Thin film transistor matrix device
US5483082A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1993 |
| Grant date | Jan 9, 1996 |
| Priority date | — |
| Expiry date | Dec 28, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13452
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A thin film transistor matrix device comprises a transparent insulating substrate, a thin film transistor unit, a picture element unit, a storage capacitance unit, a gate terminal unit, and a drain terminal unit, the storage capacitance unit including a storage capacitance electrode formed on the transparent insulating substrate and formed of a metal layer of the same material as the gate electrode; a dielectric film formed on the storage capacitance electrode and formed of an insulating film common with the gate insulating film and a non-doped semiconductor layer of the same material as the semiconductor active layer; and a counter electrode formed on the dielectric film and formed of a doped semiconductor layer of the same material as the semiconductor contact layer and a metal layer of the same material as the source electrode and the drain electrode, the counter electrode being connected to the picture element electrode through a contact hole opened in a protecting film common with the passivation film. Thus, the fabrication process of the TFT matrix device can be simplified, and lower costs can be realized. Characteristic changes of the storage capacitance can be prevented, an…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.