(1) Provide mechanical support for fixing and assembling various electronic components such as integrated circuits, realize wiring and electrical connection or electrical insulation between various electronic components such as integrated circuits, and provide 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 the electronic equipment adopts printed boards, due to the consistency of similar printed boards, manual wiring errors are avoided, and automatic insertion or mounting of electronic components, automatic soldering, and automatic detection can be realized, which ensures electronic products. quality, improve labor productivity, reduce costs, and facilitate maintenance.

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

(5) The printed board with passive components embedded inside provides certain electrical functions, simplifies the electronic installation procedure, and improves the reliability of the product.

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