Polysilazane Repair Layer for Flexible Substrate Defects
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Solution Overview
Problem
Flexible substrates often develop defects during manufacture or post-treatment, leading to increased manufacturing costs and reduced process yield, as defective substrates are typically discarded or result in optical defects in electronic devices.
Innovation Solution
A flexible substrate repair structure is developed, featuring a polysilazane compound-based repair layer that is completely filled into regular recesses on the substrate, with a capillary index less than 10−5 to ensure complete filling and an optical adjustment step to match the refractive index of the substrate, preventing delamination and optical defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If a flexible substrate is discarded when defects occur, then manufacturing cost increases, but defect repair complexity is avoided
Solution Approach 1:
Instead of discarding defective flexible substrates, the patent recovers them by filling defects with repair material and restoring functionality, thereby reducing substrate waste while managing repair complexity through systematic material application
Solution Approach 2:
The patent uses composite repair materials comprising inorganic particles dispersed in an organic matrix, creating a multi-phase composite structure that provides both mechanical filling and optical matching properties to resolve the contradiction between repair effectiveness and structural complexity
2Ease of manufacture
If conventional repair material is used, then filling is simple, but delamination and cracking occur due to poor adhesion
Solution Approach 1:
The patent modifies the chemical composition parameters of the repair material by incorporating specific inorganic particles with controlled surface properties, changing the interfacial interaction parameters between repair material and substrate to enhance adhesion while maintaining filling simplicity
Solution Approach 2:
The inorganic particles act as intermediary elements between the flexible substrate and the organic repair matrix, mediating the interface interaction to improve adhesion through physical anchoring and chemical bonding mechanisms
3Ease of manufacture
If repair material with mismatched refractive index is used, then manufacturing is easier, but optical defects occur in electronic devices
Solution Approach 1:
The patent adjusts the refractive index parameter of the repair material by selecting inorganic particles with specific optical properties and controlling their concentration, thereby matching the refractive index to the flexible substrate to eliminate optical defects while maintaining ease of manufacture
Solution Approach 2:
By controlling the refractive index matching through inorganic particle selection, the patent achieves optical transparency of the repair layer, making it visually indistinguishable from the surrounding substrate and eliminating color differences or optical artifacts
4Manufacturing precision
If complete filling of defects is achieved, then repair quality improves, but material precision requirements increase
Solution Approach 1:
The patent utilizes the fluid properties of the organic matrix to enable complete filling of defects through capillary action and pressure-driven infiltration, achieving complete filling without requiring complex material property control by leveraging natural fluid behavior
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
The solution effectively repairs defects, reduces waste, and enhances the adhesion between the substrate and the repair layer, preventing cracking and delamination, while matching the refractive index to minimize color differences and ensure the integrity of electronic devices formed on the substrate.
Implementation Method 1
The capillary index of the repair solution is less than 10−5
Implementation Method 2
A solvent in the repair solution is removed to form at least one repair material layer
Implementation Method 3
An optical adjustment step is performed to change the refractive index of the at least one repair material layer to form at least one repair layer
Data Source
AI summary
A flexible substrate repair structure, a manufacturing method thereof, and an inspection and repair method of a flexible substrate are provided. The flexible substrate repair structure includes a flexible substrate and at least one repair layer. The flexible substrate has a regular recess. The at least one repair layer is located on the flexible substrate and is completely filled in the regular recess. The material of the repair layer includes a polysilazane compound having the unit shown in formula (1) below,wherein Rx, Ry and Rz are respectively hydrogen, a C1 to C10 substituted alkyl group, an unsubstituted alkyl group, an alkenyl group, or an aromatic group.