Patents Represented by Attorney, Agent or Law Firm Tamiz Khan
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Patent number: 6831352Abstract: An improved lead frame structure for use in a semiconductor package, including: a plurality of leads; a paddle structure electrically isolated from the leads, the paddle structure including at least one lower paddle section having a first top surface to which a die may be attached, at least one mesa section disposed proximate the paddle section and having a second top surface disposed at a different elevation than the first top surface, the lower paddle section and the mesa section being joined by a wall section; and a plurality of tie bars attached to the paddle structure for supporting the paddle structure; whereby contact pads of a die attached to the first top surface may be electrically connected to the second top surface and to the leads prior to encapsulation thereof. A plurality of tie bars extends from opposite edges of the paddle structure, the tie bars providing for stabilizing the paddle structure during package fabrication.Type: GrantFiled: October 22, 1999Date of Patent: December 14, 2004Assignee: Azimuth Industrial Company, Inc.Inventor: Johnson Tsai
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Patent number: 6366167Abstract: The present invention discloses a low voltage rail-to-rail CMOS input stage. The input stage includes a differential pail of P-channel metal oxide semiconductor field effect (PMOS) transistors, which produces differential output current signal. The input stage further includes a pair of N-channel depletion-mode metal oxide semiconductor field effect (NMOS) transistors, coupled to the bulk terminals of the differential pair of PMOS transistors, for receiving an input signal. The depletion-mode NMOS transistors further act as source follower devices to drive the bulk terminals of the differential pair of PMOS transistors.Type: GrantFiled: February 29, 2000Date of Patent: April 2, 2002Assignees: Gain Technology Corporation, Seiko Instruments, Inc.Inventor: Troy L. Stockstad
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Patent number: 6343129Abstract: A sonic actuator including a multi-layer membrane having an elastomeric dielectric polymer layer with a first surface and a second surface, a first compliant electrode layer contacting the first surface of the polymer layer, and a second compliant electrode layer contacting the second surface of the polymer layer. The actuator further includes a support structure in contact with the sonic actuator film. Preferably, the dielectric polymer is selected from the group consisting essentially of silicone, polyurethane fluorosilicone, fluoroelastomer, natural rubber, polybutadiene, nitrile rubber, isoprene, and ethylene propylene diene. Also preferably, the compliant electrode layer is made from the group consisting essentially of graphite, carbon, and conductive polymers. The support structure can take the form of grid having a number of circular apertures.Type: GrantFiled: July 19, 1999Date of Patent: January 29, 2002Assignee: SRI InternationalInventors: Ronald E. Pelrine, Roy D. Kornbluh, Joseph S. Eckerle
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Patent number: 6326982Abstract: A client system and a dedicated server are provided, the client system having an internet module providing communication with the server, a television tuner operative to receive a plurality of video channels carrying video data, and a video processing unit operative to provide a video output signal for displaying images on a television.Type: GrantFiled: June 24, 1999Date of Patent: December 4, 2001Assignee: Enreach Technology, Inc.Inventors: Bo Wu, Guohong Xu
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Patent number: 6274509Abstract: A method of planarizing a layer of dielectric material is disclosed herein that is particularly suitable for planarizing inter-layer-dielectrics (ILD) or inter-metal-dielectrics (IMD). The planarizing method comprises the steps of depositing a layer of sacrificial oxide over the dielectric material, depositing a layer of amorphous silicon over the sacrificial oxide layer by either sputtering or plasma enhanced chemical vapor deposition (PECVD) at a temperature less than about 500 degrees Celsius, performing a first chemical-mechanical polishing of the amorphous silicon layer to form a self-aligned mask for a subsequent etching step, etching a portion of the sacrificial oxide layer to form a channel therein, and performing a second chemical-mechanical polishing to remove the remaining amorphous silicon layer and the remaining sacrificial oxide, and to substantially planarize the underlying dielectric material.Type: GrantFiled: January 28, 1999Date of Patent: August 14, 2001Assignee: Mosel Vitelic, Inc.Inventors: Tzung-Rue Hsieh, Wen-Wei Lo
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Patent number: 6275630Abstract: An optical multiplexing and demultiplexing device including a fiber mounting assembly for aligning optical fibers, a set of collimating and focusing optics, a transmission grating element, and a mirror element. The fiber mounting assembly alignment element aligns a series substantially close-spaced optical fibers with their ends flush and assembled in a substantially straight line. The optical fibers are either multi-mode or single mode communication fibers capable of transmitting optical wavelengths with substantially high transmittance. The set of collimating and focusing optics, preferably a lens (or mirror) system that contains two (2) or more elements, may be made from optical glasses with uniform refractive indices, optical glasses with gradient indices, plastic optical elements, or diffractive lenses.Type: GrantFiled: November 17, 1998Date of Patent: August 14, 2001Assignee: BaySpec, Inc.Inventors: Wei Yang, Shu Zhang