Patent ID: 7899104
Filing Date: 2011-03-01
Classification: H01S

Abstract:
1. An EL semiconductor device comprising: an InP substrate having at least n-type cladding layer, active layer, and p-type cladding layer formed thereon, wherein (i) the n-type cladding layer is a single layer film of which a composition ratio of Mg (ii) the n-type cladding layer is formed of a laminate film containing Mg wherein (iii) the active layer is a single layer film of which a composition ratio of BeZnSeTe in the active layer is above 80% and below 100%, and a lattice parameter (a (iv) the active layer includes at least a first layer and a second layer, in which a composition ratio of BeZnSeTe in the first layer is above 80% and below 100%, a lattice parameter (a (v) the active layer includes at least a first layer and a second layer, in which a composition ratio of BeZnTe in the first layer is above 80% and below 100%, a lattice parameter (a