Patent ID: 6354902
Filing Date: 2002-03-12
Classification: H01J,H01L

Abstract:
A method of producing a color selection electrode used for a cathode ray tube including an electron gun and a phosphor screen,said color selection electrode being positioned between the electron gun and the phosphor screen and having apertures though which an electron beam generated from the electron gun selectively passes to the phosphor screen; said method comprising the steps of: depositing a first resist on both surfaces of a metal substrate, a first plane of the substrate facing the electron gun and a second plane of the substrate facing the phosphor screen, and patterning the same by photolithography; electrodepositing a metal on portions of the first plane of the substrate where the first resist is not formed to form an electrodeposited metal layer; depositing a second resist on the entire surface of the substrate which is directed to the first plane to cover the first resist and the electrodeposited metal layer; using the first resist as a mask and etching the second plane of the substrate; removing the first resist and the second resist; and; wherein, in the step of forming the electrodeposited metal layer, a metal is simultaneously electrodeposited on the second plane of the substrate as well.