Patent ID: 7052918
Filing Date: 2006-05-30
Classification: H01L

Abstract:
1. A method for fabricating a multi-layer film for a thin film structure, the method comprising: forming an intermediate layer on a first layer having a first element; and forming a second layer on the intermediate layer, the second layer comprising a second element different from the first element, wherein the intermediate layer is comprised of both the first and second elements, wherein a concentration of the second element, in the intermediate layer, gradually varies from a portion of the intermediate layer contacting with the first layer to a portion of the intermediate layer contacting with the second layer so that the concentration of the second element is relatively high in the portion of the intermediate layer adjacent to the second layer, wherein the first layer includes an oxide or nitride material of the first element, and the first element is selected from the group consisting of aluminum, zirconium, cerium, titanium, yttrium, and niobium, wherein forming the intermediate layer includes a reaction cycle comprising: wherein the reaction cycle is repeatedly performed under different conditions sequentially changed for progressive repetitions of the reaction cycle, such that the compositions of materials generated by the reaction cycle are sequentially changed, whereby the intermediate layer has concentration gradation.