Liquid Crystal Wiring Static Dissipation
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Solution Overview
Problem
Existing electro-optical devices, such as active drive type liquid crystal devices, face electrostatic damage during manufacturing due to static electricity accumulation in transistors and wiring lines, as the power supply wiring lines are not adequately connected to dissipate static charges effectively.
Innovation Solution
The integration of redundant power supply wiring lines via electrical conductors and wiring lines, with insulating films and contact holes, ensures that static electricity is dispersed, reducing the risk of electrostatic damage by providing paths for charge dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If power supply wiring lines are connected using a common wiring line on a layer above the transistor layer, then the wiring structure is simplified, but static electricity cannot be effectively dissipated during patterning causing electrostatic damage
Solution Approach 1:
The patent applies preliminary action by connecting the first and second power supply wiring lines to a common power supply wiring line in advance, before the patterning process generates static electricity. This pre-established connection ensures that when static electricity is generated during subsequent patterning operations, it can be immediately dissipated through the already-formed common wiring path, preventing electrostatic damage to transistors and wiring lines.
Solution Approach 2:
The patent uses the common power supply wiring line as an intermediary element that mediates between the first and second power supply wiring lines. This intermediary common wiring line serves as a dedicated static electricity dissipation path, allowing charges to be safely redirected away from sensitive components during the patterning process, thus resolving the conflict between wiring simplicity and electrostatic protection.
2Reliability
If redundant power supply wiring lines are connected via electrical conductors and wiring lines, then static electricity dissipation paths are provided, but the device structure becomes more complex
Solution Approach 1:
The patent applies universality by designing the common power supply wiring line to serve multiple functions: it acts as both a power supply connection for both the first and second power supply wiring lines, and simultaneously serves as a static electricity dissipation path. This multi-functional design provides electrostatic protection without requiring entirely separate protection structures, thereby limiting the increase in device complexity.
Solution Approach 2:
The patent merges the power supply function and the static electricity dissipation function into a single common power supply wiring line structure. By combining these functions, the patent achieves electrostatic protection while avoiding the need for completely separate protection wiring, thus reducing the overall complexity increase that would result from entirely independent protection structures.
Data Source
AI summary
A liquid crystal device includes a scanning line driving circuit, a data line driving circuit, a first VDD power supply wiring line that supplies power to the data line driving circuit, a second VDD power supply wiring line that supplies power to the scanning line driving circuit, and a common wiring line that electrically connects the first VDD power supply wiring line and the second VDD power supply wiring line to each other in an integrated manner. The common wiring line includes electrical conductors, a wiring line, and contact holes.