Optical printed circuit board and fabricating method of the same

PURPOSE: An optical printed circuit board and a manufacturing method thereof are provided to improve the accuracy of alignment between an optical connection module and transceiver modules. CONSTITUTION: A printed circuit board(P) includes an internal layer(110,120,130) and a circuit pattern which electrically connects the internal layer. An integrated optical connection module(100) is comprised of an optical transmitter built in the printed circuit board and an optical receiver which is connected with an optical waveguide. An alignment pattern area(X) exposes the part of the integrated optical connection module and is lower than the surface of the printed circuit board.