Patent ID: 6063436
Filing Date: 2000-05-16
Classification: C23C

Abstract:
A method of depositing successive layers of first and second coating materials onto a substrate, the method comprising:placing the substrate in a vacuum chamber having a source of the first coating material and the second coating material;placing a first shadow mask between the substrate and the coating material source, wherein the first shadow mask is spaced from the substrate, and is shaped to compensate for nonuniformities in a flow of the first coating material;directing a flow of the first coating material from the coating material source toward the mask and the substrate so that the first coating material forms a substantially uniformly thick first layer on the substrate;placing a second shadow mask between the substrate and the coating material source, wherein the second shadow mask is spaced from the substrate, and is shaped to compensate for nonuniformities in a flow of the second coating materialdirecting a flow of the second coating material from the coating material source toward the substrate so that the second coating material forms a substantially uniformly thick second layer on the first layer of first coating material.