Abstract: A circuit board with anti-corrosion properties, a method for manufacturing the circuit board, and an electronic device are provided. The circuit board includes a circuit substrate, a first protective layer, and a second protective layer. The circuit substrate includes a base layer and an outer wiring layer formed on the base layer. The circuit substrate further defines a via hole connected to the outer wiring layer. The first protective layer is formed on the outer wiring layer and an inner sidewall of the via hole, and is made of a white oil. The second protective layer is formed on the first protective layer.

Abstract: A circuit board with anti-corrosion properties, a method for manufacturing the circuit board, and an electronic device are provided. The circuit board includes a circuit substrate, a first protective layer, and a second protective layer. The circuit substrate includes a base layer and an outer wiring layer formed on the base layer. The circuit substrate further defines a via hole connected to the outer wiring layer. The first protective layer is formed on the outer wiring layer and an inner sidewall of the via hole, and is made of a white oil. The second protective layer is formed on the first protective layer.

Abstract: A motor rotor plate includes a rotating shaft, a connecting portion coupled to the rotating shaft to drive the rotating shaft to rotate, and a plurality of electrode portions used to wind a coil. The electrode portions are spaced around the connecting portion at a same interval. One end of each electrode portion is coupled to the connecting portion. Another end of each electrode portion extends outward in a radial direction of the connecting portion. A width of each electrode portion gradually increases along the radial direction of the connecting portion to increase an area of the electrode portion, thereby increasing a magnetic flux, so that an electric current of the coil is reduced while maintaining a certain rotation speed to reduce heat generation.