Structural Layer for Electronic Device Load Distribution
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Solution Overview
Problem
FR4 glass-reinforced epoxy circuit boards face challenges due to their inhomogeneous mechanical properties, leading to uncertainty in load handling and potential damage from orientation-dependent flaws, which complicates quality control and performance in electronic devices.
Innovation Solution
Incorporating a structural layer with materials like carbon fiber or titanium alloys, which offer higher flexural strength and homogeneity, to serve as a support for the circuit boards, minimizing displacement and ensuring consistent load distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If FR4 glass-reinforced epoxy circuit boards are used, then electrical insulation and structural support are provided, but inhomogeneous mechanical properties lead to uncertainty in load handling and potential damage
Solution Approach 1:
The patent applies composite materials by combining FR4 glass-reinforced epoxy circuit boards with a structural layer made of materials such as aluminum, magnesium, or their alloys. This composite structure integrates the electrical insulation properties of FR4 with the homogeneous mechanical strength and reliability of the structural layer, resolving the contradiction between providing structural support and ensuring reliable load handling.
Solution Approach 2:
The patent segments the device into distinct functional layers: the FR4 circuit board layer for electrical functions and the structural layer for mechanical support. This segmentation allows each layer to optimize its specific function without compromising the other, addressing the mechanical inhomogeneity issue by isolating the structural support function to a dedicated homogeneous layer.
2Ease of manufacture
If FR4 circuit boards are used, then electrical components can be mounted, but orientation-dependent flaws complicate quality control
Solution Approach 1:
The patent introduces a structural layer with homogeneous material properties to replace the inhomogeneous FR4 board for structural functions. This homogeneous layer eliminates orientation-dependent flaws, allowing for more precise quality control and consistent manufacturing standards across different production batches and orientations.
3Strength
If a structural layer with higher flexural strength is incorporated, then load distribution and mechanical integrity are improved, but device complexity increases
Solution Approach 1:
The structural layer serves multiple functions simultaneously: it provides mechanical strength and rigidity, acts as a mounting surface for components, and can serve as a heat dissipation pathway. This multi-functionality reduces the need for additional separate structural components, thereby limiting the increase in device complexity while achieving improved load distribution and mechanical integrity.
Data Source
AI summary
A device can include a structural layer; a first glass-reinforced epoxy circuit board mounted to one side of the structural panel; a second glass-reinforced epoxy circuit board mounted to an opposing side of the structural panel; components where the components include a processor, memory operatively coupled to the processor and a display operatively coupled to the processor; and a housing material supported by the structural layer.