Patent ID: 7618888
Filing Date: 2009-11-17
Classification: C23C,H01L

Abstract:
1. A method of filling nano-sized features of a patterned substrate with metal using an Ionized Physical Vapor Deposition (IPVD) system, the method comprising: positioning the patterned substrate in a processing chamber on a substrate holder having a backside gas heating assembly coupled thereto; establishing a first substrate temperature at a first temperature of between approximately 50 degrees Celsius and approximately 250 degrees Celsius by controlling the backside gas heating assembly and a first thermal conductivity value between the patterned substrate and the substrate holder to establish a first substrate holder temperature at said first temperature; depositing the metal onto the patterned substrate by exposing the patterned substrate to a first dry-filling plasma during a first dry-filling time while maintaining the patterned substrate's temperature at said first temperature by controlling the fast-reacting backside gas heating assembly and the first thermal conductivity value to maintain the substrate holder temperature at said first temperature; extinguishing the first dry-filling plasma during a first shutdown time; establishing a second substrate temperature at a second temperature by controlling the backside gas heating assembly and a second thermal conductivity value different than the first conductivity value between the patterned substrate and the substrate holder to establish a second substrate holder temperature at said second temperature, wherein the backside gas heating assembly is operable to establish the second substrate holder temperature during a time that is substantially similar to the first shutdown time; exposing the patterned substrate to a second dry-filling plasma during a second dry-filling time while maintaining the patterned substrate's temperature at said second temperature; extinguishing the second dry-filling plasma during a second shutdown time; and removing the patterned substrate from the processing chamber; the method further comprising: establishing the first thermal conductivity value by providing a first backside gas pressure between the patterned substrate and the substrate holder when creating the first dry-filling plasma, wherein the first backside gas pressure is established between approximately 0 Torr and approximately 10 Torr; and establishing the second thermal conductivity value by providing a second backside gas pressure between the patterned substrate and the substrate holder when creating the second dry-filling plasma, wherein the second backside gas pressure is different than the first backside gas pressure and is established between approximately 0 Torr and approximately 8 Torr; and changing the first thermal conductivity value by cycling the first backside gas during the first dry-filling time, wherein the first backside gas pressure is cycled between a first pressure value and a second pressure value, the first pressure value being between approximately 0 Torr and approximately 10 Torr and the second pressure value being between approximately 2 Torr and approximately 10 Torr.