Semiconductor laser device, optical pickup using the same, and apparatus and method for manufacturing the same

Abstract

The present invention relates to an optical pickup used for an optical recording information instrument such as CD-ROM, CD-R, MO, DVD and the like, and a semiconductor laser device assembled to be incorporated in the optical pickup, as well as to a method for manufacturing said semiconductor laser device. The present invention also relates to a semiconductor laser element comprising a plurality of semiconductor laser chips, which is incorporated in the semiconductor laser device and to a method for manufacturing said semiconductor laser element, especially to an apparatus for accurately bonding and assembling a semiconductor laser element used in manufacturing said semiconductor laser element, such as a semiconductor laser chip die-bonding machine and the like.

1 - 20 . (Cancelled)  
   
   
       21 . A semiconductor laser device, which is manufactured by die-bonding on a stem a semiconductor laser element with a plurality of semiconductor laser chips die-bonded on one sub-mount, an axis of light emitted from at least one of semiconductor laser chips being consistent with a reference axis which is an axis lying at a prescribed angle relative to a reference surface of the stem.  
   
   
       22 . The semiconductor laser device according to  claim 21 , wherein an emitted light axis of a semiconductor laser chip is consistent with the reference axis, said semiconductor laser chip emitting a light with a shortest wavelength among the plurality of semiconductor laser chips.  
   
   
       23 . A semiconductor laser device, which is manufactured by die-bonding on a stem a semiconductor laser element with a plurality of semiconductor laser chips die-bonded on one sub-mount, an axis lying at an average angle among angles of light emitted axes of the plurality of semiconductor laser chips being consistent with a reference axis which is an axis lying at a prescribed angle relative to a reference surface of the stem.  
   
   
       24 . An optical pickup comprising a semiconductor laser device as defined in any one of  claims 21  to  23  and a condensing lens, wherein a reference surface of the optical pickup disposed at a prescribed angle relative to an optic axis of the condensing lens is consistent with a reference surface of a stem of the semiconductor laser device.