Gallium-nitride-on-handle substrate materials and devices and method of manufacture

A gallium and nitrogen containing device comprising:

• a handle substrate member comprising a first surface region and a second surface region, wherein the second surface region is opposite the first surface region;
• an adhesion layer overlying the second surface region;
• a gallium and nitrogen containing material overlying the adhesion layer, wherein the gallium and nitrogen containing material comprises at least one a core region extending through a thickness of the gallium and nitrogen containing material;
• an interface region overlying the gallium and nitrogen containing material;
• at least one n-type epitaxial growth region overlying the interface region;
• at least one core structure extending from the at least one core region and through a thickness of the at least one n-type epitaxial growth region;
• an active region overlying the at least one n-type epitaxial growth region;
• a p-type region overlying the active region;
• and
• at least one p-contact region overlying the p-type region.