Method for making thin film field effect transistors
AssigneeThe United States of America as represented by the Secretary of the Army
InventorRobert L. Brown
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Abstract
A method for making thin film field effect transistors that utilize a semnductor material that is altered by acid etching and providing steps for producing the transistors such that the semiconductor material is protected from the acid solutions and therefore preventing the semiconductor material from being altered in the process of making the transistors.
Claims3
A method for making thin film field effect transistors comprising providing a substrate that has a substantially flat surface thereon, mounting a thin metal film on said surface of said substrate, photolithographic and acid etching first and second connections from said thin metal film to define a predetermined gap between said first and second connections, depositing a layer of semiconductor material in said gap and overlapping portions of said first and second connections, depositing an impervious insulation layer that overlaps all sides of said semiconductor layer over said semiconductor and a portion of said first and second connections, depositing a metal layer as a gate over said insulation layer and photolithographic and acid etching said metal gate to a size that is substantially identical in width to the gap between said first and second connections to provide a thin film field effect transistor that has high frequency characteristics due to the materials of the transistor and the precision by which the transistor can be made.
Dependencies are inferred from the claim text.