Manufacturing method of pcb board surface protection
A technology of a PCB board and a manufacturing method, which is applied in the field of circuit board manufacturing, can solve the problems of limited flatness adhesion, heavy pollution in the production process, and weak circuit board production, and achieves good flatness, strong adhesion, and reduced bias. bit effect
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[0018] The following specific examples further illustrate the present invention.
[0019] The manufacturing method of PCB board surface protection of the present invention comprises the following steps:
[0020] Step 1. Paste photosensitive glue on the surface of the PCB, and after a certain temperature and pressure, stick the photosensitive glue on the surface of the PCB well. The photosensitive adhesive is a photosensitive silicone organic polymer in dry film form with a thickness of 30um. The photosensitive adhesive can be pasted by a roller laminator or a vacuum laminator. When using a roller laminator, set the temperature to 110°C, the pressure to 3kg, and the transmission speed to 0.5m / min; use a vacuum laminator , the temperature is set at 80-110°C.
[0021] Step 2, making a negative, drawing graphics on the negative, the position of the negative corresponding to the position on the PCB that does not need to cover the protective layer is an opaque figure, and the rema...
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