Patent ID: 8664619

Claim:
A hybrid electrostatic lens comprising: an Einzel lens defined by an elongated tube having a first and second ends and a first electrode disposed at the first end and a second electrode disposed at the second end, the elongated tube being configured to receive a voltage bias to generate an electric field for focusing an ion beam therein; wherein the electrostatic lens is a quadrupole lens having a first stage defined by four quadrupole lenses turned 90° with respect to each other to define a pathway in the Z direction through the elongated tube; and electrostatic lenses disposed within the elongated tube of the Einzel lens, the electrostatic lenses configured to adjust focusing of the ion beam in an X direction and a Y direction orthogonal to the X direction as the beam is transmitted through the electrostatic lenses in a Z direction which is orthogonal to a plane defined by the X direction and the Y direction.