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US 5,393,465 AGranted
Light-absorbing dielectric compositions
AssigneeE. I. Du Pont de Nemours and Company
InventorsLorri P. Drozdyk, Roger H. French, Kenneth W. Hang, Arvind Halliyal
Life of this patent
Estimating the term…
Abstract
A composition for making fired dielectric layers which is especially suitable for laser scribing consisting essentially of finely divided particles of dielectric glass, inorganic filler having a refractive index higher than the glass and cobalt oxide, all being dispersed in organic medium. The composition can be in the form of either thick film paste or green tape.
Claims10
A composition for making fired layers which are especially suitable for laser scribing consisting essentially of finely divided particles of:
- (a) 68.0-94.99% wt. dielectric glass;
- (b) 5-30% wt. inorganic filler having a particle size between 0.3-3 microns and a refractive index at least 0.07 higher than the refractive index of the dielectric glass;
- and
- (c) 0.01-2.0% wt. cobalt oxide having a particle size less than 5 microns and is selected from CoO, Co.sub.3 O.sub.4 and mixtures thereof, all of (a), (b), and (c) being dispersed in;
- (d) an organic medium.
2 more elements
Dependencies are inferred from the claim text.