Patents by Inventor Stefan Graef
Stefan Graef has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7930219Abstract: A method and system for designing a probe card from data provided by prospective customers via the Internet is provided. Design specifications are entered into the system by prospective customers and compiled into a database. The collective feasibility of each set of design specifications is determined by an automated computer system and communicated to the prospective customer. If feasible, additional software enables prospective customers to create verification packages according to their respective design specifications. These verification packages further consist of drawing files visually describing the final design and verification files confirming wafer bonding pad data. Verification packages are reviewed and forwarded to an applications engineer after customer approval. An interactive simulation of probe card performance is also provided.Type: GrantFiled: September 22, 2009Date of Patent: April 19, 2011Assignee: FormFactor, Inc.Inventors: Benjamin N. Eldridge, Mark W. Brandemuehl, Stefan Graef, Yves Parent
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Publication number: 20100011334Abstract: A method and system for designing a probe card from data provided by prospective customers via the Internet is provided. Design specifications are entered into the system by prospective customers and compiled into a database. The collective feasibility of each set of design specifications is determined by an automated computer system and communicated to the prospective customer. If feasible, additional software enables prospective customers to create verification packages according to their respective design specifications. These verification packages further consist of drawing files visually describing the final design and verification files confirming wafer bonding pad data. Verification packages are reviewed and forwarded to an applications engineer after customer approval. An interactive simulation of probe card performance is also provided.Type: ApplicationFiled: September 22, 2009Publication date: January 14, 2010Inventors: Benjamin N. Eldridge, Mark W. Brandemuehl, Stefan Graef, Yves Parent
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Patent number: 7593872Abstract: A method and system for designing a probe card from data provided by prospective customers via the Internet is provided. Design specifications are entered into the system by prospective customers and compiled into a database. The collective feasibility of each set of design specifications is determined by an automated computer system and communicated to the prospective customer. If feasible, additional software enables prospective customers to create verification packages according to their respective design specifications. These verification packages further consist of drawing files visually describing the final design and verification files confirming wafer bonding pad data. Verification packages are reviewed and forwarded to an applications engineer after customer approval. An interactive simulation of probe card performance is also provided.Type: GrantFiled: August 15, 2006Date of Patent: September 22, 2009Assignee: FormFactor, Inc.Inventors: Benjamin N. Eldridge, Mark W. Brandemuehl, Stefan Graef, Yves Parent
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Publication number: 20060294008Abstract: A method and system for designing a probe card from data provided by prospective customers via the Internet is provided. Design specifications are entered into the system by prospective customers and compiled into a database. The collective feasibility of each set of design specifications is determined by an automated computer system and communicated to the prospective customer. If feasible, additional software enables prospective customers to create verification packages according to their respective design specifications. These verification packages further consist of drawing files visually describing the final design and verification files confirming wafer bonding pad data. Verification packages are reviewed and forwarded to an applications engineer after customer approval. An interactive simulation of probe card performance is also provided.Type: ApplicationFiled: August 15, 2006Publication date: December 28, 2006Inventors: Benjamin Eldridge, Mark Brandemuehl, Stefan Graef, Yves Parent
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Patent number: 7092902Abstract: A method and system for designing a probe card from data provided by prospective customers via the Internet is provided. Design specifications are entered into the system by prospective customers and compiled into a database. The collective feasibility of each set of design specifications is determined by an automated computer system and communicated to the prospective customer. If feasible, additional software enables prospective customers to create verification packages according to their respective design specifications. These verification packages further consist of drawing files visually describing the final design and verification files confirming wafer bonding pad data. Verification packages are reviewed and forwarded to an applications engineer after customer approval. An interactive simulation of probe card performance is also provided.Type: GrantFiled: March 26, 2004Date of Patent: August 15, 2006Assignee: FormFactor, Inc.Inventors: Benjamin N. Eldridge, Mark W. Brandemuehl, Stefan Graef, Yves Parent
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Publication number: 20040181486Abstract: A method and system for designing a probe card from data provided by prospective customers via the Internet is provided. Design specifications are entered into the system by prospective customers and compiled into a database. The collective feasibility of each set of design specifications is determined by an automated computer system and communicated to the prospective customer. If feasible, additional software enables prospective customers to create verification packages according to their respective design specifications. These verification packages further consist of drawing files visually describing the final design and verification files confirming wafer bonding pad data. Verification packages are reviewed and forwarded to an applications engineer after customer approval. An interactive simulation of probe card performance is also provided.Type: ApplicationFiled: March 26, 2004Publication date: September 16, 2004Inventors: Benjamin N. Eldridge, Mark W. Brandemuehl, Stefan Graef, Yves Parent
