Patent ID: 7319249
Filing Date: 2008-01-15
Classification: C30B,H01L

Abstract:
1. A light emitting element comprising: a substrate of gallium oxides; and a pn-junction formed on said substrate wherein the pn-junction includes a first GaN system compound semiconductor thin film of a first conductivity type formed on first conductivity type substrate, and a second GaN system compound semiconductor thin film of a second conductivity type opposite to the first conductivity type wherein: said first conductivity type GaN system compound semiconductor thin film includes first conductivity type GaN system compound semiconductor thin film with a first predetermined bandgap energy, and first conductivity type GaN system compound semiconductor thin film with a second predetermined bandgap energy smaller than said first predetermined bandgap energy; and said second conductivity type GaN system compound semiconductor thin film has a third predetermined bandgap energy greater than said second predetermined bandgap energy.