Patent ID: RE42887

Claim:
A process for achieving a predetermined value in a desired property selected from residual stress and electrical resistivity in a product ceramic film deposited on a substrate by low pressure chemical vapor deposition, the ceramic being formed from a metallic element and a non-metallic element, the product ceramic film being formed by supplying a metallic element precursor to a reaction chamber, separately supplying a non-metallic element precursor different from the metallic element precursor to the reaction chamber under conditions of temperature and pressure such that the metallic element precursor and the non-metallic element precursor react to form the product ceramic film on a substrate inside the reaction chamber, the process comprising (a) selecting pressure or flow rate of the metallic element precursor as the control variable, (b) determining the relationship between the desired property and the control variable when the remaining variables in the low temperature vapor deposition process are held at selected fixed values, and (c) during formation of the product ceramic film, achieving the predetermined value for the desired property by controlling the control variable while maintaining the remaining variables at the above selected fixed values.