Liquid crystal display device and method for manufacturing the same
US7573538B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2007 |
| Grant date | Aug 11, 2009 |
| Priority date | — |
| Expiry date | Dec 3, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D30/6739
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid crystal display panel 10A of the invention has gate electrodes G of TFTs, scan lines 16, and auxiliary capacitor electrodes 18a, which are coated with a first insulating film 27 composed of a thick insulating layer 25 and thinned insulating layer 26. A part above the auxiliary capacitor electrodes 18a is coated only with the thinned insulating layer 26, and drain electrodes D are extended on the first insulating film 27, which is not thinned, so as to coat the thinned insulating layer 26. On a second insulating film 28 provided between the pixel electrodes 20 and the drain electrodes D, contact holes 30 are formed at portions above the drain electrodes D on the first insulating film 27, which is not thinned, above the auxiliary capacitor electrodes 18a, and via the contact holes 30, the pixels 20 and the drain electrodes D are electrically coupled to each other. By providing such a constitution, a liquid crystal display device and its manufacturing method can be provided, with only a small number of bright point defects, and with an increased capacitance of the auxiliary capacitor electrodes without a reduction in the aperture ratio of each pixel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.