Novel PCB (printed circuit board)

The utility model discloses a novel PCB (printed circuit board), including PCB board main part, PCB board main part both sides surface is provided with recess and electronic component respectively, recess one side extends to PCB board main part inner chamber, be provided with the fin in the recess, fin bottom and recess diapire fixed connection, the recess both sides all are provided with the vent, vent one end runs through a recess lateral wall, and extends to PCB board main part outer wall one side, PCB board main part corner sets has the anti -friction limit. The utility model discloses a fin that fish scale shape set up is favorable to improving and the indirect area of contact of PCB board main part, utilizes the setting of the great area of fin moreover, can absorb more heats to theimprovement, has been avoided producing the influence of wiping flower and scratch to PCB board main part in the production process, thereby has been reached this practical purpose through the anti -friction limit of radius f