Patent ID: 11887993
Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A method of making a thin-film transistor comprising:
forming a layered structure that includes a nonconductive substrate, a semiconductor layer on and in direct contact with the nonconductive substrate, an etch stop layer covering a central area of the semiconductor layer peripheral portions of the semiconductor not covered by the etch stop layer, and a photoresist layer on the etch stop layer;
depositing a conductive layer on the photoresist layer, on the nonconductive substrate, and on the semiconductor layer at the portions that are not covered by the etch stop layer;
etching away the photoresist material to remove the conductive material overlying the photoresist material to form a source electrode and a drain electrode from the conductive layer, wherein the source electrode overlaps a first peripheral portion of the semiconductor layer not covered by the etch stop layer, wherein the drain electrode overlaps a second peripheral portion of the semiconductor layer not covered by the etch stop layer, wherein the source electrode and the drain electrode do not overlap the etch stop layer, and wherein each of the source electrode and the drain electrode are in direct contact with the nonconductive substrate; and
depositing a gate electrode on the etch stop layer that is electrically insulated relative to the source electrode, the drain electrode, and the semiconductor layer.