Raytheon Company

Other

Heidelberger Druckmaschinen Ag

Manfred R. Kuehnle

Hermann Statz

Manfred R Kuehnle

Wolfgang M Feist

Anton Rodi

Bharat B Patel

Irl W Smith

Terry A Dorschner

Stanley R Shanfield

Klaus Florian Schuegraf

Robert A Pucel

Arno Hagenlocher

Disclosed is a recording apparatus comprising a recording member having a recording surface with a variably conductive surface. The recording member may also have a conductive layer under a dielectric layer. Print heads for recording electronic images on dielectric surfaces are also disclosed.

Printing device with patterned recording surface

A field effect transistor having a substrate supporting an active layer comprising a Group III-V material. The active layer has a dopant concentration with a source electrode and a drain electrode disposed over and with a gate electrode disposed between the source and drain electrodes in Schottky barrier contact to the active layer. A surface layer portion of the active layer has a negatively charged surface potential disposed between the drain and gate electrodes comprised of said Group III-V material and oxygen. The surface layer portion has a thickness in the range of 25 .ANG. to 35 .ANG.. A layer of passivation material is disposed at least on the surface layer portion of the active layer.

Semiconductor devices

A print head having a plurality of voltage delivery points for recording electronic images on a dielectric recording surface is also disclosed, along with the recording member. The print head may write using alternating current sources.

Printing device and method

An electronic printing device is disclosed which uses flexible whiskers to transfer a charge corresponding to an image to a dielectric recording surface. The recording surface preferably has areas of differing conductivity so that microfields form on the dielectric surface. Ink, preferably non-charged, may then be attracted to the recording surface through dipole forces and later transferred to paper.

Electrostatic printing method and apparatus employing a whisker write

Composite materials that can be used to block radiation of a selected wavelength range or provide highly pure colors are disclosed. The materials include dispersions of metal particles that exhibit optical resonance behavior, presenting to the selected radiation absorption cross-sections that substantially exceed the particles' geometric cross-sections. The particles are preferably manufactured as uniform nanosize spheres, and dispersed evenly within a carrier material having compatible dielectric characteristics. The large absorption cross-sections ensure that a relatively small volume of particles will render the composite material fully opaque (or nearly so) to incident radiation of the resonance wavelength, blocking harmful radiation or producing highly pure colors. The durability of the particles themselves ensure resistance to mechanical wear forces and the bleaching effects of intense radiation (e.g., sunlight).

Metal-pigmented composite media with selectable radiation-transmission

A method of making a gas-impermeable, chemically inert container wall structure comprising the steps of providing a base layer of an organic polymeric material; conducting a pair of reactive gases to the surface of the base layer preferably by pulsed gas injection; heating the gases preferably by microwave energy pulses sufficiently to create a plasma which causes chemical reaction of the gases to form an inorganic vapor compound which becomes deposited on the surface, and continuing the conducting and heating until the compound vapor deposit on the surface forms a gas-impermeable, chemically inert barrier layer of the desired thickness on the surface. Various wall structures and apparatus for making them are also disclosed.

Method and apparatus for producing gas impermeable, chemically inert

Radiation-absorptive materials, suitable for fabrication into packages, sheets, inks, paints, decorative surface treatments, lotions, creams, and gels are disclosed. The materials exploit certain optical properties associated with uniform, spherical, nanosize particles to provide complete radiation absorption, over a selected bandwidth, at low concentration. One type of particle exhibits an 'absorption edge' at a chosen wavelength, transmitting radiation whose wavelength exceeds the characteristic bandgap wavelength, while effectively absorbing all radiation with wavelengths smaller than that minimum. Another type of particle exhibits 'optical resonance,' which causes radiation of a characteristic wavelength to interact with the particles so as to produce self-reinforcing internal reflections that strongly enhance the amplitude of the radiation trapped within the particle.

Composite media with selectable radiation-transmission properties

A passivation technique which significantly reduces degradation in reverse breakdown voltage characteristics usually introduced by passivation of active regions of field effect transistors is described. The technique uses a surface treatment in a plasma to introduce into the surface an electro-negative species to maintain negative surface potential of the surface subsequent to encapsulation by the passivation material.

