Photoelectric Conversion Panel Wiring Isolation After Substrate Cutting
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Solution Overview
Problem
Existing manufacturing methods for photoelectric conversion panels and X-ray imaging panels face issues with exposed wiring lines, which can lead to static electricity issues, and require additional components like fuses and heaters to block short circuits, increasing the number of components and manufacturing processes.
Innovation Solution
A method involving forming a transistor and photodiode on a substrate, creating a ring-shaped wiring line surrounding the pixel region, cutting the wiring lines after forming a bias line, and using an insulating film to block the short ring and transistor or photodiode from each other, thereby preventing exposure and reducing the number of components and manufacturing steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a short circuit wiring line is formed to connect all electrodes before substrate division, then static electricity can be dispersed during manufacturing, but after substrate division the wiring line is exposed at the outer end surface making the panel susceptible to static electricity
Solution Approach 1:
The patent applies preliminary action by forming the short circuit wiring line that connects all electrodes before the substrate is divided. This ensures that during the manufacturing process, static electricity can be dispersed through the connected electrodes. The wiring line is intentionally designed to extend to the outer end surface of the substrate, and insulating films are formed to cover and protect this exposed portion, preventing future static electricity issues while maintaining the preliminary static protection function.
2Reliability
If a fuse and heater are added to electrically block the short ring from the display circuit unit, then the short ring can be isolated after manufacturing, but the number of components and manufacturing processes increases
Solution Approach 1:
The patent applies the taking out principle by removing the need for additional fuse and heater components. Instead of adding these separate isolation mechanisms, the invention uses the existing short circuit wiring line structure and simply forms insulating films to cover the exposed wiring line at the outer end surface. This achieves the electrical isolation function without increasing device complexity or requiring additional manufacturing processes for fuses and heaters.
Solution Approach 2:
The patent applies self-service by making the short circuit wiring line serve dual purposes: it provides static electricity dispersion during manufacturing when connected, and after substrate division, the exposed portion is covered with insulating films that automatically provide isolation. The structure serves itself by being designed to extend to the outer end surface, where it naturally requires insulation coverage, eliminating the need for separate isolation components.
3Productivity
If the substrate is divided along the cutting line, then individual panels are obtained, but the short circuit wiring line becomes exposed at the outer end surface creating vulnerability
Solution Approach 1:
The patent applies the flexible shells and thin films principle by forming insulating films that cover the exposed short circuit wiring line at the outer end surface of the divided substrate. These thin film insulating layers provide protection against static electricity and electrical isolation without interfering with the substrate division process or the functionality of the wiring line during manufacturing.
Data Source
AI summary
A manufacturing method of a photoelectric conversion panel includes forming a short ring, forming a plurality of data lines connected to a TFT and the short ring, forming a first conductive portion of a bias line connected to the photodiode in an upper layer above the photodiode, electrically blocking the short ring and the TFT from each other by cutting the plurality of data lines after the forming of the first conductive portion, and forming an inorganic insulating film in a blocking portion created by the plurality of data lines being cut.