Glass-Substrate PCB Edge Protection Against Cracking
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Solution Overview
Problem
Glass substrates used in electronic products are prone to cracking and breakage during processing and transport, leading to potential product defects due to the entry of glass particles through processing equipment or chemicals.
Innovation Solution
A printed circuit board design incorporating a glass substrate with a protection material formed in various damper shapes on its edge surfaces to absorb external impacts and prevent cracking or breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If glass substrates are used in electronic products, then heat dissipation and warpage control are improved, but cracking and breakage occur during processing and transport
Solution Approach 1:
A protection material is applied to the edge surfaces of the glass substrate before processing and transport operations. This protective layer absorbs external impacts and reduces stress concentration at the edges, preventing cracks and breakages during handling while maintaining the glass substrate's heat dissipation properties
Solution Approach 2:
The glass substrate is combined with a protection material to form a composite structure. The protection material complements the glass substrate's thermal properties while providing mechanical protection, creating a hybrid structure that leverages the advantages of both materials
2Ease of manufacture
If glass substrates are processed and transported, then product manufacturing is enabled, but glass particles enter through processing equipment or chemicals causing defects
Solution Approach 1:
The protection material is applied to the glass substrate edges before processing and transport operations. This preliminary protective measure prevents glass particles from generating during subsequent processing steps, eliminating the source of defects before they can occur
Solution Approach 2:
The protection material converts the potentially harmful edge surfaces that generate glass particles into a protective feature. By coating the edges, the structure that would otherwise create defects is transformed into a protective barrier that prevents particle generation
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
Effectively prevents cracking and breakage of glass substrates by absorbing external impacts, improving yield and reducing costs through enhanced bonding and design freedom.
Implementation Method 1
form dampers having various shapes using a protection material on an edge surface of a glass substrate to protect and absorb external impacts
Data Source
AI summary
A printed circuit board including: a plurality of insulating layers; a plurality of wiring layers; a plurality of vias; a glass substrate having an upper surface and a lower surface, a first side surface and a second side surface and a third side surface and a fourth side surface, and at least partially disposed between the plurality of insulating layers; and a protection material covering the first to fourth side surfaces of the glass substrate, and each of the upper surface and the lower surface of the glass substrate may have a peripheral portion connected to the first to fourth side surfaces and a central portion surrounded by the peripheral portion, and the protection material may be spaced apart from central portions of the upper surface and the lower surface of the glass substrate, respectively.