Patent ID: 11923236
Assignee: TURUN YLIOPISTO
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 18:
19. A semiconductor structure, formed by:
providing a crystalline silicon substrate have a substantially clean deposition surface in a vacuum chamber;
heating the crystalline silicon substrate to an oxidation temperature To in a range of 550 to 1200° C.; and
supplying, while keeping the crystalline silicon substrate in the oxidation temperature, with an oxidation pressure Po in a range of 1·10−8 to 1·10−4 mbar in the vacuum chamber, molecular oxygen O2 into the vacuum chamber with an oxygen dose Do in the range of 0.1 to 1000 Langmuir,
wherein at least part of the molecular oxygen supplied into the vacuum chamber is adsorbed onto the substantially clean deposition surface and diffuses into the crystalline silicon substrate, and a crystalline silicon oxide layer is formed within the crystalline silicon substrate, between a crystalline silicon base layer and a crystalline silicon top layer.