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US 4,879,261 AGranted
Low Dielectric constant compositions
AssigneeE. I. Du Pont de Nemours and Company
InventorIan Burn
Life of this patent
Estimating the term…
Abstract
An alkali-free composition for making a ceramic dielectric body having a dielectric constant less than 5.0, which is a mixture of finely divided particles consisting essentially of 70-85% wt. silica and 15-30% wt. zinc borate flux. This composition can be used to make green tape and multilayer devices having internal copper conductors such as multilayer capacitors and multilayer interconnects.
Claims8
An alkali-free composition for forming a ceramic dielectric body having a dielectric constant less than 5.0, which is a mixture of finely divided particles consisting essentially of:
- (a) 70-85% by weight silica particles and
- (b) 15-30% by weight zinc borate flux particles.
Dependencies are inferred from the claim text.