Patent ID: 8865324
Filing Date: 2014-10-21
Classification: C30B,Y10T

Abstract:
1. A monocrystalline SiC substrate, comprising: a substrate structure having a main substrate surface with a main substrate surface region, a substrate thickness, and a mean specific electrical resistance which is determined based on said main substrate surface region, which is at least 90% in size of said main substrate surface, and on said substrate thickness, wherein it applies to said main substrate surface region that a local specific electrical resistance determined for any part surface which is 4 mm said main substrate surface having an edge exclusion region being at most 10% in size of said main substrate surface and surrounding said main substrate surface region; said main substrate surface region being a facet region, a jump of an electrical resistance being provided at a transition from said facet region to said edge exclusion region, said facet region, with an optical transillumination of the monocrystalline SiC substrate, being distinguished by a darker (color) impression relative to said edge exclusion region; and said edge exclusion region having a mean specific electrical edge resistance being higher than a mean specific electrical resistance of said main substrate surface region.