RFID Socket Insertion Counter for Probe Card Wear Tracking
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Solution Overview
Problem
There is no reliable method to track the number of insertions of devices into test sockets or probe cards, leading to wear and failure, which affects product yields as users are unaware of when to clean or replace them.
Innovation Solution
A method and system using RFID or barcode tags to identify and count insertions, generating an indication to replace or clean the probe card or socket when a threshold value is reached, utilizing a processor and non-volatile memory to manage the counting and communication of ID and insertion data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If socket insertion tracking is not implemented, then the system remains simple and inexpensive, but socket wear and failure cannot be monitored, leading to yield loss
Solution Approach 1:
The system implements feedback by reading the RFID tag on each probe card to automatically retrieve and process insertion count data. This feedback mechanism allows the system to monitor socket usage in real-time and trigger alerts when threshold values are reached, enabling proactive maintenance without manual intervention
Solution Approach 2:
An RFID tag is introduced as an intermediary component attached to each probe card. This tag stores insertion count information and communicates with the system controller, serving as a mediator between the physical probe card and the digital tracking system. This intermediary enables automatic identification and data retrieval without complex scanning or manual input mechanisms
2Measurement precision
If manual tracking of insertions is used, then the system remains simple, but accurate counting cannot be achieved, resulting in unknown socket lifespan
Solution Approach 1:
The probe card performs self-identification by presenting its unique ID and stored insertion count data through the RFID tag when approached by the reader. This self-service mechanism eliminates the need for manual tracking or operator intervention, ensuring accurate automated counting while maintaining system simplicity
Solution Approach 2:
The patent replaces manual mechanical tracking methods with an electronic RFID-based system. The RFID reader wirelessly retrieves insertion count data from the tag, substituting manual counting and recording processes with automated electronic measurement, thereby achieving high precision without complex automation infrastructure
3Productivity
If socket replacement is delayed, then component lifespan is maximized, but product yields deteriorate due to worn sockets
Solution Approach 1:
The system performs preliminary action by continuously monitoring insertion counts and comparing them against predefined threshold values. When the threshold is approached, the system generates early warnings and alerts operators to schedule maintenance before actual failure occurs. This proactive approach allows planned socket replacement during non-critical periods, preventing yield loss while maximizing socket utilization
Data Source
AI summary
A method and electronic device for identifying when to replace/clean a probe card or socket are provided. The method includes receiving an ID of the probe card or socket from a tag associated with the probe card or socket before performing an insertion on a test system. For the received ID, there is determined a count of insertions performed on the probe card, and an indication to replace/clean the probe card or socket is generated when the count of insertions equals the threshold value.