Title:
COLOR PICTURE TUBE FINE GAP TYPE SHADOW MASK MANUFACTURING METHOD
Document Type and Number:
Japanese Patent JPS598245
Kind Code:
A
Abstract:
The photographic method utilized for fabricating slit-type shadow masks is improved by utilizing specially-shaped elements in a pattern on one of the photographic masters. In particular, the photographic master includes trapezoidal-shaped elements at locations away from the vicinity of the pattern minor axis, with the larger bases of the trapezoids facing away from the pattern minor axis.
Inventors:
HENRII UIRIAMU KUZUMINSUKI
Application Number:
JP11179783A
Publication Date:
January 17, 1984
Filing Date:
June 21, 1983
Export Citation:
Assignee:
RCA CORP
International Classes:
H01J9/14; (IPC1-7): H01J9/02; H01J29/07
Attorney, Agent or Firm:
Satoshi Shimizu
Next Patent: JPS598246