Patent ID: 8974856
Filing Date: 2015-03-10
Classification: C04B,C23C,H01G,Y10T

Abstract:
1. A method for fabricating a ceramic film on a copper substrate, the method comprising the steps of: (a) applying onto a copper substrate a layer of a sol-gel composition comprising a precursor of a ceramic material in 2-methoxyethanol; (b) drying the layer of step (a) at a temperature up to about 250° C. in air; (c) pyrolyzing the dried layer from step (b) at a temperature in the range of about 300 to about 450° C. under a flowing stream of an inert gas to form a ceramic film from the ceramic precursor; (d) optionally applying one or two additional layers of the sol-gel composition onto the ceramic film from step (c) and repeating steps (b), and (c) for each additional layer, to build up a thicker ceramic film on the copper substrate; (e) crystallizing the ceramic film at a temperature in the range of about 600 to about 750° C. under a flowing stream of an inert gas; and (f) optionally applying one or more additional layers of the sol-gel composition onto the crystallized ceramic film from step (e), and repeating (b), (c), (d), and (e) for each additional layer; wherein the flowing stream of inert gas in step (e) maintains a partial pressure of oxygen (pO