(1) Provide mechanical support for the fixing and assembly of various electronic components such as integrated circuits, realize the wiring and electrical connection or electrical insulation between various electronic components such as integrated circuits, and provide the required electrical characteristics.

(2) Provide solder mask graphics for automatic welding, and provide identification characters and graphics for component insertion, inspection, and maintenance.

(3) After electronic equipment adopts printed boards, due to the consistency of similar printed boards, manual wiring errors can be avoided, and electronic components can be automatically inserted or mounted, automatic soldering, and automatic detection, ensuring electronic products The quality of the product improves labor productivity, reduces costs, and facilitates maintenance.

(4) Provide required electrical characteristics, characteristic impedance and electromagnetic compatibility characteristics for circuits in high-speed or high-frequency circuits.

(5) Printed boards with passive components embedded inside provide certain electrical functions, simplify electronic installation procedures, and improve product reliability.

(6) In large-scale and ultra-large-scale electronic packaging components, it provides an effective chip carrier for miniaturized chip packaging of electronic components.