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Patent number: 6766499Abstract: A computer readable medium encoded with instructions for executing the steps of: receiving information about a driving cell from a layout tool, receiving information about an interconnect from a layout tool, determining buffer cell information based upon information about the driving cell and the interconnect by accessing a previously defined library lookup table, relaying the buffer cell information from the library look up table to the layout tool.Type: GrantFiled: April 5, 2001Date of Patent: July 20, 2004Assignee: LSI Logic CorporationInventors: Benjamin Mbouombouo, Stefan Graef, Juergen Lahner
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Patent number: 6714828Abstract: A method and system for designing a probe card from data provided by prospective customers via the Internet is provided. Design specifications are entered into the system by prospective customers and compiled into a database. The collective feasibility of each set of design specifications is determined by an automated computer system and communicated to the prospective customer. If feasible, additional software enables prospective customers to create verification packages according to their respective design specifications. These verification packages further consist of drawing files visually describing the final design and verification files confirming wafer bonding pad data. Verification packages are reviewed and forwarded to an applications engineer after customer approval. An interactive simulation of probe card performance is also provided.Type: GrantFiled: September 17, 2001Date of Patent: March 30, 2004Assignee: FormFactor, Inc.Inventors: Benjamin N. Eldridge, Mark W. Brandemuehl, Stefan Graef, Yves Parent
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Patent number: 6687661Abstract: When designing an electronic circuit to be implemented on an integrated circuit die which includes several metal layers, a technology-independent description of a system is generated, the technology-independent description specifying a signal and a selected metal layer for the signal. Also, an electronic circuit description of a system is synthesized from a technology-independent description of the system. Specifically, a technology-independent description of the system is input, the technology-independent description specifying a signal and a metal layer attribute for the signal. Electronic components are selected from a library based on the technology-independent description and interconnections between the electronic components are specified. A metal layer is then specified for an interconnection corresponding to the signal specified in the technology-independent description based on the metal layer attribute specified in the technology-independent description.Type: GrantFiled: May 26, 1998Date of Patent: February 3, 2004Assignee: LSI Logic CorporationInventors: Stefan Graef, Emery Sugasawara
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Patent number: 6634014Abstract: Delay and/or load estimation is performed prior to physical layout in an integrated circuit (IC) design process. Initially, a description of the IC design is obtained, the description being in a hardware description language (HDL). Floor planning is then performed based on the HDL description, and buffers are inserted into the IC design based on such floor planning. Finally, delays and/or loads are estimated in the IC design while taking into account the effect of the buffers. The buffers are inserted in the foregoing processing based on anticipated processing later in the IC design process.Type: GrantFiled: December 12, 2000Date of Patent: October 14, 2003Assignee: LSI Logic CorporationInventors: Grant Lindberg, Stefan Graef
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Patent number: 6598213Abstract: A method of characterizing worst case timing performance includes the steps of receiving as input a netlist of a core, performing a parasitic extraction on the netlist to generate a first standard parasitic extraction format file for a first assumed top metal layer over the core, performing a parasitic extraction on the netlist to generate a second standard parasitic extraction format file for a second assumed top metal layer over the core, calculating a minimum timing value from each delay arc of the first standard parasitic extraction format file, calculating a maximum timing value from each delay arc of the second standard parasitic extraction format file, and merging the minimum timing value calculated from each delay arc of the first standard parasitic extraction format file and the maximum timing value of each delay arc calculated from the second standard parasitic extraction format file to generate an output file.Type: GrantFiled: April 16, 2001Date of Patent: July 22, 2003Assignee: LSI Logic CorporationInventor: Stefan Graef
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Patent number: 6546538Abstract: Provided is an integrated circuit (IC) device that includes a semiconductor substrate on which electronic components are formed and multiple metal layers on which wires are routed. Formed on the multiple metal layers is a capacitor that includes a first plate formed on a first metal layer and a second plate formed on a second metal layer that is adjacent to the first metal layer. An area in which the first plate and the second plate overlap has a width of at least twice the width of a typical wire on the IC device. Also provided is a technique for supplying power and ground to locations on an integrated circuit (IC) device that has multiple metal layers for routing wires and a substrate for forming electronic components. Initially, the technique identifies an overlap area where two of the multiple metal layers that are adjacent to each other have open space. A plate is then formed in the overlap area of each of the two metal layers so as to construct a capacitor.Type: GrantFiled: March 10, 2000Date of Patent: April 8, 2003Assignee: LSI Logic CorporationInventors: Shalini Rubdi, Stefan Graef, Juergen Lahner
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Publication number: 20030055736Abstract: A method and system for designing a probe card from data provided by prospective customers via the Internet is provided. Design specifications are entered into the system by prospective customers and compiled into a database. The collective feasibility of each set of design specifications is determined by an automated computer system and communicated to the prospective customer. If feasible, additional software enables prospective customers to create verification packages according to their respective design specifications. These verification packages further consist of drawing files visually describing the final design and verification files confirming wafer bonding pad data. Verification packages are reviewed and forwarded to an applications engineer after customer approval. An interactive simulation of probe card performance is also provided.Type: ApplicationFiled: September 17, 2001Publication date: March 20, 2003Applicant: FormFactor, Inc.Inventors: Benjamin N. Eldridge, Mark W. Brandemuehl, Stefan Graef, Yves Parent
