Patent ID: 9589835
Date: 2017-03-07
CPC Classifications: C23C,H01L

Claim:
1. A method of forming a tungsten layer on a substrate surface, the method comprising: receiving a substrate having an exposed deposited tungsten layer on a planar surface of the substrate, wherein the deposited tungsten layer has a thickness T removing a top portion of the deposited tungsten layer to form a tungsten bulk layer having thickness Td on the planar surface, wherein Td is less than T halting the removing once the top portion is removed and the tungsten bulk layer has a thickness of Td, and further comprising introducing a fluorine-containing compound to a remote plasma generator upstream of a chamber that houses the substrate, generating atomic fluorine within the remote plasma generator, and flowing atomic fluorine from the remote plasma generator to the chamber to remove the top portion of the deposited tungsten layer.