H01L 29/165

Semiconductor bodies {; Multistep manufacturing processes therefor} characterised by the materials of which they are formed including, apart from doping materials or other impurities, only elements of Group IV of the Periodic System including two or more of the elements provided for in group [CPC: H01L29/16] {, e.g. alloys } in different semiconductor regions {, e.g. heterojunctions}