Abstract: An apparatus and a method for calibrating the position of a wafer platform in an ion implanter, and particularly in a medium current ion implanter. The apparatus is constructed by a curvilinear piece formed in a half-circular shape, a pair of linear rods for supporting the curvilinear piece, and at least one cross-bracing rod connected in-between the pair of linear rods for providing rigidity of the apparatus. When the inside peripheral surface of the curvilinear piece intimately engages an outside peripheral surface of the wafer platform of the ion implanter, or when the first and second linear rods fit snugly on the implanter indicative that the wafer platform is properly calibrated at a zero-angle position. When such fitting is not possible, the wafer platform is then adjusted until a snug fitting is made possible.

Abstract: A gaseous supply system and method for operating the same is disclosed for supplying at least one gaseous source material to an ion source chamber for use with an ion implanter including at least one gas supply module in gaseous communication with an ion source chamber including at least one pneumatic valve to control the delivery of at least one gaseous source material to the ion source chamber for generation of source material ions for implantation including a driver gas source in communication with said at least one pneumatic valve for operating the at least one pneumatic valve said driver gas source having a different atomic mass unit than the source material ions for implantation generated from the at least one gaseous source material.

Abstract: An apparatus and a method for calibrating the position of a wafer platform in an ion implanter, and particularly in a medium current ion implanter. The apparatus is constructed by a curvilinear piece formed in a half-circular shape, a pair of linear rods for supporting the curvilinear piece, and at least one cross-bracing rod connected in-between the pair of linear rods for providing rigidity of the apparatus. When the inside peripheral surface of the curvilinear piece intimately engages an outside peripheral surface of the wafer platform of the ion implanter, or when the first and second linear rods fit snugly on the implanter indicative that the wafer platform is properly calibrated at a zero-angle position. When such fitting is not possible, the wafer platform is then adjusted until a snug fitting is made possible.

Abstract: A fixing structure for extension cards includes a set of extension slots, a positioning element and a resilient plate. The positioning element engages on an external side of the set of the extension slots, and the resilient plate is fixing on an internal side of the set of the extension slots. A folded edge of the resilient plate is inserted through a first mounting slot of the positioning element to firmly secure the positioning element on a computer casing. A stem of the resilient plate is pulled toward an inside of the computer casing to release the folded edge of the resilient plate from the first mounting slot of the positioning element so that the positioning element is pushed upward to disengage from the set of extension slots.

Abstract: A method for reducing a dinitrogen (N2) ion concentration in an ion implanter including providing an ion implanter having an ion source chamber for producing source ions said ion source chamber surrounded by a plurality of source magnets having a current supply for altering a position of said source ions; providing a gaseous source of material to the ion source chamber for ionization thereby creating a supply of source ions for implantation; creating a supply of source ions to include dinitrogen (N2) ions and nitrogen (N) ions supplied for implantation; and, increasing a current supply to at least one of the plurality of source magnets such that a ratio of dinitrogen (N2) ions to nitrogen (N) ions supplied for implantation is reduced.

Abstract: A method for reducing a dinitrogen (N2) ion concentration in an ion implanter including providing an ion implanter having an ion source chamber for producing source ions said ion source chamber surrounded by a plurality of source magnets having a current supply for altering a position of said source ions; providing a gaseous source of material to the ion source chamber for ionization thereby creating a supply of source ions for implantation; creating a supply of source ions to include dinitrogen (N2) ions and nitrogen (N) ions supplied for implantation; and, increasing a current supply to at least one of the plurality of source magnets such that a ratio of dinitrogen (N2) ions to nitrogen (N) ions supplied for implantation is reduced.

Abstract: An apparatus and a method for entering information into an electronic device are provided. The apparatus (200) includes five text-input buttons (102, etc) that can be activated by pressing or by touching. In one embodiment, the buttons are located on a disk (302). Text is entered by pressing or touching a single text-input button and then passing a finger or thumb over additional buttons in a prescribed order. The apparatus may be used in conjunction with additional input devices, such as an ‘accept’ or ‘OK’ button. Four navigation buttons (104, etc) are also provided. In one embodiment, these are additional buttons. In a further embodiment, four of the five text-input buttons are selectable as navigation buttons. The selection may be achieved by rotation of the disk (302) on which the buttons are located. The apparatus may also include a rotatable wheel or roller (108) to permit scrolling through lists.

