Semiconductor Package Chokes for RF Mitigation and Self-Test
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Solution Overview
Problem
Electronic devices face challenges in mitigating radio-frequency (RF) interference, which affects sensitive components, and existing solutions for RF mitigation are often costly and space-intensive when implemented outside the package, while self-test procedures require external devices to heat the package, limiting their effectiveness.
Innovation Solution
Incorporating RF mitigation circuitry, such as chokes, within the package to improve RF immunity and enable self-test procedures by selectively coupling them with a current source to raise the package's temperature, allowing for internal testing without additional cost or complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If RF mitigation circuitry is implemented outside the package, then RF interference mitigation is achieved, but cost and space requirements increase
Solution Approach 1:
The patent combines RF mitigation circuitry (chokes) and self-test circuitry within the package substrate itself, merging previously separate functions into a single integrated structure. This eliminates the need for external RF mitigation components, reducing both space requirements and cost while maintaining effective RF interference filtering.
Solution Approach 2:
The chokes integrated into the substrate serve dual purposes: they function as RF mitigation components to filter interference and as heating elements for self-test procedures. This multi-functionality reduces the overall component count and eliminates the need for separate external testing equipment, addressing both the space and cost concerns.
2Object-affected harmful factors
If RF mitigation circuitry is implemented outside the package, then RF interference mitigation is achieved, but implementation cost increases
Solution Approach 1:
The patent combines RF mitigation circuitry (chokes) and self-test circuitry within the package substrate itself, merging previously separate functions into a single integrated structure. This eliminates the need for external RF mitigation components, reducing both space requirements and cost while maintaining effective RF interference filtering.
Solution Approach 2:
The chokes integrated into the substrate serve dual purposes: they function as RF mitigation components to filter interference and as heating elements for self-test procedures. This multi-functionality reduces the overall component count and eliminates the need for separate external testing equipment, addressing both the space and cost concerns.
3Temperature
If external devices are used for self-test procedures, then heating capability is achieved, but device complexity and cost increase
Solution Approach 1:
The chokes integrated into the substrate serve dual purposes: they function as RF mitigation components to filter interference and as heating elements for self-test procedures. This multi-functionality reduces the overall component count and eliminates the need for separate external testing equipment, addressing both the space and cost concerns.
Solution Approach 2:
The package performs self-testing using its own integrated chokes as heating elements, eliminating the need for external testing devices. The system is self-sufficient, using internal components for both RF mitigation and thermal characterization testing, thereby reducing overall system complexity.
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 enhances RF immunity and enables efficient self-testing within the package, reducing costs and space requirements while maintaining effective RF interference mitigation and self-test functionality.
Implementation Method 1
The chokes may be coupled to input/output (I/O) pads on the package to filter RF interference in I/O signals
Implementation Method 2
The chokes may also be used for enabling self-test procedures, such as by selectively coupling the chokes with a current source during a self-test procedure to raise the temperature of the package
Data Source
AI summary
A semiconductor component package includes circuitry that can be used both for mitigating radio-frequency interference of signals in the package and for performing self-test procedures of components in the package. The circuitry includes chokes between the I/O pads of the package and a sensor module in the package to attenuate high-frequency RF interference in the package and protect sensors in the package. Each I/O pad may have a corresponding choke. During a self-test procedure, such as a test of a sensor's temperature coefficient of offset, the chokes can be decoupled from the I/O pads and the sensor module and coupled between a current source and a ground. A current can be supplied to the choke to raise the temperature of the package. The chokes may use high-resistance windings to increase heat generation during the self-test procedure.