Patent ID: 6454919
Filing Date: 2002-09-24
Classification: C23C,H01L

Abstract:
A physical vapor deposition apparatus including at least one workpiece processing chamber and a programmable control device for controlling process variables within said processing chamber, wherein said control device contains instructions to vary the power to an aluminum-comprising sputtering target during deposition of an aluminum layer, wherein the rate of aluminum deposition is increased as deposition proceeds, and wherein said control device contains instructions to enable the deposition of the first 15-35% of said aluminum layer using a DC target power of about 0.5 kW to about 1.5 kW, the second 50-70% of the aluminum layer using a DC target power of about 2.0 kW to about 3.5 kW, and the last 10-30% of the aluminum layer using a DC target power of about 10 kW to about 14 kW, and wherein said control device contains instructions to control said workpiece surface at a temperature ranging between about 380Â° C. and about 500Â° C. during said aluminum deposition, whereby features are completely filled in a patterned semiconductor substrate.