Circuit Board Pad Structure for Moisture-Resistant Display Connections
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices are susceptible to corrosion and damage of connection pads due to moisture and foreign substances permeating from the outside, which can compromise the electrical connections and functionality.
Innovation Solution
A display device design that includes a circuit board with a connection pad configuration featuring first, second, and third pads, a cover layer, and a base layer, along with a connection member and cover member, which are arranged to protect the pads from external moisture and foreign substances, using insulating materials and conductive via holes for electrical connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connection pads are exposed for electrical connection, then electrical connectivity is achieved, but corrosion and damage from moisture and foreign substances occurs
Solution Approach 1:
The connection pad structure is segmented into multiple functional layers: a first pad for electrical connection, a cover layer for protection, and a second pad on the opposite side. This segmentation allows each layer to perform its specific function - electrical connectivity, moisture barrier, and additional connection point - thereby resolving the contradiction between exposure for connection and protection from harm.
Solution Approach 2:
The cover layer is nested between the first pad and the third pad, creating a protective enclosure around the electrical connection elements. This nesting structure allows the connection pads to be protected within layers while maintaining electrical functionality, effectively shielding against moisture and foreign substances.
2Object-affected harmful factors
If pads are covered for protection, then corrosion prevention is achieved, but electrical connectivity is compromised
Solution Approach 1:
The cover layer is positioned specifically between the first pad and third pad, providing localized protection where moisture exposure is most critical, while the first and second pads remain accessible for electrical connection. This local quality approach ensures protection is applied precisely where needed without compromising overall electrical functionality.
3Object-affected harmful factors
If multiple protective layers are added, then protection effectiveness is improved, but device complexity increases
Solution Approach 1:
The base layer serves multiple functions: it provides structural support for the circuit board, acts as a barrier layer for moisture protection, and contains the pad structures. By making the base layer multi-functional, the design achieves effective protection without adding unnecessary complexity from separate dedicated components.
Data Source
AI summary
A display device includes a display panel including a display pad and a circuit board including a connection pad including first, second, and third pads, a cover layer, and a base layer, and a connection member between the display panel and the circuit board and electrically connecting the display pad and the connection pad. The first pad is between the connection member and the base layer and is on a first surface of the base layer, the second pad is on a second surface of the base layer, the third pad is spaced apart from the first pad and is on the first surface of the base layer, the cover layer is between the first pad and the third pad and is on the first surface of the base layer, and the first, second, and third pads are electrically connected to each other.