Laser device and semiconductor device having the same

A semiconductor device, includes a permanent substrate having a first boundary and a second boundary; a plurality of columnar bodies on the permanent substrate, and having a first columnar body adjacent to the first boundary and a second columnar body adjacent to the second boundary; a first type semiconductor structure on the plurality of columnar bodies, and having a first surface, a second surface opposite to the first surface and away from the permanent substrate, a first extending portion extending outwardly beyond the first columnar body and a second extending portion extending outwardly beyond the second columnar body; a first electrode on the second surface; and a second electrode on the second surface.