Objective: to compare phosphoric acid etched and laser etched human enamel surfaces and evaluate the possibility of using laser etching as a new technique to take place the conventional acid etching.

The optical system, mechanical system, electrical system and software system are studied in the mold laser etching machine, and the mold laser etching machine is developed with the practical value.

But it has been rarely reported that femtosecond laser etching can improve the efficiency of silicon solar cells, so far.