Patent ID: 9184045
Filing Date: 2015-11-10
Classification: C23C,H01J,H01L

Abstract:
1. A plasma enhanced atomic layer deposition (PEALD) system, comprising: a precursor gas inlet configured to provide a precursor gas into a processing chamber configured to house a semiconductor workpiece; a reactant gas inlet configured to provide a reactant gas into the processing chamber; an ionizing component configured to ionize the precursor gas to form a plurality of ionized precursor molecules and to subsequently ignite a plasma from the reactant gas, wherein the plasma causes a reaction between the ionized precursor molecules and the reactant gas that forms a deposited layer; a bias element configured to apply a bias voltage to the semiconductor workpiece that anisotropically attracts the ionized precursor molecules to the semiconductor workpiece; and a control unit configured to operate valves to introduce the precursor gas and the reactant gas into the processing chamber at non-overlapping, different time periods, and to send control signals that bias the semiconductor workpiece during ionization of the precursor gas and that subsequently ignite the plasma from the reactant gas.