Abstract: This invention relates to a method for detecting and compensating the disk tilt of an optical disk and an apparatus using it. The disk tilt causes the coma which degrades the carrier-to-signal ratio of a pickup. To reduce the coma induced by the disk tilt of an optical disk, the pickup of the present invention adapts a two-dimension (2-D) grating to produce a plurality of laser beams for detecting the disk tilt in the radial and tangential direction of the optical disk. In addition, according to the radial and tangential tilts of the disk, an actuation device adjusts a reflection angle of a reflective mean to change the incident angles of the laser beams for the compensation of the coma induced by the disk tilt of the optical disk.

Abstract: A gaseous supply system and method for operating the same is disclosed for supplying at least one gaseous source material to an ion source chamber for use with an ion implanter including at least one gas supply module in gaseous communication with an ion source chamber including at least one pneumatic valve to control the delivery of at least one gaseous source material to the ion source chamber for generation of source material ions for implantation including a driver gas source in communication with said at least one pneumatic valve for operating the at least one pneumatic valve said driver gas source having a different atomic mass unit than the source material ions for implantation generated from the at least one gaseous source material.

Abstract: A directional dynamic microphone includes a protective cover, a diaphragm in air-tight engagement with the cover, a voice coil, and a magnet with a core pole member and a tubular pole member and disposed rearwardly of the diaphragm. The magnet has an outer front circumferential portion which is spaced apart from an annular wall of the cover to confine a sound passage therebetween, an outer intermediate circumferential portion which engages the annular wall and which defines a sound port opening outwardly and radially for air communication with the sound passage, and an outer rear circumferential portion with sound holes angularly displaced therein and smaller than the sound port. Each sound hole extends inwardly and radially for air communication with a rear major side of the diaphragm. A phase shift effecting sheet veils the sound port so as to impart the microphone with a unidirectional characteristic.

Abstract: A bifocal optical pickup head is disclosed for use in a optical pickup apparatus having a single objective lens, for generating two different focuses (bifocus) to access a compact disc (CD) and a digital versatile disc (DVD), which the thickness is different. When a beam passes through an optical element disclosed in the present invention, numerical aperture is controlled and spherical aberration is reduced by the optical element due to variations in optical path and radius. Therefore, after beams having different numerical apertures are focused by an objective lens, various focuses can be obtained.

Abstract: The present invention pertains to a structure of pick-up head and its method for accessing signals, which operates in coordination with a disk made by ferroelectric material. An electric field is generated around the ends of two conductive wires by exerting a voltage on the wires. When the ends of the two wires are being close to the disk, the electric field polarizes the data-storing surface, which is formed by the ferroelectric material, so as to reach the function of writing. And as reading is needed, the two wires are also utilized of being induced by the electric lines of polarized area on the ferroelectric material to solve the data signals stored on the disk. Because the structure of pick-up head is simple and it is able to generate a smaller effective electric field, it is advantaged for the trend of miniaturization of pick-up head and capable of increasing the density of data on the disk.

Abstract: A polarized-dependent optical diffraction device includes a circular polarization beam generator and a diffraction grating. A diffraction grating is formed by a circular birefractive sheet having a corrugated surface with at least each groove filled with a mass of a material of a refractive index which is substantially equal to one of the circular birefractive indices. A circular polarization beam is supplied to the diffraction grating that the circularly-polarized beams traveling in both directions along a specific optical axis have different diffraction effects so as to enhance the utilization efficiency of the light. In particular, an external magnetic field is used to change the circular birefractive indices in such a manner diffraction efficiency is changed, featuring the merit of adjustability.

