Test Structure on Contact Surfaces for Failure Prediction
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Solution Overview
Problem
Existing methods for monitoring contact structures in electronic assemblies are either complex, require significant technical effort, or disrupt the assembly's operation, making it difficult to reliably predict and prevent failures, especially in safety-critical applications.
Innovation Solution
An electronic component with contact structures and a test structure that is electrically independent of the useful circuit, allowing for the integration of a monitoring circuit to detect impending failures without affecting the assembly's functionality, where the test structure is designed to fail before the contact structures, providing a reliable indication for maintenance or replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If test structures are integrated into the electronic assembly to monitor contact structure failures, then reliability of failure prediction is improved, but device complexity increases due to additional monitoring circuits and test structures
Solution Approach 1:
The patent divides the contact structures into two distinct segments: functional contact structures that perform the primary electrical connection, and test contact structures that are specifically designed for monitoring purposes. This segmentation allows the monitoring function to be separated from the functional connections, enabling reliable failure prediction without compromising the primary function while managing complexity through clear functional separation.
Solution Approach 2:
The patent introduces test contact structures as intermediary elements that serve as mediators between the functional contact structures and the monitoring circuit. These test structures are deliberately designed with lower durability to fail first, acting as sacrificial indicators that provide advance warning of potential failures in the functional contact structures without affecting their operation.
2Reliability
If test structures are made more durable to ensure long-term monitoring, then reliability of monitoring is improved, but the ability to detect impending failures before contact structures decreases
Solution Approach 1:
The patent deliberately changes the durability parameter of the test contact structures, making them less durable than the functional contact structures. This parameter change ensures that the test structures fail first under stress, providing an early warning signal. The controlled reduction in durability of test structures creates a time buffer for detecting and responding to potential failures before they affect the functional contact structures.
3Loss of time
If monitoring circuits continuously monitor contact structures during operation, then early failure detection is improved, but the assembly's operation is disrupted
Solution Approach 1:
The patent creates simplified copies of the contact structures in the form of test contact structures that replicate the electrical connection function but are designed to fail first. These test copies allow the monitoring circuit to detect potential failures without needing to continuously monitor the actual functional contact structures, thus enabling early failure detection while maintaining uninterrupted operation of the primary electrical connections.
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 reliable and efficient monitoring of contact structures with minimal technical effort, allowing for proactive maintenance and preventing electrical failures in safety-critical applications by ensuring the test structure fails before the contact structures, thus ensuring the assembly's continued functionality.
Implementation Method 1
The electrical variable is evaluated with an evaluation unit with regard to a functional reliability of the electrical contacting. The electrical variable is, for example, the electrical resistance of the test structure.
Data Source
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AI summary
The invention relates to a component (11) that provides contact surfaces for a test structure (16a). After assembly, an electronic assembly (22) is formed with a substrate (17) and the component (11). This assembly is provided with the test structure (16a), which, for example, makes an impending failure of the component (11) measurable by means of crack formation (24). According to the invention, the test structure (16a) is provided on the same contact surfaces (13) of the component as are used for contact structures (12) for contacting a utility circuit (28) implemented by the component (11). This ensures that the comparability of the values determined by the test structure (16a) closely mirrors the conditions for the contact structures (12).If the test structure (16a) is provided at a location of the electronic assembly that is subject to the highest stress, a failure of the test structure advantageously occurs reliably long enough before the failure of the contact structures (12). The invention also relates to a method for monitoring the electronic assembly (22).