Patent ID: 9698454
Date: 2017-07-04
CPC Classifications: C23C,H01P

Claim:
1. A process for fabrication of an RF window from a substrate in a chamber, the process comprising: a cleaning step including a rinse step, an acid etching step, a soak step and a drying step applied to at least the surface of said substrate; a substrate heating step wherein said substrate in said chamber is subjected to a flow of inert gas while said substrate is heated to a deposition temperature, said chamber held in a state of partial vacuum; a remote plasma assisted oxidation (RPAO) deposition step wherein said substrate receives a flow of plasma gas formed by mixing an inert gas with oxygen, the plasma gas directed to a surface of said substrate while said chamber is held in a state of partial vacuum; a remote plasma assisted nitridation (RPAN) deposition step wherein said substrate receives a flow of plasma gas formed by mixing an inert gas with nitrogen, the plasma gas directed to a surface of said substrate while said chamber is held in a state of partial vacuum; a TiN deposition step wherein said substrate receives a flow of plasma gas formed by mixing an inert gas with nitrogen, the plasma gas directed to the substrate surface along with reactable titanium in gaseous form, said reactable titanium in gaseous form is Ti tert-butoxide, which is bubbled through glycerin, then heated to substantially 300° C., during which step said depositions chamber is held in a state of partial vacuum; an RPAN cap step wherein said substrate receives a flow of plasma gas formed by mixing an inert gas with nitrogen, the plasma gas directed to the substrate surface, during which step said chamber is held in a state of partial vacuum; a cooling step wherein said substrate receives a flow of inert gas for a duration of time until said substrate reaches a temperature below 100° C., during which time said chamber is held in a state of partial vacuum; a removal step wherein said substrate is removed from said chamber.