Patents Represented by Attorney, Agent or Law Firm Scott V. Lundberg
-
Patent number: 6835628Abstract: The present invention relates to an integrated circuit having a MOS capacitor. In one embodiment, a method of forming an integrated circuit comprises forming an oxide layer on a surface of a substrate, the substrate having a plurality of isolation islands. Each isolation island is used in forming a semiconductor device. Patterning the oxide layer to expose predetermined areas of the surface of the substrate. Depositing a nitride layer overlaying the oxide layer and the exposed surface areas of the substrate. Implanting ions through the nitride layer, wherein the nitride layer is an implant screen for the implanted ions. Using the nitride layer as a capacitor dielectric in forming a capacitor. In addition, performing a dry etch to form contact openings that extend through the layer of nitride and through the layer of oxide to access selected device regions formed in the substrate.Type: GrantFiled: November 5, 2001Date of Patent: December 28, 2004Assignee: Intersil Americas Inc.Inventor: James D. Beasom
-
Patent number: 6825532Abstract: A bonded semiconductor-on-insulator substrate for an integrated circuit. The bonded semiconductor-on-insulator substrate includes a wafer, a handle wafer and an insulating bond layer. The wafer has a first layer of monocrystalline semiconductor material adjacent a first surface of the wafer. The wafer also has a second layer of undamaged by implantation monocrystalline semiconductor material adjacent a second surface of the wafer. The wafer further has a substantially planar intrinsic gettering zone of substantially pure semiconductor material and active gettering sites positioned between the first and second layers formed by implanting ions of the semiconductor material through the first layer of monocrystalline semiconductor material. The insulating bond layer bonds the handle wafer to the first surface of the wafer.Type: GrantFiled: May 1, 2001Date of Patent: November 30, 2004Assignee: Intersil Americas Inc.Inventors: Jack H. Linn, William H. Speece, Michael G. Shlepr, George V. Rouse
-
Patent number: 6822314Abstract: An improved base for a NPN bipolar transistor. The base region is formed with Boron and Indium dopants for improved beta early voltage product and reduced base resistance.Type: GrantFiled: June 12, 2002Date of Patent: November 23, 2004Assignee: Intersil Americas Inc.Inventor: James D. Beasom
-
Patent number: 6822292Abstract: Apparatus and Methods for the self-alignment of separated regions in a lateral MOSFET of an integrate circuit. In one embodiment, a method comprising, forming a relatively thin dielectric layer on a surface of a substrate. Forming a first region of relatively thick material having a predetermined lateral length on the surface of the substrate adjacent the relatively thin dielectric layer. Implanting dopants to form a top gate using a first edge of the first region as a mask to define a first edge of the top gate. Implanting dopants to form a drain contact using a second edge of the first region as a mask to define a first edge of the drain contact, wherein the distance between the top gate and drain contact is defined by the lateral length of the first region.Type: GrantFiled: November 21, 2001Date of Patent: November 23, 2004Assignee: Intersil Americas Inc.Inventor: James D. Beasom
-
Patent number: 6822540Abstract: A method for tuning a cavity filter is provided. The cavity filter includes a plurality of tuning members. The method includes selecting a stored set of positional values for the tuning members, driving the tuning members of the cavity filter to the stored set of positional values, and further adjusting the position of the tuning members as necessary to achieve a desired frequency response for the cavity filter.Type: GrantFiled: October 26, 2001Date of Patent: November 23, 2004Assignee: ADC Telecommunications, Inc.Inventor: Hannu K. Impio
-
Patent number: 6822548Abstract: The present invention relates to inductors with improved inductance and quality factor. In one embodiment, a magnetic thin film inductor is disclosed. In this embodiment, magnetic thin film inductor includes a plurality of elongated conducting regions and magnetic material. The plurality of elongated conducting regions are positioned parallel with each other and at a predetermined spaced distance apart from each other. The magnetic material encases the plurality of conducting regions, wherein when currents are applied to the conductors, current paths in each of the conductors cause the currents to generally flow in the same direction thereby enhancing mutual inductance.Type: GrantFiled: February 25, 2004Date of Patent: November 23, 2004Assignee: Intersil Americas Inc.Inventors: Xingwu Wang, Chungsheng Yang
