Method for manufacturing multilayered flexible circuit board
Disclosed herein is a method of manufacturing a multilayered flexible circuit board. The method of manufacturing a multilayered flexible circuit board may include integrally forming a first flexible printed circuit board and a second flexible printed circuit board divided in a symmetrical shape with respect to a reference line on the same plane to provide an original plate; attaching the first flexible printed circuit board to the second flexible printed circuit board by folding the original plate with respect to the reference line; and electrically connecting the first flexible printed circuit board to the second flexible printed circuit board.
1. A portable terminal, comprising:
a first body;
a second body configured to move with respect to the first body to be foldably connected thereto; and
a flexible printed circuit board configured to electrically connect the first body and the second body,
wherein the flexible printed circuit board comprises:
a first flexible printed circuit board in which a first circuit pattern is formed on one surface thereof and a second circuit pattern is formed on the other surface thereof;
a second flexible printed circuit board layered on the first flexible printed circuit board, in which a third circuit pattern is formed on one surface thereof and a fourth circuit pattern is formed on the other surface thereof;
a folding portion formed at either one end portion of a layered body of the first flexible printed circuit board and second flexible printed circuit board to connect the first flexible printed circuit board and the second flexible printed circuit board in a folding shape; and
an adhesive layer coated between the first flexible printed circuit board and the second flexible printed circuit board,
wherein an attached region for attaching a connector is formed on at least one of the first and second flexible printed circuit boards, and is located nearby the folding portion,
wherein a first conductive via hole or through hole is formed on the first flexible printed circuit board and a second conductive via hole or through hole is formed on the second flexible printed circuit board, and each of the first and second conductive via holes or through holes is touched by each other to form an electrically conductive connection, and
wherein the adhesive layer is excluded from a surrounding of the first and second conductive via holes or through holes in the respective first and second flexible printed circuit boards to electrically connect the first flexible printed circuit board to the second flexible printed circuit board.
2. The portable terminal of claim 1 , wherein each of the first and second conductive via holes or through holes is formed at a corresponding position of the first and the second flexible printed circuit board, respectively, to pass through the layered body.
3. The portable terminal of claim 1 , wherein the first flexible printed circuit board is folded to cover part of the second flexible printed circuit board.
4. The portable terminal of claim 3 , further comprising an electrical element mounted on a portion of the second flexible printed circuit board and being covered by the first flexible printed circuit board.
5. The portable terminal of claim 1 , wherein the first flexible printed circuit board and the second flexible printed circuit board are formed to be symmetrical to each other with respect to the folding portion.
6. The portable terminal of claim 1 , further comprising:
an external insulating layer attached to an outer surface of the first flexible printed circuit board and an outer surface of the second flexible printed circuit board.