A method, apparatus, and medium for analyzing the service life of internal copper wires of a flexible circuit board

By establishing a flexible circuit board model and fatigue analysis and calculating the fatigue life of copper wire, the problem of difficult prediction of copper wire fatigue failure risk in existing technologies is solved, and the production quality and design guidance of flexible circuit boards are improved.

CN119738293BActive Publication Date: 2025-10-17KUNSHAN Q TECH CO LTD
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Patent Information

Application Number
CN202411724142.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-11-28
Publication Date
2025-10-17
Estimated Expiration
2044-11-28

AI Technical Summary

Technical Problem

Existing technology does not have an effective method to analyze the service life of copper wires inside flexible circuit boards, resulting in unpredictable risks of copper wire fatigue failure, which affects the normal function of electronic equipment.

Method used

By establishing a flexible circuit board model, the tensile strength and elastic modulus of the copper wire are obtained, the stress fatigue curve is determined, and the load is applied under preset constraints. A cyclic working condition is established, and the fatigue life of the copper wire is calculated using fatigue analysis software.

Benefits of technology

Effectively analyze the fatigue life of copper wires inside flexible circuit boards, shorten the time to obtain stress fatigue curves, improve production quality and guide design improvements.

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Abstract

The application discloses a kind of for flexible circuit board internal copper wire service life analysis method, equipment and medium, the method includes: establishing flexible circuit board model, and the tensile strength and elastic modulus of copper wire inside flexible circuit board are acquired;Based on tensile strength and elastic modulus, the stress fatigue curve of copper wire is determined;The stress result of copper wire under the preset constraint condition and preset load is determined by setting the preset constraint condition to flexible circuit board model and exerting preset load;Based on the cycle load type corresponding to the preset load that flexible circuit board receives, the cycle working condition of flexible circuit board is established;Based on stress fatigue curve, stress result and cycle working condition, the fatigue life of copper wire is determined.The method is by fatigue analysis to flexible circuit board internal copper wire under the preset constraint condition and preset load, and the fatigue life of copper wire is determined.
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