EVB Tuning Assembly for Separate Thermal Path Modules
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Solution Overview
Problem
Conventional methods for tuning electronic modules with separate thermal path (STP) designs, such as power amplifier modules, face challenges in accessing circuit components due to their inverted orientation and interposer pieces, making thermal and electrical tuning inefficient and impractical.
Innovation Solution
A module testing assembly is developed, featuring an evaluation board (EVB) with a through-port and baseplate through-port, allowing physical and visual access to circuit components, and including a pedestal heatsink to emulate system-level heatsinking, enabling efficient tuning of STP electronic modules by mimicking the final application environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If STP electronic modules use inverted orientation with interposer pieces, then thermal performance is improved, but accessibility to circuit components for tuning deteriorates
Solution Approach 1:
The module is divided into separate functional layers: the circuit components remain in their optimized inverted STP configuration for thermal performance, while a separate testing assembly with right-side-up module replicas provides accessible interfaces for tuning. This segmentation allows both thermal efficiency and tuning accessibility to coexist.
Solution Approach 2:
Right-side-up module replicas serve as intermediaries between the tuning tools and the actual inverted STP module. These replicas provide accessible circuit component orientations for tuning while the actual module maintains its inverted STP configuration for optimal thermal performance.
2Ease of manufacture
If conventional tuning methods are used on inverted STP modules, then manufacturing simplicity is maintained, but tuning efficiency and practicality deteriorate
Solution Approach 1:
Instead of directly tuning the inverted STP module, right-side-up replicas are created that copy the electrical and thermal characteristics of the original module. These replicas can be tuned using conventional methods, and the tuning parameters are then applied to the actual module, significantly improving tuning efficiency.
Solution Approach 2:
The testing assembly uses right-side-up module replicas instead of directly accessing the inverted STP module. This inversion of the testing approach allows conventional tuning tools and methods to be used effectively, improving tuning productivity without complicating the actual module manufacturing.
3Adaptability or versatility
If sample modules are tuned before final design validation, then design refinement is enabled, but access to circuit components is blocked by encapsulation
Solution Approach 1:
The development process is segmented into two stages: initial tuning using accessible right-side-up replicas, and final validation using the actual encapsulated module. This allows design refinement to occur efficiently before final encapsulation, and enables post-encapsulation tuning through the replica-based testing assembly.
Solution Approach 2:
Tuning is performed preliminarily on right-side-up replicas before final encapsulation decisions are made. This preliminary tuning action allows design refinement to occur when components are still accessible, and the same replica-based approach continues to enable tuning even after encapsulation.
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 approach allows for effective electrical and thermal tuning of STP electronic modules in a cost-efficient manner, closely simulating the real-world operating environment and facilitating the refinement of STP electronic module designs for production.
Implementation Method 1
a testing assembly pedestal heatsink to which the sample module power die is thermally coupled
Data Source
AI summary
Evaluation board (EVB) assemblies or stacks utilized in tuning electronic modules are disclosed, as are methods for tuning such modules. In embodiments, the module testing assembly includes an EVB and an EVB baseplate. The EVB includes, in turn, an EVB through-port extending from a first EVB side to a second, opposing EVB side; and a module mount region on the first EVB side and extending about a periphery of the EVB through-port. The module mount region is shaped and sized to accommodate installation of a sample electronic module provided in a partially-completed, pre-encapsulated state fabricated in accordance with a separate thermal path electronic module design. A baseplate through-port combines with the EVB through-port to form a tuning access tunnel providing physical access to circuit components of the sample electronic module through the EVB baseplate from the second EVB side when the sample electronic module is installed on the module mount region.