3D Power Amplifier Dice Stacking with Radial Splitters
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Solution Overview
Problem
Conventional power amplifiers struggle to maintain efficiency and compactness as circuitry shrinks, leading to larger footprints and increased losses due to non-superposed splitters and combiners.
Innovation Solution
A compact power amplifier design featuring a stackable assembly of radial power splitters and combiners on glass substrates with surface-mounted power amplifier dice, utilizing orthogonal vias for coupling and thermal conduction to reduce size and loss, allowing for vertical stacking and efficient heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional non-superposed splitters and combiners are used, then the layout is simpler to implement, but the glass substrate size increases and losses increase
Solution Approach 1:
The patent transitions from a planar layout to a three-dimensional superposed configuration where the splitter and combiner are stacked vertically on different planes of the glass substrate. This vertical stacking allows both components to occupy the same horizontal footprint while maintaining electrical isolation through different substrate layers, thereby reducing the overall substrate area while minimizing signal loss through optimized coupling paths.
Solution Approach 2:
The patent merges the splitter and combiner functions into a compact integrated structure where both components are fabricated on the same glass substrate in a superposed arrangement. This integration allows shared use of substrate real estate and coupling structures, reducing the total area required while maintaining low loss through optimized signal paths that eliminate redundant interconnects.
2Area of moving object
If power amplifier dice are arranged in conventional 2D layout, then the manufacturing process is simpler, but the footprint area increases
Solution Approach 1:
The patent arranges power amplifier dice in a three-dimensional configuration where multiple dice are stacked vertically and coupled through orthogonal vias that penetrate the substrate. This vertical stacking enables multiple amplifiers to occupy the same horizontal footprint, dramatically reducing the overall device area while the via-based interconnection provides a systematic approach to managing the increased assembly complexity.
Solution Approach 2:
The patent divides the power amplifier system into discrete, modular dice that can be independently fabricated and then assembled in a stacked configuration. Each die is a separate functional unit that couples to others through standardized via interfaces, allowing the system to achieve compact 3D integration while maintaining manufacturing simplicity through modular assembly processes.
3Area of stationary object
If orthogonal vias are used for coupling, then the 3D stacking is enabled and footprint is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The patent incorporates via structures as integral parts of the substrate fabrication process, forming the vertical interconnects during the substrate manufacturing stage before the power amplifier dice are assembled. This preliminary formation of via structures ensures precise alignment and positioning, eliminating the need for high-precision alignment during subsequent assembly operations and reducing the overall manufacturing precision requirements.
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
This design achieves a smaller footprint and reduced loss by enabling efficient thermal management and electrical coupling, addressing the inefficiencies of conventional power amplifiers with longer leads and larger sizes.
Implementation Method 1
Thermal conduction probes chained through the power platters remove heat from the vicinity of the power amplifier dice
Data Source
AI summary
An article of manufacture provides a compact assembly of power amplifiers in series and in parallel. A plurality of radial power splitters and radial power combiners couple surface mounted power amplifier dice into a power platter. Thermal conduction probes chained through the power platters remove heat from the vicinity of the power amplifier dice. Surface mounted power amplifier dice may be enclosed within a matched pair of power platters. Stackable power platters may be assembled to form a 3D power amplifier pile.