The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 12, 2002
Filed:
Mar. 04, 1999
Shinzo Takei, Kanagawa, JP;
Sony Corporation, , JP;
Abstract
A color selection electrode and a method of producing the same, for a high definition cathode ray tube with a finer pitch of mask apertures free from limitations due to the thickness of the iron-alloy plate of the mask. The method comprising, the steps of depositing a first resist on both a surface of an iron-alloy plate comprised of a low carbon steel plate, a surface facing an electron gun (small diameter side) and another surface facing a phosphor screen (large diameter side) and patterning the resist by photolithography; forming an electrodeposited metal layer on portions of the electron gun side of the iron-alloy plate where the first resist is not formed; depositing a second resist on the entire surface of the iron-alloy plate which is directed to the electron gun side to cover the first resist and the electrodeposited metal layer; using the first resist as a mask and etching the surface of the iron-alloy plate which is directed to the phosphor screen side; and removing the first resist and the second resist.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile