Patent ID: 6730351
Filing Date: 2004-05-04
Classification: C23C

Abstract:
A method for forming a light absorption film, composed of a porous metallic vapor deposited film with crystalline grown up in a dendrite structure, in a vacuum vapor deposition, comprising:preliminarily measuring and storing a time profile of targeted electric power in a storage unit by preliminarily applying the targeted electric power to a resistive-heated evaporating boat to measure electric current, flowing through the evaporating boat, and a voltage potential, appearing at both sides of the evaporating boat, that enable a proper film quality to be realized; and controlling current electric power, that is a product of the electric current currently flowing through the evaporating boat and the voltage potential currently appearing at the both sides of the evaporating boat during a current vapor deposition, so as to match the targeted electric power stored in the storage unit.