-
Patent number: 6812108Abstract: A low temperature coefficient resistor(TCRL) has some unrepaired ion implant damage. The damaged portion raises the resistance and renders the resistor less sensitive to operating temperature fluctuations. A polysilicon thin film low temperature coefficient resistor and a method for the resistor's fabrication overcomes the coefficient of resistance problem of the prior art, while at the same time eliminating steps from the BiCMOS fabrication process, optimizing bipolar design tradeoffs, and improving passive device isolation. A low temperature coefficient of resistance resistor (TCRL) is formed on a layer of insulation, typically silicon dioxide or silicon nitride, the layer comprising polysilicon having a relatively high concentration of dopants of one or more species. An annealing process is used for the implanted resistor which is shorter than that for typical prior art implanted resistors, leaving some intentional unannealed damage in the resistor.Type: GrantFiled: March 19, 2003Date of Patent: November 2, 2004Assignee: Intersil CorporationInventors: Donald Hemmenway, Jose Delgado, John Butler, Anthony Rivoli, Michael D. Church, George V. Rouse, Lawrence G. Pearce, George Bajor
-
Patent number: 6810041Abstract: A integrated access device in a communication network. The integrated access device in one embodiment includes a network port, a plurality of telephony ports, a data port and communication circuit. The network port is adapted to provide dynamic time division multiplex (TDM) interface to a communication network. The plurality of telephony ports are adapted to provide telephony service to subscriber premises equipment. The data port is adapted to provide digital subscriber line (DSL) service to subscriber premises equipment. The communication circuit is coupled to the network port, the plurality of telephony ports and the data port. Moreover, the communication circuit is adapted to carry voice and data signals between the network port and the plurality of telephony ports and the data port. In addition, the integrated access device is line powered over the network port.Type: GrantFiled: July 9, 2002Date of Patent: October 26, 2004Assignee: ADC DSL Systems, Inc.Inventors: Kenneth Lee Walker, III, Dieter H. Nattkemper, Robert S. Kroninger
-
Patent number: 6798024Abstract: A low temperature coefficient resistor (TCRL) has some unrepaired ion implant damage. The damaged portion raises the resistance and renders the resistor less sensitive to operating temperature fluctuations A polysilicon thin film low temperature coefficient resistor and a method for the resistor's fabrication overcomes the coefficient of resistance problem of the prior art, while at the same time eliminating steps from the BiCMOS fabrication process, optimizing bipolar design tradeoffs, and improving passive device isolation. A low temperature coefficient of resistance resistor (TCRL) is formed on a layer of insulation, typically silicon dioxide or silicon nitride, the layer comprising polysilicon having a relatively high concentration of dopants of one or more species. An annealing process is used for the implanted resistor which is shorter than that for typical prior art implanted resistors, leaving some intentional unannealed damage in the resistor.Type: GrantFiled: June 29, 2000Date of Patent: September 28, 2004Assignee: Intersil Americas Inc.Inventors: Donald Hemmenway, Jose Delgado, John Butler, Anthony Rivoli, Michael D. Church, George V. Rouse, Lawrence G. Pearce, George S. Bajor
-
Patent number: 6775807Abstract: A method of determining electrical parameters of inductive elements includes a novel technique of inverting an impedance matrix representative of said inductive circuit element. The method reduces model simulation time by a factor of 3000. In one embodiment, simulation time of a device model was reduced from 1 hour to less than 3 seconds. The method is suitable for use with circuit element modeling tools, circuit simulation environments, and antenna modeling systems. The method may be applied to inductors, transformers, antennas, etc.Type: GrantFiled: August 19, 2002Date of Patent: August 10, 2004Assignee: Intersil Americas Inc.Inventors: Rex Lowther, Yiqun Lin
