Patent ID: 8338203
Filing Date: 2012-12-25
Classification: B23K,B28D,H01L

Abstract:
1. A method of producing compound semiconductor light-emitting device comprising the steps of: (a) forming by growing a compound semiconductor layer including a light-emitting layer of an n-type or p-type compound semiconductor on a wafer that serves as a substrate having an upper surface, a lower surface and a plurality of side surfaces, (b) arranging a negative electrode and a positive electrode at predetermined positions for flowing a drive current to the light-emitting layer, (c) defining a separation zone for separation into individual light-emitting devices, (d) projecting intermittently a laser beam setting a focal position in the wafer that serves as a substrate to linearly scan along the separation zone so as to form small holes in the separation zone, and (e) dividing the wafer into individual light-emitting devices along the small holes of the separation zone, whereby an array of recessed portions which are periodical in a side direction parallel to the upper and lower surfaces, is formed on each of the substrate side surfaces of the light-emitting device, and wherein the recessed portions are undulating in a side section, wherein an interval of the intermittent-projection of the laser beam for forming the recessed portions is 4 to 40 μm.