DUT Temperature Control Switching for Rapid Self-Heating Tests
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Solution Overview
Problem
In electronic component testing, devices under test (DUTs) that rapidly self-heat experience significant temperature deviations from desired settings due to real-time temperature control based on signal feedback, leading to ineffective temperature control.
Innovation Solution
An electronic component handling device with a temperature adjuster, calculator, and controller that employs dual temperature control methods: initial control based on calculated DUT temperature and secondary control involving forced cooling or heating, triggered by a predetermined signal after a set time, to manage rapid temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If real-time temperature control based on DUT temperature signal feedback is used, then temperature control responsiveness is improved, but temperature control accuracy deteriorates due to rapid self-heating causing large deviations from set value
Solution Approach 1:
The system performs preliminary action by detecting the start of rapid self-heating through the receiver receiving a first signal, and preemptively switching to the second temperature control method before the temperature deviation becomes severe. This anticipatory switching prevents the temperature from deviating too far from the set value, thereby maintaining temperature control accuracy while preserving the responsiveness benefit of real-time feedback control.
2Device complexity
If single temperature control method based on real-time feedback is used, then control simplicity is maintained, but temperature control effectiveness deteriorates for rapidly self-heating DUTs
Solution Approach 1:
The system applies dynamics by making the temperature control method adjustable and switchable based on DUT conditions. The controller dynamically selects between the first temperature control method (real-time feedback) and the second temperature control method (alternative approach) depending on whether rapid self-heating is detected. This dynamic adaptation maintains reliability for rapidly self-heating DUTs while preserving simplicity for normal operating conditions.
3Measurement precision
If temperature control switching is implemented for rapid self-heating detection, then temperature control accuracy is improved, but device complexity increases due to multiple control methods and switching logic
Solution Approach 1:
The system uses feedback by incorporating a receiver that monitors for the first signal indicating rapid self-heating. This feedback mechanism triggers the controller to switch between temperature control methods. The feedback-based switching automates the selection process, reducing the need for complex manual control logic while maintaining high temperature control accuracy through appropriate method selection.
Data Source
AI summary
An electronic component handling apparatus, for handling a DUT having a temperature detection circuit and pressing the DUT against a socket electrically connected to a tester testing the DUT, includes: a temperature adjuster adjusting a temperature of the DUT; a first calculator calculating the temperature of the DUT based on a detection result of the temperature detection circuit; a temperature controller controlling the temperature adjuster; and a first receiver receiving a first signal output from the tester, a temperature control including a first temperature control based on the temperature of the DUT calculated by the first calculator and a second temperature control, and the temperature controller switching the temperature control of the DUT from the first temperature control to the second temperature control when the first receiver receives the first signal after the temperature controller starts the first temperature control.