Patent ID: 9558996
Date: 2017-01-31
CPC Classifications: H01L

Claim:
1. A method for filling a trench with a metal layer, comprising: providing a deposition apparatus, wherein the deposition apparatus comprises a heater; providing a substrate and a dielectric layer disposed thereon, wherein the dielectric layer includes a trench; performing a first deposition process to fill the trench with a metal layer, wherein a temperature of the substrate is ramped up from 15 degrees Celsius to 30 degrees Celsius to a predetermined temperature in the first deposition process, the predetermined temperature is between 380 degrees Celsius and 420 degrees Celsius and during the first deposition process, no heat transferring gas is supplied by the heater; and performing a second deposition process when the temperature of the substrate reaches the predetermined temperature, so as to completely fill the trench with the metal layer, wherein the heater has the predetermined temperature and a heat transferring gas is supplied by the heater.