Peak Current Evaluation Using Pulse Stress and Resistance Shift
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Solution Overview
Problem
The semiconductor industry faces challenges in forming reliable semiconductor devices at smaller sizes due to increased complexity and difficulty in accurately evaluating electro-magnetic peak current as feature sizes decrease.
Innovation Solution
A peak current evaluation system comprising a pulse tuner, a testing circuit, and a processor that generates and adjusts pulse signals based on predetermined parameters to accurately measure peak current by stressing a testing device and detecting resistance changes, allowing for precise evaluation of peak current in semiconductor devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If feature sizes are decreased to increase functional density, then production efficiency and cost are improved, but manufacturing reliability and measurement accuracy deteriorate
Solution Approach 1:
The patent changes the measurement parameters by using pulse width modulation and duty cycle adjustment to generate stress signals that accurately reflect peak current conditions in scaled-down devices, enabling reliable measurement despite smaller feature sizes
Solution Approach 2:
The patent replaces direct physical measurement methods with an electrical simulation approach, using a testing device that applies stress voltages and measures resistance changes to indirectly determine peak current, which is more suitable for microscopic semiconductor structures
2Productivity
If feature sizes are decreased to increase functional density, then production efficiency and cost are improved, but measurement precision deteriorates
Solution Approach 1:
The patent introduces a testing device as an intermediary between the semiconductor device under test and the measurement system. This testing device contains a testing circuit that applies controlled stress and measures resistance, serving as a mediator that enables accurate peak current measurement without directly probing the microscopic device structures
Solution Approach 2:
The patent substitutes direct electrical measurement with a resistance-based indirect measurement method, where the testing circuit measures resistance changes under stress conditions to calculate peak current, providing better measurement precision for scaled-down devices
3Reliability
If complex fabrication processes are used to maintain reliability at smaller sizes, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent implements self-service by integrating the testing function directly into the fabrication process. The testing device can be implemented on the same semiconductor wafer, allowing devices to test each other during manufacturing, which simplifies the overall process while maintaining reliability
Solution Approach 2:
The patent merges the testing device structure with the semiconductor device structure, using shared components and processes. This integration reduces overall system complexity while ensuring reliable measurement capability is built into the manufacturing process
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
Enables accurate and reliable measurement of peak current, facilitating the fabrication of smaller semiconductor devices by ensuring precise evaluation of electro-magnetic peak current, thus addressing the complexity and reliability issues in advanced IC manufacturing.
Implementation Method 1
supplies the pulse signal to a testing device and measures resistance value of the testing device
Data Source
AI summary
A peak current evaluation apparatus for an IC is provided. The peak current evaluation apparatus includes a pulse tuner and a testing circuit. The pulse tuner receives a clock signal, adjusts pulse width and duty ratio of the clock signal according to at least one predetermined parameter in order to generate a pulse signal with a stress voltage. The testing circuit is coupled to the pulse tuner. The testing circuit, which includes two input ports, receives the pulse signal at one of the two input ports in order to stress a testing device, measures the resistance value of the testing device, and calculates the peak current of the testing device when the resistance value increases and exceeds a threshold value.