Patent ID: 8796097
Filing Date: 2014-08-05
Classification: H01L

Abstract:
1. A method of forming a HEMT device on a plurality of thin film layers on a substrate, the method comprising: forming an ultra-thin barrier layer on the plurality of thin film layers, wherein the ultra-thin barrier layer has a barrier thickness of about 0.2 nm to about 20 nm; forming a dielectric thin film layer over a portion of the ultra-thin barrier layer to leave exposed areas of the ultra-thin barrier layer, wherein the dielectric thin film layer has a thickness of about 1 nm to about 100 nm; forming an SAG S-D thin film layer over the exposed areas of the ultra-thin barrier layer while leaving the dielectric thin film layer exposed, wherein the SAG S-D thin film layer has a thickness of about 3 nm to about 15 nm; removing the dielectric thin film layer to expose the underlying ultra-thin barrier layer; treating with fluorine the underlying ultra-thin barrier layer exposed by removal of the dielectric thin film layer to form a treated area; adding a source and drain on the SAG S-D thin film layer; depositing a dielectric coating over the ultra-thin barrier layer treated with fluorine such that the dielectric coating is positioned between the source and the drain; and positioning a gate electrode on the dielectric coating.