Abstract:
The present invention teaches a method and apparatus for removing sacrificial materials in fabrications of microstructures using one or more selected spontaneous vapor phase etchants. The selected etchant is fed into an etch chamber containing the microstructure during each feeding cycle of a sequence of feeding cycles until the sacrificial material of the microstructure is exhausted through the chemical reaction between the etchant and the sacrificial material, Specifically, during a first feeding cycle, a first amount of selected spontaneous vapor phase etchant is fed into the etch chamber. At a second feeding cycle, a second amount of the etchant is fed into the etch chamber. The first amount and the second amount of the selected etchant may or may not be the same, The time duration of the feeding cycles are individually adjustable.
Abstract:
The present invention provides a method and apparatus of converting a stream of pixel data in space and time into a stream of bitplane data. In particular, the present invention converts the pixel data stream according to a predetermined output format. The apparatus of the present invention receives the pixel data in a “real-time” fashion, and dynamically performs predefined permutations so as to accomplish the predetermined transpose operation. Alternatively, the pixel data are stored in a storage medium, and the apparatus of the present invention retrieves the pixel DAT and perform the predetermined permutation to accomplish the predefined operation. The methods and apparatus disclosed herein are especially useful for processing a high-speed stream of digital data in a flow-through manner and suitable for implementation in a hardware video pipeline. The control signal fanout and gate count of this invention are reduced compared to currently available similar techniques for converting pixel data into bitplane data.
Abstract:
A micromirror device (122) is disclosed, along with a method of making such a micromirror device (122) that comprises a mirror plate (230), a hinge (214) and an extension plate (212). The extension plate (212) is formed on the mirror plate (230) and between the mirror plate (230) and the electrode (126) associated with the mirror plate (230) for rotating the mirror plate. The.extension plate (212) can be metallic or dielectric. Also disclosed is a method of making such a micromirror device. In particular, the extension plate (212) is formed after the formation of the mirror plate (230). Moreover, also disclosed is a projection system (102) that comprises a spatial light modulator (110) having an array of such micromirrors, as well as a light source (102), condensing optics, wherein light from the light source (102) is focused onto the array of micromirrors, projection optics for projecting light selectively reflected from the array of micromirrors (110) onto a target, and a controller for selectively actuating the micromirrors (122) in the array (110).
Abstract:
A spatial light modulator is disclosed, along with a method for making such a modulator that comprises an array of micromirror devices. The center-to-center distance and the gap between adjacent micromirror devices are determined corresponding to the light source being used so as to optimize optical efficiency and performance quality. The micromirror device comprises a hinge support formed on a substrate and a hinge that is held by the hinge support. A mirror plate is connected to the hinge via a contact, and the distance between the mirror plate and the hinge is determined according to desired maximum rotation angle of the mirror plate, the optimum gap and pitch between the adjacent micromirrors. In a method of fabricating such spatial light modulator, one sacrificial layer is deposited on a substrate followed by forming the mirror plates, and another sacrificial layer is deposited on the mirror plates followed by forming the hinge supports. The two sacrificial layers are removed via the small gap between adjacent mirror devices with spontaneous vapor phase chemical etchant. Also disclosed is a projection system that comprises such a spatial light modulator, as well as a light source, condensing optics, wherein light from the light source is focused onto the array of micromirrors, projection optics for projecting light selectively reflected from the array of micromirrors onto a target, and a controller for selectively actuating the micromirrors in the array.
Abstract:
A microelectromechanical device package with integral a heater and a method for packaging the micro-electromechanical device are disclosed in this invention. The microelectromechanical device package comprises a first package substrate and second substrate, between which a microelectromechanical device, such as a micromirror array device is located. In order to bonding the first and second package substrates so as to package the microelectromechanical device inside, a sealing medium layer is deposited, and heated by the heater so as to bond the first and second package substrates together.
