Patent ID: 6291348
Filing Date: 2001-09-18
Classification: H01L,Y10T

Abstract:
A method of fabricating a copper-calcium-oxide (Cu--Ca--O) thin film on a copper (Cu) surface formed on a semiconductor device by treating the Cu surface in a chemical solution, comprising the steps of:(1) providing the semiconductor substrate;(2) providing the chemical solution, the chemical solution comprising:a. at least one calcium (Ca) ion source for providing a plurality of Ca ions;b. at least one complexing agent for complexing the plurality of Ca ions;c. at least one copper (Cu) ion source for providing a plurality of Cu ions;d. at least one complexing agent for complexing the plurality of Cu ions;e. at least one pH adjuster;f. at least one reducing agent for facilitating deposition of the plurality of Cu ions;g. at least one wetting agent for stabilizing the chemical solution; andh. a volume of water,(a) through (g) being dissolved in (h);(3) immersing the Cu surface in the chemical solution, thereby forming the Cu--Ca--O thin film on the Cu surface;(4) rinsing the Cu--Ca--O thin film formed on the Cu surface in water;(5) drying the Cu--Ca--O thin film formed on the Cu surface under a gaseous nitrogen flow (GN.sub.2); and(6) completing formation of the semiconductor device.