摘要:
A field emission device (400) includes a plastically-deformable, ceramic, stamped substrate (200) made from a plastically deformable ceramic, which in the preferred embodiment includes a calendered tape. The plastically-deformable, ceramic, stamped substrate (200) includes first and second opposed surfaces (202, 204) and defines apertures (206) in which are formed extraction electrodes (410). The field emission device (400) further includes an electron-emissive layer (418) being formed on the first opposed surface (202). Cathodes (420) are disposed on the electron-emissive layer (418) and cross the extraction electrodes (410) at an angle of 90.degree.. A method for fabricating said field emission device (400) includes stamping a layer (100) of the softened calendered tape with a die (300) to define the apertures (206) and grooves (208, 212, 214).
摘要:
A method for affixing spacers (126, 226, 326) in a field emission display (100, 200, 300) includes the steps of: (i) providing a first display plate; providing a plurality of spacers (126, 226, 326) having first (128, 228, 328) and second opposed edges (130, 230, 330), (ii) coating first opposed edge (128, 228, 338) with a bonding layer (132, 232, 332), (iii) forming a metallic bonding pad (134, 234) on an inner surface (106, 206, 306) of first display plate, and (iv) applying a energy beam (136, 236, 336) to the bonding layer (132, 232, 332) and metallic bonding pad (134, 234), thereby forming a metallic bond.
摘要:
A method of filtering an AC signal using a piezoelectric beam is provided. A piezoelectric film is formed on a mechanical support and a portion of the piezoelectric film forms a beam which extends beyond the mechanical support so that a cavity is formed underneath the beam, and the beam is free to vibrate in the cavity at a resonant frequency when an acoustic wave is propagated in the piezoelectric layer.A depletion region is formed under a Schottky contact which serves as a drive electrode. An unfiltered AC signal is coupled to the drive electrode thereby establishing an acoustic wave when the unfiltered AC signal comprises a component at the resonant frequency. Surface charge on the piezoelectric film resulting from vibration of the beam allows the resonant frequency component of the unfiltered AC signal to pass through the depletion region. Alternatively, the resonant frequency component can be passed by a tunnel current through the cavity.
摘要:
A heterojunction bipolar transistor (HBT) is provided having a silicon substrate in which a conventional junction base is formed. A coherently strained layer of semiconductor material having a wider band gap than silicon, such as gallium phosphide, is formed over the base to form a first portion of an emitter multilayer. A second portion of the emitter multilayer comprises silicon which can be epitaxially grown on the coherently strained layer. A thin heteropotential barrier is thus formed at the base-emitter junction which preferentially allows electrons to move from emitter to base while significantly reducing hole current from base to emitter, thereby improving emitter injection efficiency and current gain.
摘要:
The present invention provides devices capable of testing the electrical performance of thin-film transistor backplane arrays and methods for their use.
摘要:
A method for affixing a plurality of spacers (102) within a field emission display (160) is disclosed. The method includes the steps of: (i) providing a plurality of members (104), (ii) coating an edge (106) of each of the plurality of members (104) with a metal to provide a bonding layer (108), (iii) forming a metallic bonding pad (132) on the inner surface of an anode (120) to provide a modified anode (130), (iv) affixing a plurality of metallic compliant members (112) to the bonding layer (108) by using ball bonding techniques, and (v) affixing the metallic compliant members (112) to the metallic bonding pad (132), while positioning the spacer (102) perpendicularly with respect to the modified anode (130), by using thermocompression metal bonding techniques.
摘要:
A field emission device (200, 300, 400, 500) includes a supporting substrate (210, 310, 410, 510), a cathode (215, 315, 415, 515) formed thereon, a plurality of electron emitters (270, 370, 470, 570) and a plurality of gate extraction electrodes (250, 350, 450, 550) proximately disposed to the plurality of electron emitters (270, 370, 470, 570) for effecting electron emission therefrom, a major dielectric surface (248, 348, 448, 548) disposed between the plurality of gate extraction electrodes (250, 350, 450, 550), a charge dissipation layer (252, 352, 452, 552) formed on the major dielectric surface (248, 348, 448, 548), and an anode (280, 380, 480, 580) spaced from the gate extraction electrodes (250, 350, 450, 550).
摘要:
A single substrate, vacuum fluorescent display including a first layer of electrically conductive material positioned on a supporting substrate and a light emitting layer including phosphor positioned on the first layer. A second layer of electrically conductive material is supported on the substrate and electrically insulated from the first layer. An electron emitting layer of low work function material is positioned on the second layer and further positioned so that emitted electrons strike the light emitting layer. Since both the electron emitting and the light emitting layers are supported on the substrate, an encapsulating window is simple and easy to construct. Integrated drivers are optionally formed in the supporting substrate.
摘要:
A vacuum gap dielectric field emission triode and a method of fabrication include a conductive layer positioned on a supporting substrate and an emitter positioned on the conductive layer. A gate metal layer electrically separated from the conductive layer defines a metal bridge gate surrounding the emitter and separated from the emitter by a substantially fixed distance. The gate metal layer defines a gate opening through the metal bridge gate overlying the emitter. An anode is positioned in spaced relationship to the gate metal layer and the triode is sealed in a substantial vacuum so that the emitter is separated from the metal bridge by the substantial vacuum and the metal bridge is separated from the anode by the substantial vacuum.
摘要:
A portable communications receiver with virtual image display including a semiconductor array providing a real image and an optical system mounted to receive the real image and produce a virtual image at a viewing aperture. Electronics are associated with the array to produce real images in accordance with messages received by the receiver. The display is sufficiently small to mount in a hand held microphone for viewing by the operator while using the microphone.