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Why should copper foil, a highly reflective metal, be cut with UV laser?

发布人:莱塞激光 发布时间:2021-06-08 15:59:29

【摘要】

Pure copper/red copper is a highly reflective material and cannot be cut with a CO2 laser beam. Although the optical fiber communication laser cuts copper well, copper is a highly reflective material. Therefore, the long-term effect of the laser on these materials may affect their service life.

纯铜和黄铜属于高反金属材料,对见波长激光的吸收率极低,同时具有良好的导热性能,吸收的热量迅速扩散到加工区周围,影响加工质量。因此,激光切割铜一直是业界应该克服的挑战。

Why should copper foil, a highly reflective metal, be cut with UV laser?(图1)

纯铜/紫铜作为高反材料,基本上不能用CO2激光束进行切割。光纤通信激光切割铜,虽然切割效果好,但由于铜属于高反光材料,因此,激光在这些材料中的长期作用可能会影响其使用寿命,导致后续加工效果差,同时也会增加耗材的使用。

Why should copper foil, a highly reflective metal, be cut with UV laser?(图2)

切割铜箔的难度在于切割边缘没有碳化和毛刺,不会使铜箔变形,实现卷对卷加工模式。采用传统激光切割机,如光纤激光切割机,热影响大,精度低于紫外激光切割机,边缘碳化严重,边缘热影响会使铜箔翘曲变形。紫外激光切割机的加工模式是振动镜扫描,底部是真空吸附,冷光源减少热影响,可以完美切割铜箔。


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