Wiring Substrate Shielding Line for Mini LED ESD Protection
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Solution Overview
Problem
The accumulation of electrostatic charge during the manufacturing process of small-size light-emitting diodes, such as Mini LED and Micro LED, leads to electrostatic breakdown between adjacent sub-pads on the wiring substrate, reducing product yield.
Innovation Solution
The incorporation of a shielding signal line with specific portions located between adjacent pad groups, which effectively discharge electrostatic charge, thereby preventing breakdown and improving product yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If small-size light-emitting diodes (Mini LED, Micro LED) are used to achieve smaller display size and higher brightness, then display performance is improved, but electrostatic charge accumulation during manufacturing causes electrostatic breakdown between adjacent sub-pads, reducing product yield
Solution Approach 1:
A shielding signal line is introduced as an intermediary element between adjacent pad groups. This shielding signal line acts as a mediator to discharge electrostatic charge that accumulates during the manufacturing process of small-size light-emitting diodes, preventing electrostatic breakdown between adjacent sub-pads and thereby improving product yield while maintaining the high brightness performance of Mini/Micro LED displays
2Reliability
If the shielding signal line structure is added to discharge electrostatic charge, then product yield is improved, but device complexity increases
Solution Approach 1:
The shielding signal line is designed to perform multiple functions simultaneously: it serves as both a shielding structure to discharge electrostatic charge and as an electrical signal transmission line. By integrating these functions into a single structure, the design avoids adding separate components, thereby improving product yield while minimizing the increase in device complexity
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 shielding signal line enhances the capability to discharge electrostatic charge, reducing the occurrence of electrostatic breakdown and increasing the product yield of the wiring substrate.
Implementation Method 1
The shielding signal line includes second portions which are located between two adjacent pad groups along the second direction, and as a result, the second portions can discharge electrostatic charge accumulated on the sub-pads of the pad groups adjacent to the second portions
Data Source
AI summary
The present disclosure provides a wiring substrate and an electronic apparatus. The wiring substrate includes a substrate and a shielding signal line disposed on the substrate. The substrate includes a functional region; the functional region is provided with a plurality of pad groups; the plurality of pad groups are distributed in an array along a first direction and a second direction respectively, and the second direction intersects with the first direction. The shielding signal line includes a first portion surrounding all pad groups and second portions connected with the first portion, and the second portions are located between two adjacent pad groups along the second direction. The electronic apparatus includes the wiring substrate and an electronic element connected with the pad groups.