¿Qué es el pre-tratamiento antes del proceso de capa interior?

What Is Pre-treatment Before Inner Layer Process?

After cropping process to have PCB material ready as working size, the first step we will scrub the surface of material to clear contamination and conduct micro-etching to enhance the adhesion with dry film in the next process of PCB material surface. And to plus curing to dry material, all three minor processes are so-called pre-treatment.