Abstract: A bifocal optical pickup head is disclosed for use in a optical pickup apparatus having a single objective lens, for generating two different focuses (bifocus) to access a compact disc (CD) and a digital versatile disc (DVD), which the thickness is different. When a beam passes through an optical element disclosed in the present invention, numerical aperture is controlled and spherical aberration is reduced by the optical element due to variations in optical path and radius. Therefore, after beams having different numerical apertures are focused by an objective lens, various focuses can be obtained.

Abstract: The present invention is an optical pick-up head with a single objective lens, which discloses an optical pick-up head that can retrieve data from CD and DVD with different thickness using a single objective lens and a special optical element on the optical path of the optical pick-up head. This optical element is a three-beam grating which is formed a reflective film thereon, for example, by coating a metal or dielectric layer to achieve the goal of controlling the numerical aperture. Thus, this invention provides a single objective lens optical pick-up head with simple structure, low cost, easy assembling, and applications to multi-wavelength systems.

Abstract: A bifocal optical pickup head is disclosed for use in a optical pickup apparatus having a single objective lens, for generating two different focuses (bifocus) to access a compact disc (CD) and a digital versatile disc (DVD), which the thickness is different. When a beam passes through an optical element disclosed in the present invention, numerical aperture is controlled and spherical aberration is reduced by the optical element due to variations in optical path and radius. Therefore, after beams having different numerical apertures are focused by an objective lens, various focuses can be obtained.

Abstract: A radio communication system includes a voice recognition system (221) for converting (400) a caller's voice message to a textual speech message. The textual speech message is then transmitted to an intended selective call radio (122). To perform these functions, the radio communication system includes a caller interface circuit (218), a transmitter (116), and a processor (222). To perform voice-to-text conversion, the processor is adapted to cause the caller interface circuit to sample a voice signal generated by the caller during a plurality of frame intervals, and to apply a Fourier transform thereto, thereby generating spectral data. The spectral data is subdivided into a plurality of bands. The spectral envelope of the spectral data is then filtered out to generate filtered spectral data. A Fourier transform is applied thereto to generate an autocorrelation function for each band.

Abstract: A radio communication system includes a voice recognition system (218), a transmitter (202) and a processing system (210). The voice recognition system is utilized for receiving caller initiated messages, and the transmitter is used for transmitting messages to a plurality of SCRs (selective call radios) (122) of the radio communication system. The processing system, which is coupled to the voice recognition system, and the transmitter, is adapted to cause the voice recognition system to convert a voice signal representative of a voice message originated by a caller of the radio communication system to a text message (401, 417), wherein the text message is intended for a SCR, to then generate a likelihood of success that the voice signal has been flawlessly converted to a text message, to have a human listen to an audible representation of the voice signal, and to cause the transmitter to transmit the text message to the SCR (432).

Abstract: An interactive method for composing an alphanumeric message by a caller using a telephone keypad includes storing (215) a lexical database (135) from which unigram probabilities, forward conditional probabilities, and backward conditional probabilities for a plurality of words can be recovered; storing a received sequence of key codes (405) representing a sequence in which keys on a telephone style keypad are keyed; generating a word trellis including candidate words (415) derived from the sequence and the lexical database; determining a most likely phrase (420) from the candidate words, the unigram probabilities, forward conditional probabilities, and backward conditional probabilities; generating a most likely message (425) from the most likely phrase and presenting the most likely message to the caller; and confirming that the most likely message is the alphanumeric message (430).

Abstract: A communication system includes a transmitter for transmitting messages to a plurality of receiving devices of the communication system, and a processing system. The processing system is adapted to convert a caller's voice message to a sequence of phonemes whereby the caller's voice message is intended for a receiving device. To accomplish the conversion, steps of Fourier transform, spectral subdivision, envelope filtering autocorrelation function determination of each subdivision, and voiceness determination for each subdivision are performed. The processing system is further adapted to generate a sequence of phoneme indexes and voice features corresponding to the sequence of phonemes, and to cause the transmitter to transmit the sequence of phoneme indexes to the receiving device for generating a voice signal representative of the caller's voice message. The voice features can include spectral features, average energy, duration, and pitch to improve the quality of the voice signal.