Method of manufacturing a III-V semiconductor device using a self-biased

A ring laser gyro uses a nonplanar equilateral (skew rhombus) ring path. In the preferred embodiment, the mirrors used to produce such path are mounted on a supporting cube having passages cut in the path of a beam of electromagnetic energy propagating therebetween. Preferably, the mirrors are positioned on the surface of the cube and produce a nonplanar equilateral ring path having path segments in two planes. In one embodiment, four mirrors are placed on the corners of the cube to define the vertices of a tetrahedron circumscribed by the cube. With such an arrangement, the sensitive axis is along one of the three mutually orthogonal principal axes of the cube. The tetrahedral ring is equiangular as well as equilateral; thus, all the incidence angles on the mirrors are the same. In another embodiment, the orthohedral ring, two mirrors are placed on a first pair of adjacent corners of the cube and two mirrors are placed between the corners of two adjacent corner pairs to provide a path substantially on two of the faces of the cube.

Skewed rhombus ring laser gyro

An electromagnetic wave ring resonator is disclosed including means to spatially rotate the electromagnetic field distribution of waves resonant therein about the direction of propagation of such waves to enable such waves to resonate with opposite senses of circular polarization, and means, including a laser amplifier medium, to provide different indices of refraction to resonant waves of the same sense of circular polarization as they pass through such laser amplifier medium in different directions. With such arrangement the two mentioned means enable the waves to resonate with four different frequencies. In a laser gyroscope using such ring resonator the electromagnetic field distribution rotating means includes a catoptric arrangement which, together with the last-mentioned means, reduces the loss, scatter and linear birefringence associated with the ring resonator included in such gyroscope. The last-mentioned means produces the Zeeman effect in the laser medium and efficiently provides different optical pathlengths for waves passing through such medium because the magnetic field vector of such waves interacts with the processing atomic magnetic dipoles of the amplifier medium at the emission frequency of such amplifier medium.

Electromagnetic wave ring resonator

A Read-type avalanche diode having a low noise measure and capable of attaining output signal powers of one watt or more. An effective injection current is defined as the conduction current in the avalanche zone in the absence of avalanche multiplication including therein any tunneling current. The noise measure of the diode is minimized by increasing the defined effective injection current with disclosed techniques. In one embodiment, the effective injection current is increased by the presence of traps located in the avalanche region. In another embodiment, a Schottky barrier contact having a low work function is provided. Surface states of the avalanche region are also varied to produce the desired increase. Increased effective injection current may also be produced in a device with preferred heat flow properties. The noise performance of both oscillator and amplifier circuits is improved with the invention.

Low noise read-type diode

A semiconductor structure having a surface insulating layer formed as a grid with charges implanted in the insulating material to prevent inversion and, hence, channeling between adjacent semiconductor regions, preferably for use in a non-blooming vidicon. The method of manufacturing such a structure uses ion implantation to create immobile positive charges in a grid pattern in an insulating layer in regions spaced from the interface between the insulating layer and the semiconductor body. The insulating layer is of sufficient thickness that substantially all of the charge sites in the insulating layer are separated from the outer surface of the insulator by a sufficient distance to effectively prevent a negative electric field from reaching into the silicon.

Semiconductor devices having surface state control

A semiconductor structure having a surface insulating layer formed as a grid with charges implanted in the insulating material to prevent inversion and, hence, channeling between adjacent semiconductor regions, preferably for use in a nonblooming vidicon. The method of manufacturing such a structure uses ion implantation to create immobile positive charges in a grid pattern in an insulating layer in regions spaced from the interface between the insulating layer and the semiconductor body. The insulating layer is of sufficient thickness that substantially all of the charge sites in the insulating layer are separated from the outer surface of the insulator by a sufficient distance to effectively prevent a negative electric field from reaching into the silicon.

Semiconductor with surface insulator having immobile charges

A semiconductor structure having a surface insulating layer formed as a grid with charges implanted in the insulating material to prevent inversion and, hence, channeling between adjacent semiconductor regions, preferably for use in nonblooming vidicon. The method of manufacturing such a structure uses ion implantation to create immobile positive charges in a grid pattern in an insulating layer in regions spaced from the interface between the insulating layer and the semiconductor body. The insulating layer is of sufficient thickness that substantially all of the charge sites in the insulating layer are separated from the outer surface of the insulator by a sufficient distance to effectively prevent a negative electric field from reaching into the silicon.

Growing community of inventors

Wayland, MA, United States of America

Hermann Statz