Abstract:
An electron lens is used for focusing electrons from a cathode (10) to an anode (30). The lens includes a first conductive layer (36) with a first opening (38) at a first distance (48) from the cathode (10). The first conductive layer (36) is held at a first voltage. The lens also includes a second conductive layer (32) with a second opening (34) at a second distance (46) from the first conductive layer (36) and a third distance (24) from the anode (30). The second conductive layer (32) is held at a second voltage substantially equal to the voltage of the anode (30). The first (38) and second (34) openings are chosen based on the first voltage, the second voltage, the first distance (48), the second distance (46) and the third distance (24). The opening focuses the electrons emitted from the cathode (10) onto the anode (30) to a spot size preferably less than 40 nanometers. The force created between the cathode (10) and anode (30) is minimized by the structure of the lens.
Abstract:
A photosensitive member having an electrode on the front surface thereof and a photoconductive layer stacked on the electrode. The member faces an electrostatic data recording medium which comprises a charge-holding layer having an electrode on the back surface. The photosensitive member may be in contact with the recording medium. When a voltage is applied across the electrodes, an exposure is carried out to form an electrostatic charge pattern in the electrostatic data recording medium, the electrostatic charge pattern being in correspondence with the exposure pattern. The layer structure of the photosensitive member and the photoconductive layer and the method of forming the photoconductive layer are improved, enabling the recording of electrostatic data on the electrostatic data recording medium with high sensitivity. Further, the contrast in charges of data between the exposed portion and the unexposed portion can be improved.
Abstract:
An emitter (50,100) includes an electron supply (60) and a tunneling layer (20) disposed on the electron supply. A cathode layer (14) is disposed on the tunneling layer. A conductive electrode (53) has multiple layers of conductive material (52,54). The multiple layers include a protective layer (54) disposed on the cathode layer. The conductive electrode has been etched to define an opening (26) thereby exposing a portion of the cathode layer.
Abstract:
A data storage device including a substrate, a data storage layer on the substrate, and a spin-polarized electron source. The data storage layer comprises a fixed number of atomic layers of a magnetic material which provide the data storage layer with a magnetic anisotropy perpendicular to a surface of the data storage layer. A data magnetic field is created in the data storage layer. The data magnetic field is polarized either in a first direction corresponding to a first data value or in a second direction corresponding to a second data value. Data is stored in the data storage layer by providing a spin-polarized electron having an electron magnetic field with a direction of polarization corresponding to one of the first and the second data values, the electron having a wavelength "characteristic" of unpaired electrons in the data storage layer which cause the magnetic moment of the material, and directing the spin-polarized electron at the data magnetic field to impart the direction of polarization of the electron magnetic field to the data magnetic field. Data is read from the data storage layer by directing the spin-polarized electron at a second wavelength at the data magnetic field and detecting a deflection or attraction of the spin-polarized electron by the data magnetic field. Alternatively, data is read from the data storage layer by directing the spin-polarized electron at the data magnetic field so that the magnetic medium produces a secondary electron and then detecting certain characteristics of the secondary electron.
Abstract:
A data storage medium comprising a substrate and a data storage layer formed on the substrate. The data storage layer comprises a fixed number of atomic layers of a magnetic material which provide the data storage layer with a magnetic anisotropy perpendicular to a surface of the data storage layer. A data magnetic field is created in the data storage layer. The data magnetic field is polarized either in a first direction corresponding to a first data value or in a second direction corresponding to a second data value. Data is stored in the data storage layer by providing a spin-polarized electron having an electron magnetic field with a direction of polarization corresponding to one of the first and the second data values, and directing the spin-polarized electron at the data magnetic field to impart the direction of polarization of the electron magnetic field to the data magnetic field. Data is read from the data storage layer by directing the spin-polarized electron at the data magnetic field and detecting a deflection or attraction of the spin-polarized electron by the data magnetic field. Alternatively, data is read from the data storage layer by directing the spin-polarized electron at the data magnetic field so that the magnetic medium produces a secondary electron and then detecting certain characteristics of the secondary electron.