Electro-optical device having a symmetrically located contact hole and method of producing the same
US6657230B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 21, 2000 |
| Grant date | Dec 2, 2003 |
| Priority date | — |
| Expiry date | Jul 21, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D86/60
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electro-optical device such as an active-matrix-driven liquid crystal device is improved to suppress undesirable effects of dents and steps that appear on pixel electrode surfaces due to presence of contact holes that interconnect a semiconductor layer and pixel electrodes through the intermediary of a conductive layer. The liquid crystal device has a TFT array substrate carrying a TFT, data lines, scanning lines, capacitance lines and pixel electrodes. The pixels and TFTs are electrically connected via contact holes through the intermediary of barrier layers. At least each contact hole is formed in a non-aperture region at a position symmetrical with respect to two adjacent data lines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.