Probe Head Layout for Accurate Overdrive Confirmation
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Solution Overview
Problem
Existing electrical connecting devices face challenges in accurately confirming the relationship between the programmed overdrive (POD) and actual overdrive (AOD) applied to probes, leading to inconsistent contact pressure between probes and inspection objects, which affects measurement accuracy.
Innovation Solution
The device employs probes with different tip-end lengths for measurement and confirmation, allowing for the precise determination of AOD by adjusting the overdrive amount (POD) to ensure consistent contact pressure, using shorter confirmation probes to verify the contact with the substrate and store the overdrive amount.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single probe structure is used for both measurement and confirmation, then the device structure is simple, but it is impossible to accurately determine the actual overdrive amount acting on measurement probes
Solution Approach 1:
The probe structure is segmented into two distinct types: measurement probes with longer tip ends for electrical measurement, and confirmation probes with shorter tip ends for verifying contact. This segmentation allows each probe type to perform its specific function independently, enabling accurate determination of actual overdrive amount through confirmation probe contact detection while maintaining clear functional separation.
Solution Approach 2:
Confirmation probes serve as an intermediary mechanism to indirectly determine the actual overdrive amount acting on measurement probes. By monitoring the contact state of confirmation probes (which have known shorter tip lengths), the system can calculate and confirm the overdrive condition of measurement probes without directly measuring it, thus solving the measurement precision problem.
2Reliability
If the overdrive amount is not accurately confirmed, then the device operation is simple, but the contact pressure between probes and inspection object becomes inconsistent, affecting measurement accuracy
Solution Approach 1:
The system implements feedback by detecting the contact state of confirmation probes and using this information to determine the actual overdrive amount. This feedback mechanism ensures that measurement reliability is maintained by continuously verifying that the overdrive pressure is within the appropriate range, allowing the system to adjust or confirm operational parameters based on real-time contact detection.
Solution Approach 2:
The invention utilizes parameter changes in probe tip length (confirmation probes have shorter tips than measurement probes) to create a measurable difference in contact behavior. By controlling and measuring the overdrive amount parameter through the differential contact of probes with different tip lengths, the system ensures consistent contact pressure while maintaining a relatively simple overall device structure.
3Measurement precision
If confirmation probes with shorter tip ends are used, then the actual overdrive amount can be accurately determined, but the probe design becomes more complex
Solution Approach 1:
The probe array is segmented into measurement probes and confirmation probes with distinct tip lengths. This segmentation enables the confirmation probes to make contact at a different stage or under different conditions than measurement probes, providing direct information about the actual overdrive amount. The segmented design achieves high measurement precision while keeping each individual probe type simple in structure.
Data Source
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AI summary
An electrical connecting device includes a probe head (20), and probes for measurement (11) and probes for confirmation (12) held by the probe head (20). The probe head (20) holds the probes for measurement (11) and the probes for confirmation (12) in a state in which the respective tip ends are exposed therefrom. An exposed length from the probe head (20) to the tip end is shorter for the probes for confirmation (12) than for the probes for measurement (11).