Patent ID: 9147770
Filing Date: 2015-09-29
Classification: H01L

Abstract:
1. A thin film transistor structure comprising: a substrate; a polymeric material post on the substrate, the post having a height dimension extending away from the substrate to a top, the post having a first edge and a second edge along the height dimension; an inorganic material cap on the top of the post, the cap covering the top of the post, the cap extending beyond the first edge and the second edge of the post to define a first reentrant profile and a second reentrant profile, respectively; a conformal conductive gate layer over the edge of the post in the first reentrant profile; a conformal insulating layer on the gate layer in the first reentrant profile; a conformal semiconductor layer on the insulating layer in the first reentrant profile; a first electrode located in contact with a first portion of the semiconductor layer over the cap, the first electrode extending to a location adjacent to the second edge; a second electrode located in contact with a second portion of the semiconductor layer over the substrate and not over the post, and adjacent to the first edge such that a distance between the first electrode and second electrode is greater than zero when measured orthogonally to the substrate surface, the first electrode and the second electrode defining a transistor having a channel in the semiconductor layer between the first electrode and the second electrode.