Implantation Beamline

The Implant Endstation is a manual single wafer handler. The chamber is designed to ensure accurate dose monitoring with uniform deposition.

Design

The wafer is attached to a platen, which can be electrically heated from 0°C to 500°C with a 7° tilt from the beam axis. The platen is mounted on a flange for access. Beam current is measured on the platen to determine dose using a dose integrator. The chamber supports 6″ (15cm) wafers. Immediately in front of the wafer are two suppression rings of opposite polarity. These rings are designed to suppress ions and electrons coming from the wafer in order to maintain an accurate dose reading. There is a carbon mask holder immediately in front of the suppression rings. The beam overscan is incident on the carbon mask.

The fixed chamber housing contains a roughout port, as well as a vent inlet located near the beam entrance. A pneumatic gate valve is positioned on the chamber entrance, prior to which is a turbo-molecular pump station to pump the beamline and endstation.

Applications

Semiconductor doping Damage study
Silicon substrates Sputtering
Surface finishing Gemstone modification

Target manipulator Target manipulator A schematic drawing and a photo of the Implantation Endstation

Source: https://www.pelletron.com/products/implant_endstation/