Introduction - If you have any usage issues, please Google them yourself
pcb Film Management
Film: The film is exposed in line to do PCB, solder time, PCB surface will be coated with a layer of photosensitive liquid, after test temperature of 80 degrees to dry, and then attached to the PCB board film, and then after UV exposure machine exposure. , tear film. After excess liquid syrup will go, and when to do line-layer welding can be etched into the lines. Pads can be exposed when making solder.