Patent ID: 8053335
Filing Date: 2011-11-08
Classification: H01L

Abstract:
1. A forming method of forming a gallium nitride system compound semiconductor layer, the method comprising: forming a first layer containing silicon oxide on a first substrate of a sapphire or a SiC substrate; partially removing the first layer to form an exposure portion on the first substrate; depositing amorphous gallium nitride system compound semiconductor on the first substrate with the exposure portion; evaporating the semiconductor on the first layer to form cores of the semiconductor on the exposure portion of the first substrate; forming an epitaxial layer of the semiconductor on the first substrate through increase in a size of at least one of the cores, combination of the cores, crystal growth, formation of facets, bending of dislocation lines, transverse crystal growth onto the first layer, collision between adjoining crystal grains, combination of the transversely grown crystals, formation of dislocation networks, and formation of a flat surface of the semiconductor; and removing the epitaxial layer of the semiconductor on the exposure portion on the first substrate to form a separating groove, wherein a portion of the epitaxial layer is selectively transferred using a bonding layer of a predetermined thickness placed on the portion, and the predetermined thickness is approximately in a range from 1.0 micron to 10 microns.