Optical head, optical information storage apparatus, and their fabrication method

Abstract

A method of manufacturing an optical head includes joining of a first substrate on which a plurality of lenses are formed in an array, a second substrate on which a plurality of prisms and mirrors are formed in an array, and a third substrate on which a plurality of detectors and light sources are formed in an array, after positioning of the individual substrates, and cutting the joined substrates along the rows and columns of the array.

1 . A method of manufacturing an optical head, comprising the steps of: 
 joining a first substrate on which a plurality of lenses are formed in an array, a second substrate on which a plurality of prisms and mirrors are formed in an array, and a third substrate on which a plurality of detectors and light sources are formed in an array after positioning the individual substrates; and    cutting the joined substrates along the rows and columns of the array.    
   
   
       2 . The method of manufacturing an optical head according to  claim 1 , wherein said second substrate includes cavities formed therethrough and arranged in an array, wherein said second substrate is positioned such that said light sources can be disposed in said cavities.  
   
   
       3 . The method of manufacturing an optical head according to  claim 1 , wherein said first, said second, and said third substrates are each provided with an alignment mark, and wherein said first, said second, and said third substrates are joined together by aligning said alignment marks with one another.