Patent ID: 8697459
Filing Date: 2014-04-15
Classification: B41J,H01L,H01S

Abstract:
1. A surface emitting laser module comprising: a surface emitting laser element formed in a semiconductor substrate and having a surface emitting laser array configured to emit multiple light beams in a direction perpendicular to a surface of the semiconductor substrate; a package having a bonding surface and a region in which the semiconductor substrate is provided; a plurality of connection terminals disposed at a periphery of the package; a metal ring part disposed on the bonding surface of the package in which the surface emitting laser element is disposed; and a metal cap having a cylindrical part formed of metal, the cylindrical part having a transparent substrate disposed on one side thereof and a bottom part disposed on the other side thereof being bonded to the metal ring part which is disposed on the bonding surface of the package; wherein an outer diagonal of the bottom part is greater than an outer diameter of the cylindrical part, and an outer diagonal of the metal ring part is greater than the outer diagonal of the bottom part, the transparent substrate is provided in the metal cap and disposed to be inclined at a predetermined angle greater than zero with respect to the semiconductor substrate so that portions of the light beams emitted from the surface emitting laser array which reflect from the transparent substrate do not return to the laser emitting laser array, the metal cap is disposed on an upper surface of the metal ring part, and the metal cap and the upper surface of the metal ring part are bonded together by welding, and wherein the package includes at least some of the lead terminals of the package are electrically connected to the surface emitting laser array, and the connection terminals disposed at the periphery of the package are electrically connected to the lead terminals disposed inside the concave part of the package, to connect the surface emitting laser array through multiple channels to signal sources, external to the surface emitting laser module, that control the multiple light beams to be emitted by the surface emitting laser array.