Stacked PCB Capacitor Array for Compact High-Power VRMs
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Solution Overview
Problem
Existing Voltage Regulator Modules (VRMs) face challenges in providing high power and low voltage outputs within a small footprint due to the difficulty in incorporating substantial capacitance, which is typically required for conditioning the output DC voltage, and this issue is exacerbated by the large footprint of prior capacitor arrays.
Innovation Solution
A stacked Printed Circuit Board (PCB) electronic component array structure is implemented, where a plurality of electronic components are positioned between two PCBs and electrically coupled to both using solder connections and ball grid arrays, allowing for efficient integration of capacitors and other components in a compact form factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If prior capacitor arrays are used to provide substantial capacitance for VRM output conditioning, then the capacitance requirement is met, but the footprint size becomes too large
Solution Approach 1:
The patent transitions from a planar two-dimensional layout to a three-dimensional stacked configuration. Multiple PCB layers are stacked vertically with capacitors positioned between layers, connected via vias and solder balls. This vertical stacking enables substantial capacitance to be achieved within a compact footprint by utilizing the third dimension (height/depth) rather than expanding horizontally.
Solution Approach 2:
The patent implements a nested structure where capacitors are positioned between stacked PCB layers, with connection elements (solder balls, vias) nested within the PCB structure. The capacitors are effectively nested within the vertical space between PCB layers, allowing dense integration of capacitance without increasing the horizontal footprint.
2Power
If more capacitors are added to increase capacitance for high power VRM operation, then the power conditioning capability is improved, but the device complexity increases
Solution Approach 1:
The stacked PCB structure serves multiple functions simultaneously: it provides mechanical support for capacitors, establishes electrical connections through vias and solder balls, enables thermal management pathways, and achieves compact form factor. This multi-functional integration reduces overall device complexity compared to separate components for each function.
Solution Approach 2:
The patent merges the capacitor mounting structure, connection structure, and support structure into a single integrated stacked PCB assembly. Multiple capacitors are arranged in arrays between PCB layers and connected through shared via structures, combining what would traditionally be separate mounting brackets, connection elements, and support structures into one unified architecture.
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 solution enables VRMs to produce high power and low voltage outputs efficiently while maintaining a small footprint, effectively addressing the space constraints and capacitance requirements of modern electronics.
Implementation Method 1
The plurality of electronic components are electrically coupled to the first PCB by way of a first solder connections. The plurality of electronic components are electrically coupled to the second PCB by way of second solder connections.
Data Source
AI summary
A structure with an electronic component array positioned between two stacked printed circuit boards is disclosed. The electronic components of the array can be connected to the printed circuit board by way of solder connections. Example electronic components include capacitors. Related methods of manufacture are disclosed that involve applying heat to a solder paste array on a printed circuit board to form solid conductors electrically connected to the electronic components.