Patent ID: 9490314
Filing Date: 2016-11-08
CPC Classification: C23C,H01L

Claim Text:
1. A method of deposition of a voltage-tunable dielectric material onto a substrate comprising a conductive electrode, the method comprising: simultaneously providing respective gradients in at least two grain size defining parameters of the deposition, the respective gradients occurring for a first time period thereby producing a smoothly changing columnar crystalline habit of the voltage-tunable dielectric material, a first grain size defining parameter, of the at least two grain size defining parameters, comprises substrate temperature, a starting substrate temperature in the first time period being in a range of about 20° C. to about 300° C. and an ending substrate temperature in the first time period being in a range of about 600° C. to about 1000° C., and a second grain size defining parameter, of the at least two grain size defining parameters, comprises one or more of deposition power, and pressure of a deposition chamber in which the deposition is occurring; and, when the first time period has ended, continuing deposition for a second time period where the grain size defining parameters are held constant.