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How to Solve Crushed‑and‑Deformed Copper‑Foil Issues in Thin‑Gauge Flexible‑Copper‑Connection Welding by Polymer Diffusion‑Welders
Sep 07,2026
Thin multi‑layer flexible‑copper‑connections are processed by polymer diffusion‑welding technology. Such copper foils are light‑weight and thin with low overall rigidity and prone to softening under heat. The most frequent defects in production are crushed‑and‑thinned welding zones, end‑face indentation, edge collapse and wrinkle deformation.
I Weaknesses of Thin Copper‑Foil Prone to Deformation
1.Ultra‑thin and loose copper foil lacks rigid support as a whole; irreversible crushing and thinning readily occur under pressure.
2.Copper features high thermal conductivity and softens easily upon heating. Under high‑temperature diffusion‑welding conditions, copper‑foil compression resistance drops sharply; slight pressure may cause crushing deformation.
3.Multi‑layer stacking tends to generate warping, dislocation and local hollowing. Uneven stress during welding leads to local indentation and one‑sided edge collapse.
4.Thin foil heats and cools rapidly with great thermal‑shrinkage stress. Without shaping procedures, wrinkles and bending deformation easily occur after cooling.
II Core Causes of Crushed Copper‑Foil Deformation
1.Excessive welding pressure and violent impact
2.Excessive temperature and over‑long heat‑holding duration
3.Uneven mold surface and uneven stress distribution
4.Non‑standard stacking‑material handling
5.Premature pressure release after welding, shaping failure
III Improvement Solutions against Crushing and Deformation
1.Apply dedicated process parameters for thin‑gauge materials
2.Three‑stage gradient time‑sequence for shape stabilization and anti‑crushing
3.Regular maintenance and calibration of molds
4.Standardize pre‑welding stacking procedures
5.Separate‑management of process parameters for thin‑ and thick‑gauge materials
Wuxi Haifei Intelligent Equipment Co., Ltd. https://www.haifeiwelder.com/
Wuxi Haifei Intelligent Equipment Co., Ltd. has been focusing on the R&D and production of diffusion‑welding equipment for 17 years. The company has passed ISO9001 Quality Management System Certification, China Compulsory Certification (3C) and CE Certification. It is a National High‑tech Enterprise, a Specialized, Refined, Differential and Innovative Enterprise of Jiangsu Province, a Specialized, Refined, Differential and Innovative Enterprise of Wuxi, and a Gazelle Enterprise in the Southern Jiangsu National Self‑Dependent Innovation Demonstration Zone.
Should you be interested in our diffusion‑welding equipment, please contact us: 400‑0510‑750.
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Wuxi HAIFEI Intelligent Equipment Co., Ltd.
Wuxi HAIFEI Welding Equipment Co., Ltd.
Add: 28 Shuiyun Road, Yuecheng, Jiangyin, Jiangsu Province, China. (Postal Code: 214404)
Mobile: +86 18915302352
Email: wushijie@jshaifei.com