Electro-Optical Capacitor Wiring Layout With Integrated Relay Contact
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Solution Overview
Problem
The manufacturing process of electro-optical devices, such as liquid crystal devices, becomes complicated due to the need for separate steps to form trenches and contacts on insulating films, leading to increased complexity and inefficiency.
Innovation Solution
The electro-optical device design includes a pixel electrode, first and second wiring lines, an insulating layer, a capacitor with stacked electrodes, and a relay electrode that is electrically connected through a through hole in the insulating layer, allowing for simplified manufacturing by integrating the formation of the capacitance line and first electrode in the same step.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a trench portion is formed before formation of the first capacitance electrode, then the retention capacitor can be properly connected to the wiring line, but the manufacturing process becomes complicated due to requiring separate steps for trench and contact formation
Solution Approach 1:
The patent combines the trench formation and contact formation into a single integrated structure. The relay electrode is formed to extend from the capacitance electrode through the insulating film to the wiring line, eliminating the need for separate trench and contact formation steps. This merging of functions reduces manufacturing complexity while maintaining proper electrical connectivity.
Solution Approach 2:
The relay electrode serves multiple functions simultaneously: it acts as the capacitance electrode, provides electrical connection through the insulating film, and connects to the wiring line. This multi-functional design eliminates the need for separate specialized structures for each function, simplifying the overall manufacturing process.
2Manufacturing precision
If separate steps are used for trench portion formation and contact formation, then each structure can be optimized independently, but the manufacturing efficiency decreases and process time increases
Solution Approach 1:
The patent merges the trench and contact formation into a single formation step for the relay electrode. This integrated approach maintains manufacturing precision by ensuring proper alignment and connection while significantly improving productivity by reducing the number of manufacturing steps and process time.
3Reliability
If the relay electrode is formed after the capacitor structure, then electrical connectivity is ensured, but the manufacturing process requires additional sequential steps
Solution Approach 1:
The relay electrode is formed as part of the capacitor structure formation process itself, rather than as a subsequent separate step. This preliminary action ensures electrical connectivity is built-in during the primary manufacturing process, eliminating the need for additional sequential steps and reducing overall manufacturing cycle time.
Data Source
AI summary
An electro-optical device includes a pixel electrode disposed in a display area, a first wiring line, a second wiring line, an insulating layer disposed between the first wiring line and the second wiring line, a capacitor disposed in the display area, and including a first electrode, a capacitance insulation film, and a second electrode stacked in this order on the second wiring layer side surface of the insulating layer, with the first electrode being electrically connected to the second wiring line, and a relay electrode disposed outside the display area, and through the insulating layer, contacted with the first wiring line at the insulating layer side surface of the first wiring layer line and the second wiring line at an opposite side surface of the second wiring line with respect to the insulating layer side.