Patent ID: 8431934
Filing Date: 2013-04-30
Classification: H01L

Abstract:
1. An LED chip, comprising: a substrate; a buffer layer formed on the substrate; a light emitting layer formed on the buffer layer, the light emitting layer comprising an n-type semiconductor layer and a p-type semiconductor layer; a first electrode electrically connected with one of the n-type semiconductor layer and the p-type semiconductor layer; a second electrode electrically connected with the other one of the n-type semiconductor layer and the p-type semiconductor layer; a bonding pad formed on a top surface of the first electrode, a bonding wire secured to the bonding pad and configured for electrically connecting the LED chip to an outer electrode, a ratio between a contacting area between the bonding pad and the top surface of the first electrode and an area of the top surface of the first electrode being no less than 6:10; an ohmic contact layer formed on the light emitting layer; a current diffusion layer on the ohmic contact layer; and a transparent electric conduction layer on the current diffusion layer.