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METHOD FOR FABRICATING SURFACE EMITTING LASER

  • US 20170271839A1
  • Filed: 03/13/2017
  • Published: 09/21/2017
  • Est. Priority Date: 03/15/2016
  • Status: Abandoned Application
First Claim
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1. A method for fabricating a surface emitting laser comprising the steps of:

  • growing a semiconductor laminate on a substrate to form an epitaxial substrate;

    forming a mask on the epitaxial substrate, the mask defining a semiconductor post of the surface emitting laser, the mask having a device area and an accessary area;

    after forming the mask, placing the epitaxial substrate in a chamber of an etching apparatus with an end point detector;

    carrying out etching of the semiconductor laminate with the mask in the chamber of the etching apparatus; and

    stopping the etching of the semiconductor laminate in response to a detection signal from the end point detector in the etching apparatus,wherein the device area includes a plurality of device sections arranged in row and column,each of the device sections has an opening,the device area has an aperture ratio (OPD/SC) having a first value,the aperture ratio (OPD/SC) of the device area being defined as a total area (OPD) of the opening in each device section to an area (SC) of the device section,the accessary area has an opening pattern,the accessary area has an aperture ratio having a second value configured to have substantially the same value as the first value, the aperture ratio of the accessary area being defined as an area of the opening pattern in a portion having an area, which is equal to the area of the device section, in the accessary area.

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