor(s) Name: Omatsu Takayasu;Ochiai Yomitsu;Hirata Akira
Patent Agency Code: 11105
Patent Agent: yang wu
Abstract A shadow mask is formed from a plate member comprising an outer frame portion, a body portion of a shadow mask having an outer peripheral line formed through an etching process and a plurality of connection portions through which the body portion of the shadow mask is supported by the outer frame portion. The shadow mask is formed from the plate member by removing the outer frame portion from the body portion of the shadow mask. In this process, a break portion is formed to the shadow mask by removing the outer frame portion so as to be recessed inward from the outer peripheral line of the shadow mask.