Roller Train Axial Delimitation for TFT-LCD Substrate Conveying
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Solution Overview
Problem
In the manufacturing process of TFT-LCDs, axial misalignment between rollers in a roller train can cause deformation or crush of substrates during wet-etching, due to the large friction generated by spraying etching agents.
Innovation Solution
A roller train with delimitation parts on each roller axis to prevent axial displacement and misalignment, ensuring that the rollers remain parallel and maintain substrate integrity during conveying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a roller train is used to convey the substrate during wet-etching, then the substrate can be conveyed securely, but axial misalignment between rollers may cause deformation or crush of the substrate
Solution Approach 1:
A positioning structure comprising positioning plates and positioning blocks is introduced as an intermediary mechanism between the rollers and the substrate. The positioning plates are disposed between the upper and lower rollers, with positioning blocks extending from the positioning plates to limit axial displacement of the rollers. This intermediary structure ensures that the rollers remain axially aligned while conveying the substrate, preventing substrate deformation or crush.
2Manufacturing precision
If etching agents are sprayed onto the substrate to form patterns, then electrode patterns can be formed, but large friction occurs between the substrate and rollers hindering conveyance
Solution Approach 1:
The positioning structure acts as an intermediary that decouples the friction force between the rollers and substrate from the conveying motion. By providing axial positioning through the positioning plates and blocks, the structure allows the rollers to maintain proper alignment while reducing the harmful effects of friction during substrate conveyance through the wet-etching process.
Data Source
AI summary
A roller train and a substrate conveying device are provided. The roller train is used for a substrate and includes a first roller including a first delimitation part, and a second roller including a second delimitation part. An axial line of the first roller is parallel to that of the second roller; the first roller and the second roller contact an upper surface and a lower surface of the substrate, respectively; and, the first delimitation part and the second delimitation part are arranged on the first axis and the second axis, respectively, and configured to delimit axial displacement of the first roller and the second roller, respectively. The first delimitation part and the second delimitation part cooperate to prevent misalignment between the first roller and the second roller.