RF Signature Analysis for IC Internal Connection Testing
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Solution Overview
Problem
Testing internal connections of electronic circuits, especially integrated circuits, is challenging due to their inaccessible nature, leading to potential false validations or rejections.
Innovation Solution
A method involving the application of a varying signal between the circuit's terminals, capturing radio frequency waves, and comparing the resulting signature to a reference signature to detect defects, using a device with a source, contact elements, and an antenna to verify expected transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional testing methods are used to verify internal connections, then the circuit can be tested for functionality, but the inaccessible nature of internal connections leads to false validations or false rejections
Solution Approach 1:
The patent replaces traditional electrical testing methods with electromagnetic radiation detection. Instead of applying power and measuring electrical responses from internal connections, the method uses a signal generator to emit electromagnetic signals that interact with the circuit's internal structure, and an antenna detects the resulting electromagnetic radiation. This substitution allows non-contact measurement of internal connection integrity, eliminating the accessibility problem while maintaining measurement precision.
Solution Approach 2:
The patent introduces electromagnetic radiation as an intermediary between the tester and the internal connections. The signal generator creates electromagnetic signals that penetrate or interact with the circuit package, and the antenna captures the radiation emitted or reflected by the internal connections. This intermediary enables indirect observation of inaccessible internal structures without requiring physical access to connection points.
2Ease of operation
If the circuit is powered off during testing, then safety and simplicity are improved, but the ability to test active functionality is reduced
Solution Approach 1:
The patent substitutes electrical power-based testing with electromagnetic radiation-based testing. The signal generator emits electromagnetic signals that can interact with the circuit's internal connections and structure even when the circuit is not powered on. The antenna detects the resulting electromagnetic responses, allowing verification of connection integrity without requiring the circuit to be in an active functional state, thus maintaining both simplicity and reliability.
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 allows for reliable detection of defects in internal connections without powering the circuit, enhancing testing accuracy and reliability by analyzing radio frequency signatures.
Implementation Method 1
verifying that radio frequency waves transmitted by the first circuit correspond to an expected transmission
Data Source
AI summary
A method of testing a first circuit, including: a) applying a first signal between two terminals of the first circuit, the first circuit being powered off; and b) verifying that radio frequency waves transmitted by the first circuit correspond to an expected transmission.