-
Patent number: 6772382Abstract: A driver circuit for use on an integrated circuit tester. In one embodiment, the driver circuit has a timing circuit and a driver. The timing circuit has two or more inputs to receive data signals at a first frequency and at least one output. The timing circuit generates a control signal having a second higher frequency and outputs signals based on the data signals and the control signal such that the output signals are independent of the effects of timing skew and timing jitter of the data signals. The driver has at least one input coupled to the at least one output of the timing circuit to receive the output signals and couple the output signals to a device under test.Type: GrantFiled: May 2, 2001Date of Patent: August 3, 2004Assignee: Teradyne, Inc.Inventors: Scott D. Schaber, Scott C. Loftsgaarden
-
Patent number: 6765247Abstract: An integrated circuit having a MOS structure with reduced parasitic bipolar transistor action. In one embodiment, a MOS integrated circuit device comprises a substrate having a working surface, at least one body region and for each body region a source and a layer of narrow band gap material. Each body region is formed in the substrate proximate the working surface of the substrate. Each layer of narrow band gap material is positioned in a portion of its associated body region and proximate the working surface of the substrate. Each layer of narrow band gap material has a band gap that is narrower than the band gap of the substrate in which each of the body regions are formed. Each source region is formed in an associated body region. At least a portion of each source region is also formed in an associated layer of narrow band gap material.Type: GrantFiled: October 12, 2001Date of Patent: July 20, 2004Assignee: Intersil Americas, Inc.Inventor: James D. Beasom
-
Patent number: 6759719Abstract: A silicon semiconductor die comprises a heavily doped silicon substrate and an upper layer comprising doped silicon of a first conduction type disposed on the substrate. The upper layer comprises a well region of a second, opposite conduction type adjacent an edge termination zone that comprises a layer of a material having a higher critical electric field than silicon. Both the well region and adjacent edge termination zone are disposed at an upper surface of the upper layer, and an oxide layer overlies the upper layer and the edge termination zone. A process for forming a silicon die having improved edge termination. The process comprises forming an upper layer comprising doped silicon of a first conduction type on a heavily doped silicon substrate, and forming an edge termination zone that comprises a layer of a material having a higher critical electric field than silicon at an upper surface of the upper layer.Type: GrantFiled: December 20, 2002Date of Patent: July 6, 2004Assignee: Intersil CorporationInventors: Jun Zeng, Gary Mark Dolry, Praveen MurAleedharan
-
Patent number: 6756601Abstract: Apparatus and method for increasing the bandwidth of an optocoupler includes cascode coupling the optocoupler driver transistor with a buffer so as to reduce voltage variations across the driver transistor.Type: GrantFiled: July 16, 2002Date of Patent: June 29, 2004Assignee: ADC DSL Systems, Inc.Inventor: George Bertram Dodson, III
-
Patent number: 6728367Abstract: An apparatus and method provide for filtering of voiceband and specified tone frequencies of a mixed voice/data signal, such as an Asymmetric Digital Subscriber Line (ADSL) signal. A lowpass filter section passes voiceband content of the mixed signal and suppresses mixed signal content having frequencies falling within a databand of the mixed signal. A bandpass filter section is coupled to or integral with the lowpass filter section and passes the specified tone frequency, such as a metering or billing tone frequency. The lowpass and bandpass filter sections exhibit a combined frequency response that provides for a stopband between the voiceband and the metering tone frequency. The bandpass filter section effectively detunes a frequency response of the lowpass filter section to provide for the stopband.Type: GrantFiled: March 9, 2000Date of Patent: April 27, 2004Assignee: ADC Telecommunications, Inc.Inventor: Steven M. Swam
-
