Active plate
First Claim
Patent Images
1. An active plate, comprising:
- a substrate;
a first metallisation layer defining gate electrodes and further defining first storage capacitor electrodes extending longitudinally across the substrate;
a second metallisation layer defining source and drain electrodes and second storage capacitor electrodes;
a semiconductor body layer forming thin film transistor bodies between the source and drain electrodes; and
an insulation layer between first and second storage capacitor electrodes, wherein the drain electrode extends across the width of the gate electrode, and the second storage capacitor electrode overlaps the lateral edges of the first storage capacitor electrode.
1 Assignment
0 Petitions
Accused Products
Abstract
The storage capacitor of an active matrix liquid crystal display is formed to have a second electrode (28) that laterally overlaps a first electrode (10). The drain (30) of a thin film transistor extends across the gate electrode (2). The gate electrode (2) and the first electrode (10) of the storage capacitor are formed from a single metallization layer. The width of the gate electrode (2) and the first electrode (10) will tend to vary in parallel, as a result of process variation. This parallel variation tends to cancel out subsequent variation in the kick back voltage.
-
Citations
10 Claims
-
1. An active plate, comprising:
-
a substrate;
a first metallisation layer defining gate electrodes and further defining first storage capacitor electrodes extending longitudinally across the substrate;
a second metallisation layer defining source and drain electrodes and second storage capacitor electrodes;
a semiconductor body layer forming thin film transistor bodies between the source and drain electrodes; and
an insulation layer between first and second storage capacitor electrodes, wherein the drain electrode extends across the width of the gate electrode, and the second storage capacitor electrode overlaps the lateral edges of the first storage capacitor electrode. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A liquid crystal display comprising an active plate, a passive plate and liquid crystal between the active and passive plates, the active plate comprising a substrate;
-
a first metallisation layer defining gate electrodes and further defining first storage capacitor electrodes extending longitudinally across the substrate;
a second metallisation layer defining source and drain electrodes and second storage capacitor electrodes;
a semiconductor body layer forming thin film transistor bodies between the source and drain electrodes; and
an insulation layer between first and second storage capacitor electrodes, wherein the drain electrode extends across the width of the gate electrode, and the second storage capacitor electrode overlaps the lateral edges of the first storage capacitor electrode.
-
-
8. A method of manufacture of an active plate, comprising the steps of:
-
depositing and patterning using a lower definition patterning process a first metallisation layer on a substrate, the first metallisation layer defining gate electrodes and first storage capacitor electrodes extending longitudinally across the substrate;
depositing an insulation layer;
depositing and patterning using a lower definition patterning process a semiconductor body layer forming thin film transistor bodies; and
depositing and patterning using a higher definition process a second metallisation layer defining source and drain electrodes and second storage capacitor electrodes, wherein the second storage capacitor electrodes overlap the lateral edges of the first storage capacitor electrode. - View Dependent Claims (9, 10)
-
Specification