Blackening of non iron-based flat tensioned foil shadow masks

Details Blackening of non iron-based flat tensioned foil shadow masks Blackening of non iron-based flat tensioned foil shadow masks

Category

H - Electricity

Subcategory

01

Subsubcategory

J

CPC

316/12, 313/35.1

IPC codes

H01J 29/07 (2006.01) H01J 9/14 (2006.01)

Type

Patent

Patent number

CA 1312910

Description

Abstract of the Disclosure The power handling capacity of non iron-based flat tensioned foil shadow masks for flat faceplate cathode ray tubes (CRTs) is enhanced by providing the flat tensioned mask (FTM) with a thin outer layer of iron, which is converted to iron oxide by blackening, or heating. The iron layer, which is preferably at least 0.04 mil thick, is deposited on the FTM by electroplating in a ferrous ammonium sulfate bath- either before or after chemical etching of the FTM. The thin iron layer increases FTM emissivity and reduces FTM doming at high electron beam energies. The iron coating may be blackened in the frit-like cycle during CRT assembly or in a separate heating operation. A blackened outer layer of cobalt may also be used to increase FTM emissivity.

Application Number

594976

Affiliated with

Also associated with

Rating

Blackening of non iron-based flat tensioned foil shadow masks does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Blackening of non iron-based flat tensioned foil shadow masks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Blackening of non iron-based flat tensioned foil shadow masks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1186213