Joining technology of metal and dissimilar materials is attracting attention in various industrial fields. Especially in the automotive industry, the joining of metal and plastics is expected to be a key technology for weight reduction. A new joining technology of metal to plastics has been developed by laser surface pretreatment to metal. The pretreatment is done by a continuous wave (cw) single mode fiber laser. High energy density and high scanning speed are required for making characteristic surface shapes of metal that are suitable for joining. The characteristic shape is not just a simple corrugation, but has tunnel-like shapes, which is called as stitch anchor. In the present work, a laser beam of 10–30 μm in diameter is focused on the work piece. The intensity is more than 10 MW/cm². To make stitch anchor, the laser beam is moved at more than 2 m/s using Galvano-mirrors. It is confirmed that the characteristic surface shape is not only good for metal-plastics joining, but also for metal-metal, metal-rubber, and metal-adhesive-metal joining.

金属和异种材料的连接技术正在各个工业领域引起关注。特别是在汽车工业中，金属和塑料的结合有望成为减轻重量的关键技术。通过对金属进行激光表面预处理，开发了一种新的金属与塑料连接技术。预处理是通过连续波（cw）单模光纤激光器完成的。为了制造适合于接合的金属的特征表面形状，需要高能量密度和高扫描速度。特征形状不仅是简单的波纹，而且具有隧道状的形状，称为针脚锚。在当前的工作中，直径为10–30μm的激光束聚焦在工件上。强度大于10 MW / cm ²。为了固定针脚，使用Galvano反射镜以超过2 m / s的速度移动激光束。可以确定的是，特征表面形状不仅对于金属-塑料接合是有利的，而且对于金属-金属，金属-橡胶和金属-粘合剂-金属的接合也是有利的。