Patent ID: 6825532
Filing Date: 2004-11-30
Classification: H01L,Y10S

Abstract:
A semiconductor device formed by the method comprising:providing a wafer comprising a monocrystalline semiconductor material; implanting ions of the semiconductor material through a surface of the monocrystalline semiconductor wafer to a selected depth in said wafers thereby forming adjacent to said surface an amorphous layer of the semiconductor material, said amorphous semiconductor layer extending to a substantially planar zone disposed at substantially said selected depth and comprising monocrystalline semiconductor material damaged by lattice defects, undamaged by implantation monocrystalline semiconductor material below said selected depth comprising a second layer of the undamaged by implantation monocrystalline semiconductor material; heating said wafer under conditions effective to convert said amorphous semiconductor layer to a first layer of the monocrystalline semiconductor material; heating the wafer under conditions defective to coalesce said zone of monocrystalline semiconductor material damaged by lattice defects, thereby forming a substantially planar intrinsic gettering, zone comprising substantially pure semiconductor material and including active gettering sites, said gettering zone being disposed substantially at said selected depth; providing a handle wafer comprising on one surface an insulating bond layer; and bonding said insulating bond layer to said surface of said wafer, thereby forming a bonded semiconductor-on-insulator substrate comprising a handle wafer, an insulating bond layer, and a monocrystalline semiconductor device wafer, said device wafer containing a substantially planar intrinsic gettering zone that comprises substantially pure semiconductor material and includes active gettering sites; forming a semiconductor device on said second layer of undamaged by implantation monocrystalline semiconductor material or on layer of epitaxial monocrystalline semiconductor material deposited on said second layer; and wherein the said semiconductor device is formed on said epitaxial layer.