Patent ID: 8361894
Filing Date: 2013-01-29
Classification: H01L

Abstract:
1. A method of forming first and second FinFET devices in and above a first region and a second region of a semiconducting substrate, respectively, wherein said second FinFET device has a fin height that is greater than a fin height of said first FinFET device, the method comprising: forming a patterned mask layer above said substrate, said patterned mask layer covering said first region and exposing said second region for further processing; performing a first ion implantation process through said patterned mask layer to implant nitrogen into said second region; removing said patterned mask layer; performing a second ion implantation process to implant oxygen atoms into both said first and second regions; performing a heating process to cause said implanted oxygen atoms to combine with a material of said substrate to form a layer of insulating material at least in said first region; and after performing said heating process, performing at least one etching process to define at least one first fin in said first region and to define at least one second fin in said second region, said second fin having a greater height than a height of said first fin.