Probe Head Conductive Guide Filtering Power Ground Signals
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Solution Overview
Problem
Existing probe heads face challenges in achieving optimal filtering performance for power supply and ground signals, leading to interference noise that limits frequency performance, due to the placement of filtering capacitors which compromises their effectiveness when trying to be close to the contact probes.
Innovation Solution
The probe head incorporates conductive portions on the support structure that house the contact probes for power supply and ground signals, with filtering capacitors connected to these conductive portions to minimize interference, allowing for improved signal filtering and reduced noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If filtering capacitors are placed close to contact probes to improve filtering performance, then frequency performance is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent merges the filtering capacitor directly into the guide structure by making the guide itself conductive. The guide holes are formed through a conductive layer that serves dual purposes: providing mechanical guidance for the contact probes and serving as the filtering electrode. This integration eliminates the need for separate capacitor components and their associated mounting structures, thereby improving filtering performance without significantly increasing device complexity.
2Reliability
If filtering capacitors are added to reduce noise, then frequency performance is improved, but manufacturing precision requirements increase
Solution Approach 1:
By integrating the filtering function directly into the guide structure, the patent eliminates the need for separate capacitor placement. The conductive guide holes are formed as an integral part of the probe head structure, ensuring precise positioning relative to the contact probes without requiring additional manufacturing steps for capacitor mounting. This approach maintains signal quality while reducing manufacturing precision requirements.
3Reliability
If more filtering capacitors are distributed in the probe head, then frequency performance is improved, but device complexity increases
Solution Approach 1:
The patent achieves enhanced filtering capability by making the guide structure itself conductive, allowing multiple guide holes to function as distributed filtering elements. Instead of adding separate capacitors for each probe, the conductive material forming the guide holes provides filtering action throughout the probe head structure. This approach improves frequency performance while avoiding the complexity of managing multiple discrete capacitor components.
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 configuration enhances the filtering capabilities, significantly improving frequency performance by reducing impedance and allowing for a higher number of capacitors to be distributed effectively, thereby doubling the frequency performance compared to traditional solutions.
Implementation Method 1
at least one filtering capacitor having at least one capacitor plate being electrically connected to the conductive portion
Implementation Method 2
a conductive portion realized on the support and including a plurality of the guide holes housing the contact probes of the first group, and at least one filtering capacitor having at least one capacitor plate being electrically connected to the conductive portion
Data Source
AI summary
A probe head comprises a plate-shaped support including respective pluralities of guide holes, a plurality of contact probes being slidingly housed in the respective pluralities of guide holes and including at least a first group of contact probes being apt to carry only one type of signal chosen between ground and power supply signals, a conductive portion realized on the support and including a plurality of the guide holes housing the contact probes of the first group, and at least one filtering capacitor having at least one capacitor plate being electrically connected to the conductive portion, the conductive portion electrically connecting the contact probes of the first group.