The mold of ultrasonic embossing machine requires the reasonable matching of the full strength and toughness of the matrix in the operation, and its surface performance is also important to the operation performance and service life of the mold. The surface properties of ultrasonic embossing machine refer to wear resistance, corrosion resistance, friction coefficient, fatigue performance, etc. The improvement of these properties solely depends on the improvement and enhancement of the substrate is very limited, but more achievements can often be achieved through surface treatment technology, which is the reason for the rapid development of ultrasonic embossing machine surface treatment technology.

The surface treatment methods of ultrasonic embossing machine can be divided into chemical method, physical method, physical chemical method and mechanical method. New treatment technologies to improve the surface properties of dies are constantly emerging, but nitriding, carburizing, and deposition of hardened films are widely used in die manufacturing. In addition, the surface treatment technology is a system engineering that changes the shape, chemical composition, structure and stress state of the mold surface through surface coating, surface modification or composite treatment technology to obtain the desired surface performance.