Patent ID: 6741016
Filing Date: 2004-05-25
Classification: B82Y,G11B,G11C,H01J

Abstract:
An electrostatic lens for focusing electrons from a cathode to an anode, comprising:a first conductive layer having a first opening at a first distance from the cathode, the first conductive layer held at a first voltage; and a second conductive layer having a second opening at a second distance from the first conductive layer and a third distance to the anode layer, the second conductive layer held at a second voltage substantially equal to a voltage of the anode; wherein the first opening and the second opening are about the same diameter, the first voltage less than a voltage of the cathode that is less than the second voltage, the first distance is between one and one-half the sum of the second distance and the third distance to focus the electrons emitted from the cathode onto the anode to a spot size less than 40 nanometers.