Patent ID: 7781755

Claim:
A light emitting diode by using metal diffusion bonding technology, comprising: a) a conducting permanent substrate formed on a second type of electrode; b) an ohmic contact metal layer formed on the permanent substrate; c) a metal diffusion bonding layer with a thickness less than 5 μm is formed on the ohmic contact metal layer; d) a second ohmic contact metal layer formed on the metal diffusion bonding layer; e) an AlInGaP semiconductor LED epitaxial structure formed on the second ohmic contact metal layer, a rough surface being formed on the top of the first confinement layer of semiconductor LED epitaxial structure; f) an transparent insulating current block layer with special pattern interposed between the second ohmic contact metal layer and the second confinement layer of AlInGaP semiconductor epitaxial structure to maintain the reflectivity and control current flow; and g) a composite electrode that consists of a center bonding pad and a set of ohmic contacts of the first conducting type formed on a partial surface of the first confinement layer of AlInGaP semiconductor epitaxial structure to ensure the current flow path.