Patent ID: 6753552
Filing Date: 2004-06-22
Classification: H01L,Y10S

Abstract:
A growth-selective structure of light-emitting diode (LED), comprising:a nonconductive substrate; an oxidation layer comprising a patterned silicon dioxide deposited on the substrate to form a plurality of isolated blocks having a large width greater than 30 &mgr;m and a small width smaller than 5 &mgr;m respectively, the blocks being separated by a gap of 8-12 &mgr;m; a buffer layer of GaN gallium nitride) III-V group deposited on the oxidation layer of the isolated blocks having the smaller width to form a unified body; an n-GaN layer formed on the buffer layer; an active layer of GaN III-V group formed on the n-GaN layer; a p-GaN layer formed on the active layer; an n-ohmic-contact electrode formed in an n-electrode forming section on the n-GaN layer, the n-electrode forming section being formed by etching the p-GaN layer, the active layer, and the n-GaN layer to have the n-GaN layer exposed, then, a Ti/Al metal being deposited on the n-GaN layer for forming the n-ohmic-contact electrode; a p-ohmic-contact electrode made of Ni/AuBe formed on the p-GaN layer, having a thickness of 50-200 Ã¥; and a plurality of soldering pads formed on the p- and n-ohmic-contact electrode, the soldering pad being substantially a stack layer in 3âˆ’1 &mgr;m thick, formed by overlapping 5 metallic layers (Ti/Pt/Al/Ti/Au) together.