摘要:
Electrode surfaces are coated with a passivating material (silicon dioxide, aluminum oxide or titanium dioxide) or with a reflecting material (chromium or chromium and gold) or with a special alignment material (carbon) using standard vacuum sputtering, vacuum evaporation, electrodeposition, or chemical vapor deposition techniques. After sufficient thickness of material has been deposited, the substrate is exposed to a broad or narrow beam of neutralized argon ions of a few kilo-electron-volts energy. The beam of argon ions is incident at a grazing angle to the surface, typically 20.degree.. Exposure of the overcoating results in a microscopic condition believed to comprise a "corrugated" surface with "ridges" and "valleys" parallel to the direction of the incident beam. These microscopically fine grooves or streaks are (1) reproducibly effective in causing parallel alignment of the liquid crystal molecules, (2) are durable to repeated cleaning procedures and air-bake treatments, and (3) are amenable to production applications in conjunction with vacuum deposition equipment.
摘要:
A method for fabricating resilient z-axis contacts to electrically interconnect IC wafers or MCMs in 3-D integrated circuits uses photolithography to provide larger carrier sizes, higher contact densities by decreasing the spacing, smaller contact footpads, and precise control of the contact's shape and position. The contacts are fabricated by forming photoresist patterns on the carrier's top and bottom surfaces that are initially rectangular, and then reflowing the photoresist materials to provide smooth surfaces suitable for forming the metal contacts, and depositing metal layers over the respective patterns. Second photoresist patterns are formed over respective metal layers to conform with the contact's shape, the metal is etched away according to the pattern, and the photoresists are removed such that the remaining metalization forms a resilient z-axis contact that is attached to the carrier and extends therefrom with a predetermined shape.
摘要:
A 3-D IC chip assembly is formed from stacked substrates in which each individual substrate has a plurality of different IC chips retained in respective recesses. Conductive feedthroughs extend through the substrate from the side where the chips are located to the opposite side, with the chips electrically connected to the feedthroughs. An electrical routing network on the opposite side of the substrate from the chips provides desired interconnections between the chips by connecting to the feedthroughs. The routing can be formed by standard photolithographic techniques.
摘要:
A wire grid polarizer may be fabricated by forming plurality of substantially-straight metallic lines of predetermined periodicity Λ on a thin film substrate A plurality of substantially straight nanometer-scale periodic surface relief structures is created on a surface of the substrate. The periodic surface relief structures cover a region greater than about 4 centimeters in length and greater than about 4 centimeters in width, wherein the periodicity Λ is between about 10 nanometers and about 500 nanometers. One or more layers of material are formed on the periodic relief structures. The one or more layers include one or more conductor materials that form the plurality of substantially straight metallic lines over a region of the substrate greater than about 4 centimeters in length and greater than about 4 centimeters in width.
摘要:
A direct view display apparatus is disclosed. The direct view display apparatus comprises a source of backlight, a liquid crystal array; a tandem reflective polarizer having two or more reflective polarizer elements disposed in tandem between the source of backlight and the liquid crystal array; and a second polarizer. The liquid crystal array is disposed between the tandem reflective polarizers and the second polarizer. The second polarizer is an absorptive polarizer.
摘要:
A method for forming a plurality of parallel metal lines on a substrate of thin film elastomeric material and a wire grid polarizer formed by such method. A sacrificial layer is formed by coating the substrate with a water soluble polymer while the substrate is stretched. The existing tensile force is removed, leaving an undulating topology of buckled sacrificial layer material. A masking layer is then deposited at an oblique angle and then fractured into parallel lines of material by application of a second tensile force. Unmasked portions of the sacrificial layer are removed by dry etch. A metallic layer is then deposited and a lift off process employed to remove remaining portions of the sacrificial layer and materials deposited thereover. Upon removal of the second tensile force, the substrate returns to its unstressed length with metal lines of predetermined periodicity thereon.
摘要:
A sequence of MEMS processing steps are used to construct a 2D optical switch on a single substrate. In a typical optical switch configuration, an array of hinged micromirrors are supported by an array of posts at a 45° angle to the input and output optical paths and positioned parallel to the substrate either above, below or, perhaps, in the optical paths. The application of a voltage between the mirror and its control electrodes switches the mirror to a vertical position where it intercepts and deflects light travelling down the optical paths. The posts are suitably oriented at a 90° angle with respect to the mirror hinges so that they do not interfere with the optical paths and, may be configured to function as baffles to reduce crosstalk between adjacent optical paths.
摘要:
An electrostatically actuated micromirror light modulator that exhibits increased deflection range, better charge efficiency and improved electrostatic stability. A thin insulating membrane decouples the electron beam from the micromirror array inside the vacuum cell. The membrane is just thick enough to stop the incident electrons from penetrating through to the mirrors but is thin enough to maintain resolution of the deposited charge pattern. An equipotential layer beneath the mirror array prevents any attractive force from being developed due to the accumulation of static charge on the surface of the light modulator that may otherwise cause the mirror to snap-over and become stuck to the substrate.
摘要:
A method and associated means for producing simultaneous electrical representations of the electrical and acoustical (heart sound) activity of the heart, in which a pickup device and associated circuits produce a full wave rectified symmetrical heart sound signal annotated by pulses developed from the QRS wave of the electrocardiogram signal.The pickup device is designed to permit the direct (unbuffered) application of the pickup electrodes to the skin of the body and to provide a control of the associated circuits when not in contact with the body to shorten response times when the pickup device is placed in contact with the body.
摘要:
A liquid crystal device biased by an alternating current having a predetermined frequency higher than the dispersion frequency of the liquid crystal material. The liquid crystal device exhibits inherent capacitance across its input terminals which is resonated by an inductor to result in a higher bias current and reduction of image smear of images displayed by such device.