Method for manufacturing printed circuit board with optical waveguides

摘要

Disclosed herein is a method for manufacturing a printed circuit board with optical waveguides capable of reducing light loss by forming a bent portion having a changing pattern shape on a core layer and attaching a reflective member thereto to increase reflectivity. The method for manufacturing a printed circuit board with optical waveguides includes; (a) forming a lower clad layer on a base substrate; (b) applying a core material onto the lower clad layer; (c) performing exposure on the core material using a photo mask having a pattern; (d) performing development on the core material subjected to the exposure and forming a bent portion having a changing pattern shape to form a core layer; (e) applying an upper clad layer onto the lower clad layer having the core layer formed thereon; (f) performing exposure and development on the upper clad layer to expose a reflective portion of the machined bent portion to the outside; and (g) attaching a reflective member to the reflective portion exposed to the outside. Therefore, the bent portion having the changing pattern shape is machined to have a curved shape or an oblique shape and the reflective member is attached thereto, thereby making it possible to minimize light loss.