Integrated Circuit Heating Elements for Thermal Drift Correction
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Solution Overview
Problem
Current methods for testing integrated circuits (ICs) at various temperature points are slow and cumbersome, making them unsuitable for production testing, where quick and accurate temperature testing is necessary to ensure compliance with temperature design characteristics and compensate for temperature drift in voltage references.
Innovation Solution
Incorporating heating elements within the IC itself to rapidly bring the device to operating temperature during testing, allowing for 'on-the-fly' voltage readings as temperature is ramped up, reducing the need for external heaters and enabling quicker data collection for calibration curves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If external heaters are used to heat the IC during testing, then the IC can be brought to operating temperature, but the test equipment itself heats up and test time increases
Solution Approach 1:
The heating function is merged with the IC itself by incorporating heating elements directly into the integrated circuit. This allows the IC to heat itself during testing, eliminating the need for external heating equipment and avoiding the time loss associated with heating and cooling external devices between tests.
Solution Approach 2:
The IC performs the heating function itself through integrated heating elements rather than relying on external equipment. This self-service approach enables rapid temperature cycling during production testing without imposing thermal loads on external test equipment, thereby reducing overall test time.
2Temperature
If external heaters are used to heat the IC during testing, then the IC can be brought to operating temperature, but external heating equipment is required which complicates the testing setup
Solution Approach 1:
The heating functionality is merged into the IC structure itself through integrated heating elements. This eliminates the need for separate external heating equipment, simplifying the test setup while maintaining the capability to bring the IC to operating temperature rapidly.
Solution Approach 2:
The IC contains its own heating elements that enable it to reach operating temperature without external assistance. This self-service capability removes the complexity of external heating equipment from the testing system while preserving temperature control functionality.
3Reliability
If traditional temperature testing methods are used, then temperature compliance can be verified, but the testing process is slow and cumbersome
Solution Approach 1:
The heating and testing functions are merged into a single integrated process where the IC's own heating elements rapidly bring the device to operating temperature during the test cycle. This eliminates the slow external heating and cooling cycles, significantly increasing testing speed while maintaining reliability.
Solution Approach 2:
The IC uses its own integrated heating elements to rapidly achieve operating temperature during testing, eliminating the time-consuming external heating process. This self-service approach maintains accurate temperature compliance verification while dramatically improving testing productivity for production environments.
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 accelerates IC testing, allowing for rapid and accurate temperature validation and calibration, reducing test time and eliminating the need for external heating, which can heat up test equipment, thereby improving production testing efficiency.
Implementation Method 1
Incorporating heating elements within the IC itself to rapidly bring the device to operating temperature during testing
Data Source
AI summary
In one embodiment a heating mechanism is provided with an integrated circuit for testing and calibration purposes. During production testing, heating elements may be activated in order to quickly bring an integrated circuit up to operating temperature for temperature testing or calibration. Once the operating test temperature has been reached, the circuit can be quickly and easily tested to show it is operable within the design temperature range and/or to obtain calibration data to correct for temperature drift. Calibration data may be used to create correction data, which may be stored within the integrated circuit. During normal operation, the correction data may be used to compensate for variations in operation due to temperature.