Patent ID: 6287884
Filing Date: 2001-09-11
Classification: H01L,H01S,Y02E

Abstract:
A method of fabricating a native oxidized buried heterostructure InP-based device comprising:providing a strip mesa grown on a substrate, the mesa having an InP buffer layer, a lower confining layer, an active layer, and an upper confining layer, the strip mesa being formed by etching out ridge ribs;growing a first p-InP cladding layer along the ridge wherein a height of the p-InP cladding layer is substantially equal to a height of the strip mesa;growing a non-planar Al-bearing layer on top of the p-InP cladding layer wherein a bottom side of the Al-bearing layer along the ridge is slightly lower than a top of the mesa, and which goes over the top of the mesa to create a step around the mesa;growing a second p-InP cladding layer on top of the Al-bearing layer;growing a contact layer on top of the second p-InP cladding layer;creating parallel grooves along the ribs and oxidizing along a lateral side of the Al-bearing layer to form a current blocking layer;depositing a dielectric film over a surface of the grooves;etching out a window on the mesa over the contact layer;depositing a p-metal contact over one of the grooves including the window; anddepositing an n-type contact metal over the n-InP substrate.