Patent ID: 11887848
Assignee: AIXTRON SE
Field: Semiconductors (Electrical engineering)
Classification: CPC H  C | IPC C  H

Claim 10:
11. A method for depositing a nucleation layer (3) comprised of group III and V elements directly onto a surface (2) of a substrate (1) made of a group IV element, the method comprising:
introducing a first gaseous starting material containing a group III element together with a second gaseous starting material containing a group V element into a process chamber (8) containing the substrate (1) at a process temperature greater than 500° C.; and
at least at a start of the deposition of the nucleation layer (3), a third gaseous starting material containing a group IV element is fed into the process chamber (8) together with the first and second gaseous starting materials,
wherein a partial pressure and/or mass flow of the third gaseous starting material in the process chamber (8) is chosen so as to result in a dopant concentration of not more than 1×1018 cm−3, and wherein the nucleation layer (3) is deposited under total pressures between 30 and 300 mbar.