| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a light guide device for suppressing roughening of a core side face of a light guide when forming the light guide on the surface of a substrate. SOLUTION: The method for manufacturing the light guide device includes: forming a photosensitive resin layer 3A for forming a core 3 through formation of an under-clad layer 2 on the surface of the substrate (A) whose surface is smooth in a range of 1-2 nm of an arithmetic average roughness (Ra); then, irradiating the photosensitive resin layer 3A with an irradiation ray L at a right angle to be exposed on a prescribed pattern; forming its exposure part on the core 3; and allowing the irradiation ray L transmitting the photosensitive resin layer 3A for forming the core 3 and the under-clad layer 2 to be reflected at a substantially right angle to the substrate (A) on the smooth surface of the substrate (A) in a process for forming the core 3, thereby significantly reducing random reflection on the surface of the substrate (A) to effectively suppress roughening of the side face of the core 3. COPYRIGHT: (C)2010,JPO&INPIT |