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Patent number: 6532576Abstract: A method for characterizing cell interconnect delay is disclosed that may be included in a library for use with logic design tools. A method of characterizing cell interconnect delay includes the steps of (a) receiving as inputs a plurality of input ramptimes and a plurality of interconnect lengths for a selected cell, and (b) calculating an output ramptime and a total cell delay including a cell delay and an interconnect delay for each of the plurality of input ramptimes for each of the plurality of interconnect lengths for the selected cell from the inputs.Type: GrantFiled: March 7, 2001Date of Patent: March 11, 2003Assignee: LSI Logic CorporationInventors: Benjamin Mbouombouo, Stefan Graef, Juergen Lahner
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Patent number: 6502230Abstract: The present invention is directed to a system and method of modeling electrical circuits. The present invention may provide improved software for predicting microchip interconnect delays, and in general for an improved semiconductor manufacturing models. Further, the invention may provide for accurate prediction of resistance, capacitance and inductance for interconnections in a semiconductor, allowing for both environmental values and process variations.Type: GrantFiled: May 2, 2001Date of Patent: December 31, 2002Assignee: LSI Logic CorporationInventors: Stefan Graef, Sheela Shreedharan
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Patent number: 6457160Abstract: Provided is a technique for circuit delay prediction in which blocks (preferably, non-overlapping blocks) are specified, each of the blocks including a portion of the circuit. Delay calculation collars (DCCs) are then defined for the blocks, the DCCs including complete dependency information required to calculate delay within the blocks. Next, delay is calculated for the blocks based on the DCCs and delay is calculated for the circuit based on the DCCs. The DCCs are then modified as necessary based on results of either or both of the delay calculation for the blocks or the circuit. The delay calculation and DCC modification steps are then repeated.Type: GrantFiled: June 13, 2000Date of Patent: September 24, 2002Assignee: LSI Logic CorporationInventors: Stefan Graef, Floyd Kendrick
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Patent number: 6305001Abstract: A method for planning the clock distribution network in the conceptual design phase of an ASIC device is provided herein that comprises partitioning the technology-independent description of the device into partitioned groups based on the clocking time of the clock recipients in each of the partitioned groups. In addition, a clock budgeting plan is generated by creating target timing groups and assigning each of the partitioned groups to one of the target timing groups based on the clocking time of the clock recipients in each of the partitioned groups. The clock recipients in each of the target timing groups clock at a substantially same time and clock recipients in different target groups clock at different times.Type: GrantFiled: June 18, 1998Date of Patent: October 16, 2001Assignee: LSI Logic CorporationInventor: Stefan Graef
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Patent number: 6189131Abstract: A method for assigning signals to specific metal layers through the use of interconnect wire load models that are metal layer dependent. The method allows synthesis and layout tools to route signal wires on select metal layers at an early stage in the design process. A technology library for use in designing integrated circuits is provided. In addition to traditional library components such as logic gate information, the technology library includes routing wire load models that are metal layer dependent. The wire load information reflects the electrical properties of signal wires formed on different metal layers, and provides more accurate timing estimates than generic wire delay values. The additional information influences the delay calculations of the synthesis process in such a way that the delay a signal encounters on a specific metal layer can be approximated very closely. Of significance to the present invention, a wire-metal layer attribute file is compiled by the synthesis process.Type: GrantFiled: January 14, 1998Date of Patent: February 13, 2001Assignee: LSI Logic CorporationInventors: Stefan Graef, Emery O. Sugasawara
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Patent number: 6184711Abstract: A low impact buffer structure disposed in unused silicon area in a signal line routing channel between logic cell rows of an integrated circuit. In a buffer cell according to the invention, power to the buffer is provided by the power supply rails of one or more nearby logic cell rows. Both the connections to the supply rails and the connections between the transistors of the buffer cell are constructed of a polysilicon material and/or lower metal layer. In this manner, the buffer cell does not significantly impact the routing of metal signal lines in the signal line routing channel. In addition, the buffer cells can be arranged in a “staggered” configuration wherein separate buffers are provided in individual routing tracks of a signal line routing channel, further reducing the possibility of interference with normal signal routing.Type: GrantFiled: May 28, 1998Date of Patent: February 6, 2001Assignee: LSI Logic CorporationInventors: Stefan Graef, Oscar M. Siguenza
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Patent number: 6131151Abstract: Methods and apparatus are described for managing high-bandwidth incoming digital data streams, such as MPEG encoded data streams, while reducing memory requirements. Frames of incoming data are divided into smaller slices, for example four slices per frame. A sequencing memory is used to store frame store memory addresses pointing to locations in the frame store buffer where slices of data are stored. As incoming data is stored in the frame buffer, corresponding start location addresses are stored in the sequencing memory, and corresponding bits in a status register are marked as busy. Conversely, as data is read out of the frame store for decoding or reconstruction, the corresponding bit in the status register is changed to the free status, as each slice of data is processed. This procedure and corresponding architecture reduces frame store memory requirements.Type: GrantFiled: November 12, 1997Date of Patent: October 10, 2000Assignee: LSI Logic CorporationInventor: Stefan Graef