Semiconductor Degradation Detection Circuit
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Solution Overview
Problem
Semiconductor devices degrade over time, leading to inefficient operation and potential malfunctions, necessitating a method to detect and compensate for this degradation.
Innovation Solution
A semiconductor device with a monitor circuit system comprising a process sensitive circuit, measurement circuit, and calculation circuit that measures parameter values at different times, calculates differential values, and adjusts operating conditions to prevent failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If semiconductor devices are operated continuously over time, then productivity and functionality are maintained, but device degradation occurs leading to reduced reliability
Solution Approach 1:
The patent implements preliminary action by measuring device parameters at multiple predetermined time points during operation. The system proactively monitors degradation trends before failure occurs, allowing early detection and compensation. The control circuit预先 establishes measurement schedules and threshold values to predict when degradation will impact reliability, enabling preventive maintenance or operational adjustments.
Solution Approach 2:
The patent employs feedback mechanisms where measurement results from the measurement circuit are fed back to the control circuit. The control circuit compares measured parameter values against reference values and adjusts operational parameters accordingly. This closed-loop feedback system continuously compensates for degradation, maintaining reliability while allowing continuous operation.
2Reliability
If device parameters are monitored continuously to detect degradation, then reliability is improved, but device complexity and measurement resources increase
Solution Approach 1:
The patent applies segmentation by dividing the monitoring function into distinct modular components: a measurement circuit for parameter acquisition, a control circuit for data processing and comparison, and a reference value storage system. This segmentation allows each component to be optimized independently and simplifies the overall system architecture, reducing complexity while maintaining comprehensive monitoring capability.
Solution Approach 2:
The measurement circuit and control circuit are designed to be multi-functional, capable of measuring and monitoring multiple different device parameters (such as threshold voltage, leakage current, transit time) using the same hardware infrastructure. This universality reduces the need for separate dedicated monitoring circuits for each parameter, thereby reducing overall device complexity while enabling comprehensive reliability monitoring.
Data Source
AI summary
A design structure and method comprising a degradation detection circuit configured to respond to degradation. The degradation detection circuit is located within a semiconductor device and comprises a process sensitive circuit, a measurement circuit, a calculation circuit, and a control circuit. The method comprises subjecting the semiconductor device to a first operating condition. A first value at a first time for a parameter of the process sensitive circuit is measured by the measurement circuit. The semiconductor device is operated to perform an intended function. A second value at a second time for the parameter of the circuit is measured by the measurement circuit. The second time is different from the first time. A first differential value between the first value and the second value is determined by the calculation circuit. The control circuit is configured to receive an enable signal.