Patent ID: 6048244
Filing Date: 2000-04-11
Classification: H01J,H04N,Y10T

Abstract:
A method of providing a resistive focusing lens structure for an electron beam device comprising electron-beam means for producing at least one electron beam directed to a surface, said focusing lens structure being provided on an inside surface of a glass member to be positioned around the path of said at least one electron beam, said method comprising:forming a suspension of particles of a mixture of, by weight, of about 33%-50% of an oxidic conductive material comprising about 40%-60% of a lead ruthenate, about 25%-38% of a lead titanate and about 2%-15% of a ruthenium oxide and of about 50%-67% of a glass comprising about 30%-40% of SiO.sub.2, about 3%-7.5% of Al.sub.2 O.sub.3 and about 53%-67% of PbO in a suspending medium consisting essentially of a non-acidic organic liquid having a boiling point of less than 150.degree. C., applying said suspension to said inside surface to thereby provide a coating of said particles on said inside surface, firing said coating at a temperature of 700.degree. C.-900.degree. C. and, before or after firing said coating, patterning said coating.