Capacitive Touch Panel Electrode Layout for Static-Free Channel Testing
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Solution Overview
Problem
The existing capacitive touch screen panels require additional processes and time for channel open/short tests, which can generate static electricity, increasing tact time and reducing manufacturing yield due to the need for separate antistatic circuits and equipment that may cause static electricity.
Innovation Solution
The touch screen panel design includes extension patterns with sufficient resistance along the edges of the electrode forming part, allowing for rapid channel open/short tests without the need for separate antistatic circuits and reducing the time required for testing by eliminating static electricity and allowing for accurate positioning of test pins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate antistatic circuits are added to prevent static electricity during channel open/short tests, then static electricity damage is prevented, but device complexity and manufacturing time increase
Solution Approach 1:
The patent combines the antistatic function with the existing electrode patterns by adding extension patterns to the first and second electrode patterns. These extension patterns are formed in the same manufacturing process as the electrodes themselves, merging the antistatic protection function into the existing structure without requiring separate antistatic circuits.
Solution Approach 2:
The extension patterns serve multiple functions: they provide antistatic protection during testing, enable accurate positioning of test pins through their extended reach, and maintain electrical connection integrity. This multi-functionality eliminates the need for dedicated antistatic components.
2Productivity
If channel open/short tests are performed using existing electrode patterns, then testing can be conducted, but static electricity is generated and test accuracy is reduced
Solution Approach 1:
The extension patterns are prepared in advance during the electrode formation process, extending beyond the electrode forming part boundaries. This preliminary action ensures that when channel open/short tests are performed, the test pins can accurately contact the extension patterns without generating static electricity, as the extension patterns are specifically designed to facilitate safe testing.
3Ease of manufacture
If routing wires are placed inside the electrode forming part, then connections are made, but test pin positioning is difficult and static electricity occurs
Solution Approach 1:
The extension patterns extend the electrode patterns into a new spatial dimension beyond the electrode forming part boundaries. This dimensional extension provides accessible contact points for test pins outside the constrained electrode forming part area, enabling accurate positioning while maintaining the internal routing wire connections for manufacturing efficiency.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enables quick and accurate channel open/short tests, reducing manufacturing time and increasing productivity by preventing static electricity damage and eliminating the need for additional antistatic circuits, thus enhancing the manufacturing efficiency of capacitive touch screen panels.
Implementation Method 1
extension patterns with sufficient resistance along the edges of the electrode forming part, allowing for rapid channel open/short tests without the need for separate antistatic circuits
Data Source
AI summary
A touch screen panel according to an embodiment includes a substrate; an electrode forming part formed on the substrate, the electrode forming part including a plurality of first electrode serials arranged in parallel in a first direction and a plurality of second electrode serials arranged in parallel in a second direction to cross over the plurality of first electrode serials; a routing wire forming part formed on the substrate outside the electrode forming part, the routing wire forming part including a plurality of first routing wires respectively connected to the plurality of first electrode serials and a plurality of second routing wires respectively connected to the plurality of second electrode serials; and an insulation layer configured to insulate the first electrode serial from the second electrode serial at each of intersections of the first electrode serials and the second electrode serials.