Method of manufacturing circuit board
A method of manufacturing a circuit board is disclosed. A method of manufacturing a circuit board that includes forming a first circuit pattern on the insulation layer of a carrier, in which an insulation layer and a first seed layer are stacked in order; stacking and pressing the carrier and an insulation board with the side of the carrier having the first circuit pattern facing the insulation board; removing the carrier to transfer the first circuit pattern and the insulation layer onto the insulation board; and forming a second circuit pattern on the insulation layer transferred to the insulation board, allows fine pitch circuit patterns to enable the manufacture of fine circuit patterns of high density on the board, and allows the manufacture of a multi-layer circuit board with a simple process.
1. A method of manufacturing a circuit board, the method comprising:
forming a first circuit pattern protruded on one surface of an insulation layer of a carrier on which the insulation layer and a first seed layer are successively stacked;
stacking and pressing one surface of the carrier having the first circuit pattern formed thereon by making the one surface of the carrier face an insulation board such that the first circuit pattern is buried in the insulation board;
removing the carrier to transfer the first circuit pattern and the insulation layer onto the insulation board; and
forming a second circuit pattern on the other surface of the insulation layer transferred to the insulation board.
2. The method of claim 1 , wherein the insulation layer, in the forming of the first circuit pattern, is formed with a thickness of 20 μm to 25 μm in the carrier.
3. The method of claim 1 , wherein the insulation layer, in the forming of the first circuit pattern, is formed by attaching an insulation film on the carrier.
4. The method of claim 1 , wherein the forming of the first circuit pattern comprises:
selectively forming plating resist on the first seed layer to form an intaglio pattern corresponding to the first circuit pattern;
filling conductive material in the intaglio pattern by performing electroplating;
removing the plating resist; and
removing the non-activated first seed layer.
5. The method of claim 1 , wherein the carrier is a metal plate, and
the removing is performed by etching the metal plate.
6. The method of claim 1 , wherein the forming of the second circuit pattern comprises:
forming a second seed layer on the insulation layer;
selectively forming plating resist on the second seed layer to form an intaglio pattern corresponding to the second circuit pattern;
filling conductive material in the intaglio pattern by performing electroplating;
removing the plating resist; and
removing the non-activated second seed layer.
7. The method of claim 1 , wherein the forming of the first circuit pattern comprises:
forming a first circuit pattern on the insulation layer of each of two carriers,
the stacking and pressing comprises:
stacking and pressing the two carriers and an insulation board such that the sides of the carriers having the first circuit patterns formed thereon face either side of the insulation board,
wherein the removing comprises removing the two carriers, and
the forming of the second circuit pattern comprises, forming a second circuit pattern on the other side of each of the insulation layers.
8. The method of claim 7 , further comprising, before the forming of the second circuit pattern on the other side of each of the insulation layers:
forming at least one via hole in the insulation board, and
further comprising, after the forming of the second circuit pattern on the other side of each of the insulation layers:
selectively coating solder resist on the insulation board.