Patent ID: 7429759
Filing Date: 2008-09-30
Classification: H01L

Abstract:
1. An optical semiconductor device comprising: a light reflector comprising two first reflecting surfaces spaced from each other in direction x and two second reflecting surfaces spaced from each other in direction y perpendicular to the direction x; and at least one optical semiconductor chip arranged between the two first reflecting surfaces and also between the two second reflecting surfaces; wherein the optical semiconductor chip comprises a rectangular upper surface and a rectangular lower surface spaced to each other in direction z perpendicular to both of the directions x and y, the optical semiconductor chip further comprising at least one light-emitting side surface extending between the upper surface and the lower surface, wherein the first reflecting surfaces are inclined relative to the direction z at a first inclination angle, so that light emitted from the optical semiconductor chip is reflected in the direction z, and the second reflecting surfaces are inclined relative to the direction z at a second inclination angle smaller than the first inclination angle, wherein the second inclination angle of the second reflecting surfaces is 0°, and the first reflecting surfaces are rectangular, wherein the light-emitting side surface of the optical semiconductor chip faces one of the second reflecting surfaces and is non-parallel to the facing second reflecting surface as viewed parallel to the direction z; wherein the first inclination angle and the second inclination angle are selected such that light emitted from the light-emitting side surface of the optical semiconductor chip and reflected on the facing second reflecting surface is directed toward and reflected upward by one of the first reflecting surfaces.