Patent ID: 11908694
Assignee: INFINEON TECHNOLOGIES AG
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An ion beam implantation method, comprising:
orienting a substrate to a target axis, wherein a residual angular misalignment exists between the target axis and a preselected crystal channel direction in the substrate and is within an angular tolerance interval, wherein a channel acceptance width is effective for the preselected crystal channel direction;
determining an implant angle range, for dopant ion implantation, that is greater than 80%, and smaller than 500%, of a sum of (i) the channel acceptance width and (ii) twofold the angular tolerance interval that the residual angular misalignment is within; and
implanting, at implant angles within the implant angle range and through a first substrate main surface of the substrate, dopant ions into the substrate using an ion beam propagating along an ion beam axis, wherein:
the implant angles are between the ion beam axis and the target axis; and
the ion beam impinges in a same sub-region of the first substrate main surface for the implant angles at which the dopant ions are implanted.