The wiring density of Round Circuit Board is high, the volume is small, and the weight is light, which is advantageous for miniaturization of electronic equipment. Due to the repeatability and consistency of the graphics, wiring and assembly errors are reduced, saving equipment maintenance, debugging and inspection time, facilitating mechanization and automated production, increasing labor productivity and reducing the cost of electronic equipment. The design can be standardized to facilitate interchange. In particular, the FPC flexible board is resistant to bending, precision, and better to high-precision instruments.
Round Circuit Board benchmark requirements:
a. The preferred shape of the reference point is a solid circle;
b. The size of the reference point is 1.0 +0.05mm in diameter
c. The reference point is placed within the effective PCB range, and the center is more than 6 mm from the edge of the board;
d. In order to ensure the recognition effect of printing and patch, there should be no other silk screen marks, pads, V-grooves, stamp holes, PCB board notches and traces within 2mm near the edge of the reference mark;
e. The reference pad and solder mask are set correctly.