Patent ID: 6455998
Filing Date: 2002-09-24
Classification: C03C,G09F,Y10T

Abstract:
A labeled cathode ray tube, comprising:(a) a cathode ray tube ceramic surface having a first coefficient of thermal expansion; and (b) a fired composite ceramic label attached to said cathode ray tube ceramic surface, said composite ceramic label comprising: (A) a fired ceramic body comprising a base layer wherein at least a portion of the base layer proximal to the cathode ray tube ceramic surface has a second coefficient of thermal expansion, said base layer including: (i) a first glassy phase; and (ii) a first refractory phase interspersed with said first glassy phase; said first glassy phase bonding said label to said substrate; and (B) a top layer provided on said fired ceramic label body, wherein there is sufficient color contrast between said top layer and said fired ceramic body such that a code pattern is optically discernible, wherein said composite ceramic label includes said code pattern, and wherein the ratio of the first coefficient of thermal expansion to the second coefficient of thermal expansion is in the range from 0.8:1.0 to 1.0:0.8.