Patent ID: 6635220
Filing Date: 2003-10-21
Classification: B22F,C23C,Y10T

Abstract:
A method for forming a composite deposited film with varied compositions formed in an initial and a final stage of evaporation, comprising the steps of:heating under a reduced pressure a composite vapor deposition material which comprises a high vapor pressure metal envelope having a cavity therein, and a mixture of a high vapor pressure metal powder and a low vapor metal powder packed in the cavity and formed in a composite structure, the low vapor pressure metal powder being dispersed and held by the high vapor pressure metal powder in a core region of the high vapor pressure metal body and distributed uniformly in the longitudinal direction of the body, and vaporizing the high and low vapor pressure metals to deposit a composite deposited film on a substrate being deposited, the composite deposited film being rich in the high vapor pressure metal in an initial evaporation stage, rich in the low pressure metal in a final evaporation stage and of varied composition in an intermediate stage between the initial evaporation stage and the final evaporation stage.