Double-Sided Electronic Assembly Layout to Limit Substrate Warpage
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Solution Overview
Problem
Electronic assemblies face warpage issues due to the weight and pressure of densely packed components on substrate panels, which can lead to mounting problems, circuit breaks, and impaired electrical performance.
Innovation Solution
The electronic assembly incorporates a substrate with semiconductor dies and power supply modules on opposite surfaces, connected via interconnects, and includes stiffening members to provide structural support and prevent warpage, allowing for high-density and double-sided packaging while maintaining substrate stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a large number of components are densely packed on the substrate panel, then the area utilization is improved, but the substrate panel experiences warpage due to weight and pressure
Solution Approach 1:
The patent transitions from single-sided component mounting to double-sided mounting, utilizing both the front and back surfaces of the substrate panel. Power supply modules are mounted on the second surface opposite to semiconductor dies on the first surface, effectively doubling the component capacity while distributing weight and pressure across both surfaces, thereby reducing warpage
Solution Approach 2:
The patent introduces stiffening members at specific locations on the substrate panel to provide localized structural support. These stiffening members are strategically positioned to counteract the weight and pressure of densely packed components, maintaining substrate flatness in critical areas without requiring increased overall substrate size
2Ease of manufacture
If relatively large empty areas are left between components or a larger substrate panel is used, then component mounting is easier, but substrate warpage is caused
Solution Approach 1:
By utilizing the second surface of the substrate for power supply modules, the patent eliminates the need for large empty areas between components on the first surface. This double-sided approach maximizes space utilization while maintaining substrate flatness through balanced weight distribution
Solution Approach 2:
Stiffening members are strategically positioned to provide localized support in areas where component density is highest, enabling easier component mounting without requiring excessive substrate size or large empty areas, while preventing warpage through targeted structural reinforcement
3Productivity
If substrate warpage occurs, then component assembly is interfered with, but no structural support is provided
Solution Approach 1:
Stiffening members are strategically positioned at specific locations on the substrate panel to provide localized structural support where needed. This targeted approach maintains substrate flatness in critical assembly areas, ensuring component assembly efficiency without requiring uniform reinforcement across the entire substrate
Solution Approach 2:
The double-sided mounting configuration distributes component weight and pressure across both surfaces of the substrate, reducing the overall warpage tendency. This balanced load distribution maintains substrate flatness and facilitates smooth component assembly processes
Data Source
AI summary
An electronic assembly includes a substrate having a first surface and a second surface opposite to the first surface and a plurality of stiffening members coupled to the substrate. The substrate further includes a plurality of substrate interconnects. The electronic assembly further includes a plurality of semiconductor dies mounted on the first surface of the substrate. The plurality of semiconductor dies are electrically connected to each other via the plurality of substrate interconnects. The electronic assembly further includes a plurality of power supply modules mounted on the second surface of the substrate. Each power supply module is disposed opposite to a respective semiconductor die.