Circuit-Substrate Environmental Stress Indicators for Damage Logging
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Solution Overview
Problem
Electronic devices face challenges in diagnosing and preventing damage caused by environmental stress, such as extreme temperatures and mechanical forces, as the sources of damage are difficult to pinpoint during manufacturing and operation.
Innovation Solution
Incorporating environmental stress indicators on circuit substrates, such as breakable continuity loops and switchable connectivity structures, to detect and log excessive heat and mechanical stress, providing notifications and data logging to identify and address stress sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If environmental stress indicators are added to detect and log stress events, then reliability is improved, but device complexity increases
Solution Approach 1:
The environmental stress detection system is segmented into multiple independent indicator structures, each designed to detect specific types of stress (thermal, mechanical, humidity). These indicators are distributed across different locations on the substrate, allowing targeted monitoring without requiring a single complex centralized system. Each indicator operates independently and provides specific stress information.
Solution Approach 2:
The patent introduces environmental stress indicators as intermediary elements between the harsh environment and the electronic components. These indicators act as mediators that experience the environmental stress first and provide information about the stress conditions, protecting the main electronic system from direct exposure while enabling indirect monitoring of environmental conditions.
2Measurement precision
If multiple types of environmental stress indicators are implemented to detect different stress sources, then measurement precision is improved, but device complexity increases
Solution Approach 1:
Different regions of the substrate are equipped with specific types of environmental stress indicators tailored to the local stress conditions. For example, areas prone to thermal stress have thermal indicators, while mechanically stressed areas have mechanical indicators. This localized approach ensures precise detection of relevant stress types without implementing all possible indicator types throughout the entire device.
Solution Approach 2:
The patent employs indicators that change their physical or chemical parameters in response to specific environmental stress conditions. Thermal indicators may change resistance or dimensions with temperature, mechanical indicators may change conductivity when bent or cracked, and humidity indicators may change electrical properties with moisture exposure. These parameter changes provide precise measurement of stress conditions through simple, detectable transformations.
Data Source
AI summary
Systems, apparatuses, and methods related to a substrate with one or more environmental stress indicators configured to detect and log environmental stress are described. The environmental stress indicators are configured to change a continuity state when exposed to one or more environmental stresses, such as heat and/or mechanical stress. Thus, the environmental stress indicators provide an indication of the environmental stress experienced by the substrate.