Patent ID: 7406243

Claim:
A method for producing an optical fiber array substrate, comprising the steps of; preparing a base material made of glass or crystallized glass, the base material having a plurality of linear grooves formed in one surface thereof; gripping the base material by a gripping part of feeding means and feeding it into a heating furnace so that the base material is heated to a predetermined temperature; drawing the base material while drawing a lower part of the base material by drawing means to obtain a formed body; cutting the formed body into a predetermined length to provide a longer body having a substantially similar shape to the base material and having a size in a desired range; and cutting the longer body into a desired length, wherein in the step of preparing the base material, a cross sectional shape of each of side surfaces of the base material parallel to the grooves is formed to be a convexly rounded shape, and each of the side surfaces is formed to be a partially cylindrical surface whose center of curvature is located at the center of the base material.