Patent ID: 7968361
Filing Date: 2011-06-28
Classification: H01L

Abstract:
1. A method for producing a GaN based semiconductor light emitting device having at least a buffer layer, an n-type semiconductor layer, a light emitting layer, and a p-type semiconductor layer on a translucent substrate, the method comprising: providing a translucent substrate having formed thereon an uneven pattern composed of a convex shape on an upper surface thereof; wherein a height of the convex shape is 0.1 μm to 2 μm; and forming the buffer layer by a sputtering method, wherein the buffer layer is formed such that a lower surface and an upper surface of the buffer layer assume a shape of the uneven pattern of the upper surface of the translucent substrate, and a pattern of the lower and upper surfaces of the buffer layer is congruent with the uneven pattern of the upper surface of the translucent substrate, and wherein a size of the convex shape satisfies the following relationship: a diameter of a bottom of the convex shape or a length of a diagonal line of the convex shape is less than the height of the convex shape.