Patent ID: 6863699

Claim:
A method of depositing lithium phosphorus oxynitide on a substrate, the method comprising: (a) loading a substrate into a vacuum chamber having a target comprising lithium phosphate; (b) introducing a process gas comprising nitrogen into the chamber and maintaining the gas at a pressure of less than about 15 mTorr; and (c) forming a plasma of the process gas in the chamber that generates an ion flux to the substrate of at least 0.1 mA/cm 2 and less than 5 mA/cm 2 by; (i) maintaining the substrate at a negative potential of from about 5 to about 200 V; (ii) biasing the target relative to an electrode in the chamber at a power level; and (iii) maintaining non-equal magnetic field strengths about the target, whereby the lithium phosphorous oxynitride deposited on the substrate has a lithium ion conductivity of at least about 2×10 −6 S/cm.