Patent ID: 9034722
Filing Date: 2015-05-19
Classification: B82Y,H01L,H01S

Abstract:
1. A method for manufacturing a compound semiconductor device comprising: forming a first compound semiconductor layer over a first substrate, the first compound semiconductor layer containing Al forming a second compound semiconductor layer over the first compound semiconductor layer, the second compound semiconductor layer containing Al forming a compound semiconductor laminated structure over the second compound semiconductor layer; forming a groove through the compound semiconductor laminated structure and the second compound semiconductor layer to expose the first compound semiconductor layer; forming a conductive film on the inside of the groove and the compound semiconductor laminated structure; removing the first compound semiconductor layer in an electrolytic solution containing potassium hydroxide; while applying a positive potential to the first compound semiconductor layer through the conductive film, and irradiating the first compound semiconductor layer with light having an energy between the first band gap and the second band gap, separating the first substrate from the compound semiconductor laminated structure.