摘要:
A RF MOS- or nonlinear device-based surveillance and/or identification tag, and methods for its manufacture and use. The tag generally includes (a) an inductor, (b) a first capacitor plate coupled to the inductor, (c) a dielectric film on the first capacitor plate, (d) a semiconductor component on the dielectric film, and (e) a conductor that provides electrical communication between the semiconductor component and the inductor. The method of manufacture generally includes (1) depositing a semiconductor material (or precursor) on a dielectric film; (2) forming a semiconductor component from the semiconductor material/precursor; (3) forming a conductive structure at least partly on the semiconductor component; and (4) etching the electrically functional substrate to form (i) an inductor and/or (ii) a second capacitor plate. The method of use generally includes (i) causing/inducing a current in the present tag sufficient for it to generate detectable electromagnetic radiation; (ii) detecting the radiation; and optionally, (iii) selectively deactivating the tag. The present invention advantageously provides a low cost EAS/RFID tag capable of operating at MHz frequencies and in frequency division and/or frequency multiplication modes.
摘要:
A nonvolatile memory cell is disclosed, having first and second semiconductor islands at the same horizontal level and spaced a predetermined distance apart, the first semiconductor island providing a control gate and the second semiconductor island providing source and drain terminals; a gate dielectric layer on at least part of the first semiconductor island; a tunneling dielectric layer on at least part of the second semiconductor island; a floating gate on at least part of the gate dielectric layer and the tunneling dielectric layer; and a metal layer in electrical contact with the control gate and the source and drain terminals. In one advantageous embodiment, the nonvolatile memory cell may be manufactured using an “all-printed” process technology.
摘要:
An assembly for holding a substrate is provided. The substrate has a first surface, a second surface, opposite the first surface and an outer peripheral portion. The assembly includes a holding body having a support surface for supporting the substrate. The holding body has an aperture for passing therethrough a gas having a thermal conductivity. Additionally, the assembly includes a heat transferring seal having a first surface for frictionally engaging the second surface of the substrate. The heat transferring seal has a second surface, opposite the first surface, for frictionally engaging the support surface of the holding body. The heat transferring seal also has an inner peripheral portion defining an opening for receiving the gas. The heat transferring seal has a thermal conductivity closely matched with the first thermal conductivity of the gas for providing substantially uniform heat transfer across the substrate.
摘要:
Radio frequency identification (RFID) tags and processes for manufacturing the same. The RFID device generally includes (1) a metal antenna and/or inductor; (2) a dielectric layer thereon, to support and insulate integrated circuitry from the metal antenna and/or inductor; (3) a plurality of diodes and a plurality of transistors on the dielectric layer, the diodes having at least one layer in common with the transistors; and (4) a plurality of capacitors in electrical communication with the metal antenna and/or inductor and at least some of the diodes, the plurality of capacitors having at least one layer in common with the plurality of diodes and/or with contacts to the diodes and transistors. The method preferably integrates liquid silicon-containing ink deposition into a cost effective, integrated manufacturing process for the manufacture of RFID circuits. Furthermore, the present RFID tags generally provide higher performance (e.g., improved electrical characteristics) as compared to tags containing organic electronic devices.
摘要:
Embodiments of the present invention relate to a rectifier circuit and methods of making the same for use in wireless devices (e.g., RFID tags). The present invention is drawn to a rectifier circuit comprising first and second diode-wired transistors in series, each having a gate oxide layers of the same target thickness. The first diode-wired transistor receives an alternating current and the second diode-wired transistor provides a rectifier output. The first and second diode-wired transistors are configured to divide between them a first voltage differential across the rectifier circuit. The gate oxides are exposed to a peak stress that is similar to a stress on the gate oxide of logic transistors made using the same process. The present invention is further drawn to a method of making a rectifier circuit, comprising printing a plurality of transistor bodies on a substrate, forming a gate oxide on each of the transistor bodies and a gate on each gate oxide, doping exposed portions of the transistor body to form first and second source/drain terminals therein, and forming interconnects electrically connecting the first source/drain terminals to the gate over the corresponding transistor body.
摘要:
A self-aligned top-gate thin film transistor (TFT) and a method of forming such a thin film transistor, by forming a semiconductor thin film layer; printing a doped glass pattern thereon, a gap in the doped glass pattern defining a channel region of the TFT; forming a gate electrode on or over the channel region, the gate electrode comprising a gate dielectric film and a gate conductor thereon; and diffusing a dopant from the doped glass pattern into the semiconductor thin film layer.
摘要:
Dopant-group substituted (cyclo)silane compounds, liquid-phase compositions containing such compounds, and methods for making the same. Such compounds (and/or ink compositions containing the same) are useful for printing or spin coating a doped silane film onto a substrate that can easily be converted into a doped amorphous or polycrystalline silicon film suitable for electronic devices. Thus, the present invention advantageously provides commercial qualities and quantities of doped semiconductor films from a doped “liquid silicon” composition.
摘要:
Various embodiments of methods and systems for varying the compression ratio in opposed-piston engines are disclosed herein. In one embodiment, an opposed-piston engine can include a first phaser operably coupled to a first crankshaft and a second phaser operably coupled to a corresponding second crankshaft. The phase angle between the crankshafts can be changed to reduce or increase the compression ratio in the corresponding combustion chamber to optimize or at least improve engine performance under a given set of operating conditions.
摘要:
The present invention relates to methods of making capacitors for use in surveillance/identification tags or devices, and methods of using such surveillance/identification devices. The capacitors manufactured according to the methods of the present invention and used in the surveillance/identification devices described herein comprise printed conductive and dielectric layers. The methods and devices of the present invention improve the manufacturing tolerances associated with conventional metal-plastic-metal capacitor, as well as the deactivation reliability of the capacitor used in a surveillance/identification tag or device.
摘要:
Methods for forming doped silane and/or semiconductor thin films, doped liquid phase silane compositions useful in such methods, and doped semiconductor thin films and structures. The composition is generally liquid at ambient temperatures and includes a Group IVA atom source and a dopant source. By irradiating a doped liquid silane during at least part of its deposition, a thin, substantially uniform doped oligomerized/polymerized silane film may be formed on a substrate. Such irradiation is believed to convert the doped silane film into a relatively high-molecular weight species with relatively high viscosity and relatively low volatility, typically by cross-linking, isomerization, oligomerization and/or polymerization. A film formed by the irradiation of doped liquid silanes can later be converted (generally by heating and annealing/recrystallization) into a doped, hydrogenated, amorphous silicon film or a doped, at least partially polycrystalline silicon film suitable for electronic devices. Thus, the present invention enables use of high throughput, low cost equipment and techniques for making doped semiconductor films of commercial quality and quantity from doped “liquid silicon.”