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US 4,230,773 AGranted
Decreasing the porosity and surface roughness of ceramic substrates
AssigneeInternational Business Machines Corporation
InventorPeter Bakos
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Abstract
The porosity and surface roughness of ceramic substrates are improved by coating the surface with silicon compounds, drying the coated substrate, and then subjecting the substrate to elevated temperature so as to convert the silicon compounds to silicon oxides. Coated substrates obtained by the above process as well as specific preferred organosilane compositions are provided.
Claims32
A method for reducing the porosity and surface roughness of a ceramic substrate which comprises
- applying a liquid coating composition containing at least one nonpolymeric silicon compound selected from the group of organosilanes, silicon halides, or mixtures thereof to at least one surface of said substrate;
- drying the coated substrate;
- and
- exposing the dried coated substrate to an elevated temperature higher than that employed in the drying of the coated substrate to thereby convert the nonpolymeric silicon compound to silicon oxides, and thereby obtaining a ceramic substrate having reduced porosity and surface roughness.
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Dependencies are inferred from the claim text.