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| Device used for liquid crystal display |
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Electrode substrate, process for producing the substrate, liquid crystal device and process for producing the device
| Details |
Inventors: Kamio, Masaru; Tokunaga, Hiroyuki; Tomono, Haruo; Matsuo, Yuji;
Assignee: Canon Kabushiki Kaisha (Tokyo, JP)
Primary Examiner: Sikes; William L.
Assistant Examiner: Nguyen; Tiep H.
Attorney, Agent or Firm: Fitzpatrick, Cella, Harper & Scinto
An electrode substrate is produced through at least the following steps of: forming a plurality of first electrodes on a light-transmissive substrate while leaving a spacing between the first electrodes, filling a resin in the spacing, curing the filled resin, and forming a plurality of second electrodes on the first electrodes and the resin so as to be in contact with the associated first electrodes, respectively. In the electrode substrate, the first electrodes have a thickness h (nm) and an average surface roughness d (nm) and the resin has a curing shrinkage ratio .alpha. (%). The thickness h, the average surface roughness d and the curing shrinkage ratio a satisfies the following relationship: d.gtoreq..alpha..multidot.h/1000. A liquid crystal device is produced by using the electrode substrate satisfying the above relationship, whereby a ripple-shaped shrinkage due to a shrinkage of the resin can be prevented in an effective optical modulation region to minimize a cell gap unevenness and provide a uniform alignment state to liquid crystal molecules, thus suppressing occurrences of an ununiform optical state, crosstalk and an irregularity in drive characteristics to improve display qualities. |
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DETAILED DESCRIPTION An object of the present invention is to provide an electrode substrate free from a ripple-shaped sinkage of a UV curing resin and having a substantially smooth surface with respect to second electrodes in at least an effective optical modulation region and a process for producing the electrode substrate.
Another object of the present invention is to provide an electrode substrate capable of suppressing an irregularity in optical state and an occurrence of crosstalk when used in a liquid crystal device, and a process for producing the electrode substrate.
Another object of the present invention is to provide an electrode substrate capable of preventing a propagation delay of a voltage waveform by providing a good contact state between first electrodes and second electrodes when used in a liquid crystal device, and a process for producing the electrode substrate.
Another object of the present invention is to provide a liquid crystal device capable of being applicable to a device of a large picture area and a high resolution and a process for producing the liquid crystal device.
A further object of the present invention is to provide a liquid crystal device excellent in display qualities and a process for producing the liquid crystal device.
According to the present invention, there is provided an electrode substrate, comprising: a light-transmissive substrate, a plurality of first electrodes disposed with a spacing therebetween on the light-transmissive substrate, a resin filling the spacing, and a plurality of second electrodes disposed so as to be in contact with the associated first electrodes, respectively, wherein the first electrodes have a thickness h (nm) and an average surface roughness d (nm) and the resin has a curing shrinkage ratio .
alpha.
(%), said thickness h, average surface roughness d and curing shrinkage ratio a satisfying the following relationship: d.
gtoreq.
.
alpha.
.
multidot.
h/1000.
In the electrode substrate according to the present invention, the first electrodes may preferably be metal electrodes and the second electrodes may preferably be transparent electrodes, particularly ITO (indium-tin oxide) electrodes
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