Patent · US Expired

Process and apparatus for producing a black matrix layer

US4889781A · kind A · utility

0Cited by

1References

7Claims

0Family size

Assignee

Nokia Graetz · DE

Inventors

Volker Gerstle · Lorsch, DE
Gerhard Mauz · Köngen, DE

Key dates

Filing date	May 19, 1988
Grant date	Dec 26, 1989
Priority date	—
Expiry date	May 19, 2008

Classification

Technology area (CPC H)Electricity
CPC primaryH01J9/2278
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

During the formation of a black-matrix layer on the inside surface of a faceplate of a color picture tube, the development of the photoresist coating takes place in an atmosphere with a relative humidity of between about 80-100% and at a temperature of between about 30.degree.-50.degree. C.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.