Patent number: 6724832Abstract: A digital television transmitter for an ATSC or NTSC signal includes a digital vestigial sideband modulator having a digital sinusoidal source. A digital multiplier arrangement multiplies a digital signal including the information in the digital television signal by a sequence derived by the digital sinusoidal source to derive plural orthogonally phased digital product signals. A digital lowpass filter arrangement passes low frequency components of the plural digital product signals and rejects high frequency components of the plural digital product signals. A signal combiner arrangement combines a carrier with signals containing information passed by the lowpass filter arrangement necessary to derive a vestigial sideband signal. The combiner arrangement includes at least one digital to analog converter that in different embodiments derives a vestigial sideband signal that modulates an I.F. or R.F. carrier.Type: GrantFiled: January 29, 1999Date of Patent: April 20, 2004Assignee: ADC Broadband Wireless Group, Inc.Inventor: David L. Hershberger
-
Patent number: 6703952Abstract: Testing of analog-to-digital and digital-to-analog converters formed in integrated circuits. In one embodiment, a method of testing an analog-to-digital (A/D) converter comprises applying an analog test signal of a first frequency to an input of the A/D converter. Sampling digital byte samples from an output of the A/D converter at a second sampling frequency and comparing select digital byte samples with each other. When the select digital byte samples match, storing a verify bit in a memory to verify the A/D converter is working. In another embodiment, a method of testing a digital-to-analog (D/A) comprises creating repeating digital byte samples with a logic circuit formed in the integrated circuit. Converting the repeating digital byte samples into an analog test signal with the D/A converter. Comparing the frequency of the analog test signal with the frequency of an expected analog signal to determine if the D/A converter is working.Type: GrantFiled: June 10, 2002Date of Patent: March 9, 2004Assignee: ADC DSL Systems, Inc.Inventors: L. Grant Giddens, Juan A. Espinoza
-
Patent number: 6701494Abstract: A method and system for performing simultaneous tests and avoiding task collisions using a hardware description language includes designating a timeslot for one or more of the simultaneous tests, associating the designated timeslot with one or more of the tasks to be performed in a test, determining if the designated timeslot is available before executing the tasks associated with timeslots and executing the tasks when the designated timeslots become available.Type: GrantFiled: May 1, 2002Date of Patent: March 2, 2004Assignee: ADC DSL Systems, Inc.Inventors: L. Grant Giddens, Ronald R. Munoz
-
Patent number: 6700472Abstract: The present invention relates to inductors with improved inductance and quality factor. In one embodiment, a magnetic thin film inductor is disclosed. In this embodiment, magnetic thin film inductor includes a plurality of elongated conducting regions and magnetic material. The plurality of elongated conducting regions are positioned parallel with each other and at a predetermined spaced distance apart from each other. The magnetic material encases the plurality of conducting regions, wherein when currents are applied to the conductors, current paths in each of the conductors cause the currents to generally flow in the same direction thereby enhancing mutual inductance.Type: GrantFiled: December 11, 2001Date of Patent: March 2, 2004Assignee: Intersil Americas Inc.Inventors: Xingwu Wang, Chungsheng Yang
-
Patent number: 6701472Abstract: There are disclosed methods and apparatus for testing memory components for faults, defects or the like, by generating a testing sequence that produces various bit combinations as well as current changes, that when coupled, stresses or fatigues the memory component, and allows for the evaluation of single bits. The testing sequence is provided in cycles, formed of complement word pairs of N bit words. The first, or initial, cycle typically includes a first word of all binary zeros. Successive or subsequent cycles include a shifted bit in each subsequent first word. The testing pattern is written into the memory component(s) under test and corresponding words are read from the memory component(s). The written and read words are then compared, with this comparison analyzed for detection of faults, defects or the like in the memory component(s).Type: GrantFiled: February 9, 2001Date of Patent: March 2, 2004Assignee: ADC Telecommunications Israel, Ltd.Inventor: Nava Haroosh