Patent ID: 7807034

Claim:
A manufacturing method of a non-etched circuit board, comprising the steps of: forming a metal barrier layer on a metal substrate; transmitting an electrical current via the metal barrier layer to form an electroplated copper layer on the metal barrier layer; forming a first patterned photoresist layer with a photoresist opening on the electroplated copper layer; transmitting an electrical current via one of the metal barrier layer and the electroplated copper layer to form a circuit layer on the electroplated copper layer within the photoresist opening; removing the first patterned photoresist layer; performing a surface treatment on surfaces of the electroplated copper layer and the circuit layer to increase surface areas of the electroplated copper layer and the circuit layer; hot pressing the metal substrate having the metal barrier layer, the electroplated copper layer and the circuit layer together with a dielectric layer onto a circuit board; removing the metal substrate to expose the metal barrier layer; removing the metal barrier layer to expose the electroplated copper layer; removing a portion of the electroplated copper layer and a portion of the dielectric layer of the circuit board to form a via on the circuit board, so that an internal circuit layer of the circuit board is exposed; forming a chemical copper layer on a wall of the via; transmitting an electrical current via the chemical copper layer and the electroplated copper layer to perform a via-filling plating process; and removing the electroplated copper layer to expose the circuit layer having an untreated surface.