Abstract:
A spatial light modulator is disclosed, along with methods for making such a modulator that comprises an array of mirror devices each having at least a preferably at least a first electrode and a second electrode. The first electrode is designated for driving the mirror plate of the micromirror device to an ON state, and the second electrode is designated for driving the mirror plate to an OFF state. The two electrodes can be disposed on the same side of the mirror plate but on opposite sides of the rotation axis of the mirror plate for driving the mirror plate to rotate in opposite directions. Alternatively, the two electrodes can be disposed on the opposite sides of the mirror plate, but on the same side of the rotation axis of the mirror plate for driving the mirror plate to rotate in opposite directions. The ON state and OFF state of the mirror plate can be defined by stops. The stops may be formed on substrate(s), hinge structures holding the mirror plates of the micromirror device and/or a desired location within the micromirror device. Alternatively, the electrodes for the ON state and the OFF state can be used as stops, either individually or in combination, or in combination with other component(s), such as substrate(s) of the micromirror device. The OFF state angle and the ON state angle are preferably different.
Abstract:
A spatial light modulator is disclosed, along with methods for making such a modulator that comprises an array of mirror devices each having at least a preferably at least a first electrode and a second electrode. The first electrode is designated for driving the mirror plate of the micromirror device to an ON state, and the second electrode is designated for driving the mirror plate to an OFF state. The two electrodes can be disposed on the same side of the mirror plate but on opposite sides of the rotation axis of the mirror plate for driving the mirror plate to rotate in opposite directions. Alternatively, the two electrodes can be disposed on the opposite sides of the mirror plate, but on the same side of the rotation axis of the mirror plate for driving the mirror plate to rotate in opposite directions. The ON state and OFF state of the mirror plate can be defined by stops. The stops may be formed on substrate(s), hinge structures holding the mirror plates of the micromirror device and/or a desired location within the micromirror device. Alternatively, the electrodes for the ON state and the OFF state can be used as stops, either individually or in combination, or in combination with other component(s), such as substrate(s) of the micromirror device. The OFF state angle and the ON state angle are preferably different.
Abstract:
Processes for the addition or removal of a layer or region from a workpiece (14) material by contact with a process gas, in the manufacture of a microstructure, are enhanced by the use of a recirculation of the process gas. Recirculation is effected by a pump (18) that has no sliding or abrading parts that contact the process gas nor any wet (such as oil) seals or purge gas in the pump (18). Improved processing can be achieved by a process chamber (15) that contains a baffle (16), a perforated plate (17), or both, appropriately situated in the chamber (15) to deflect the incoming process gas and distribute it over the workpiece (14) surface. In certain embodiments, a diluent gas is added to the recirculation loop (36) and continuously recirculated therein, followed by the bleeding of the process gas (such as an etchant gas) into the recirculation loop (36). Also, cooling of the process gas, etching chamber (15) and/or sample platen can aid the etching process. The method is particularly useful for adding to or removing material from a sample (14) of microscopic dimensions.
Abstract:
A spatial light modulator (12) includes an upper optically transmissive substrate (20) held above a lower substrate (34) containing addressing circuitry (36). One or more electrostatically deflectable elements (48) are suspended by hinges (50) from the upper substrate (20). In operation, individual mirrors (48) are selectively deflected and serve to spatially modulate light (56) that is incident to, and then reflected back through, the upper substrate (20). Motion stops (49) may be attached to the reflective deflectable elements so that the mirror (48) does not snap to the bottom substrate (34). Instead, the motion stop (49) rests against the upper substrate (20) thus limiting the deflection angle of the reflective deflectable elements (48).
Abstract:
Methods and apparatus for selectively updating memory cells of a memory cell array are provided. The memory cells of each row of the memory cell array are provided with a plurality of wordlines. Memory cells of the row are activated and updated by separated wordlines. In an application of display systems using memory cell arrays for controlling the pixels of the display system and pulse-width-modulation (PWM) technique for displaying grayscales, the pixels can be modulated by different PWM waveforms. The perceived dynamic-false-contouring artifacts are reduced thereby. In another application, the provision of multiple wordlines enables precise measurements of voltages maintained by memory cells of the memory cell array.