Patent ID: 7927985

Claim:
A method of manufacturing semiconductor devices which includes a support having a metal surface and a semiconductor film formed on said metal surface of said support, comprising: a semiconductor film growing step of epitaxially growing said semiconductor film on a growth substrate; a support forming step of forming said support on a surface of said semiconductor film such that said metal surface is attached to said surface of said semiconductor film; a growth substrate removing step of removing said growth substrate from said semiconductor film; a first flattening step of flattening a surface of said semiconductor film exposed by removing said growth substrate; a first etching step of partially etching said semiconductor film along device division lines at the surface flattened at said first flattening step by dry etching to form grooves in said semiconductor film, said grooves having a lattice form and not reaching said support; a second flattening step of flattening a surface of said semiconductor film at the bottom of said grooves; a second etching step of further partially etching said semiconductor film along said device division lines at the bottom of said grooves by wet etching to expose said metal surface of said support at the bottom of said grooves; and a groove forming step of forming division grooves in said support exposed at the bottom of said grooves.