Patent ID: 8664028
Filing Date: 2014-03-04
Classification: H01L

Abstract:
1. A semiconductor device production process comprising: (a) forming on a growth substrate a void-containing layer that is made of a group III nitride compound semiconductor and contains voids, (b) forming on the void-containing layer an n-type layer that is made of an n-type group III nitride compound semiconductor and serves to close the voids, (c) forming on the n-type layer an active layer made of a group III nitride compound semiconductor, (d) forming on the active layer a p-type layer made of a p-type group III nitride compound semiconductor, (e) bonding a support substrate above the p-type layer, and (f) peeling off the growth substrate at a position in an area where the voids are produced; wherein said (a) forming the void-containing layer comprises a first growth step in which the group III nitride compound semiconductor grows under conditions such that vertical growth is mainly promoted, a second growth step in which the group III nitride compound semiconductor grows under conditions such that horizontal growth is mainly promoted, and a repeating step in which steps that are the same as the first growth step and the second growth step, respectively, are alternately repeated; and wherein said (a) forming the void-containing layer or said (b) forming the n-type layer comprises a desorption acceleration step in which a supply rate of a group III material is decreased to less than that in the first growth step and the second growth step, under conditions where the desorption of the group III nitride compound semiconductor proceeds more actively than the growth of the layer, while heating, before the voids are closed.