Display Substrate Pad Layout for Micro LED Electrostatic Discharge
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Solution Overview
Problem
The transfer process of Micro LED elements to a driving substrate in display substrate preparation leads to electrostatic charge accumulation, causing electrostatic breakdown and damage to the driving substrate or light-emitting elements due to the insulating nature of the materials, which is difficult to repair.
Innovation Solution
A driving substrate design with first and second pads and an electrostatic protection alignment featuring toothed tips is used, allowing electrostatic charge to be concentrated and discharged through aligned toothed tips, preventing accumulation and breakdown during the transfer process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If light-emitting elements are continuously transferred to the driving substrate, then productivity is improved, but electrostatic charge accumulates causing damage
Solution Approach 1:
The patent converts the harmful electrostatic charge accumulation into a beneficial controlled discharge mechanism. By designing toothed tips on pads and electrostatic protection alignments, the accumulated electrostatic charges are concentrated and safely discharged through predetermined paths, transforming the harmful effect into a controlled protective mechanism that prevents damage during continuous transfer operations
2Manufacturing precision
If insulating materials are used for driving substrate and chip substrates, then manufacturing precision is improved, but electrostatic charge cannot escape timely
Solution Approach 1:
The patent applies local quality by creating specific conductive structures (toothed tips on pads and electrostatic protection alignments) at critical locations on the insulating substrate. These localized conductive features provide electrostatic discharge paths only where needed, without compromising the overall insulating properties and manufacturing precision of the substrate materials
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 design effectively neutralizes electrostatic charge, preventing damage to the driving substrate and light-emitting elements by dispersing electrostatic current, ensuring reliable transfer and operation of the Micro LED display.
Implementation Method 1
the first pad includes a first toothed tip arranged on a side of the first pad facing the electrostatic protection alignment, and the electrostatic protection alignment includes a second toothed tip arranged on a side of the electrostatic protection alignment facing the first pad
Data Source
AI summary
Disclosed is a method for preparing a display substrate, including: providing a driving substrate; wherein the driving substrate includes: a base substrate; a pixel driving circuit layer; a first pad and a second pad, spaced from each other, and connected to the pixel driving circuit layer; and an electrostatic protection alignment, spaced from the first pad; and transferring a light-emitting element to the driving substrate, such that an anode of the light-emitting element is connected in alignment with the first pad and a cathode of the light emitting-element is connected in alignment with the second pad. The first pad includes a first toothed tip arranged on a side of the first pad facing the electrostatic protection alignment, and the electrostatic protection alignment includes a second toothed tip arranged on a side of the electrostatic protection alignment facing the first pad.