Abstract: A semiconductor device which includes a P-well which is underneath NMOS fingers. The device includes an N-well ring which is configured so that the inner P-well underneath the NMOS fingers is separated from an outer P-well. The inner P-well and outer P-well are connected by a P-substrate resistance which is much higher than the resistance of the P-wells. A P+-diffusion ring surrounding the N-well ring is configured to connect to VSS, i.e., P-taps.
Abstract: A memory circuit generally comprising a bit cell, a sense amplifier, and a control circuit. The bit cell may be configured to generate a bit signal. The sense amplifier may be configured to generate a reset signal in response to sensing the bit signal. The control circuit may be configured to (i) set a control latch in response to a detection signal and (ii) reset the control latch in response to the reset signal, wherein the control latch is set while both the detection signal and the reset signal are in an asserted state.
Abstract: An improved memory cell architecture is provided herein for reducing, or altogether eliminating, chip-level routing congestion in System-on-Chip environments. Though only a few embodiments are provided herein, features common to the described embodiments include: the formation of bitlines in a lower-level metallization layer of the memory array, and the use of word lines and ground supply lines, both formed in inter-level metallization layer(s) of the memory array, for effective shielding of the bitlines against routing signals in the chip-level routing layer.
Abstract: A data bus bridge circuit and method are provided for coupling a slave device with a data bus in a system in which data words are transferred between a master device and the slave device over the data bus. The bridge circuit removes master-induced stalls of burst transfers by converting those burst transfers into a plurality of separate, independent sub-bursts.
Abstract: An apparatus for controlling the substrate temperature of a substrate during processing of the substrate at a process energy. A chuck temperature input receives temperature measurements from temperature sensors at a substrate chuck, and a temperature set point input receives temperature set points. The temperature set points define a range of temperatures within which the apparatus maintains the substrate temperature. A chuck temperature controller output sends control signals to a chuck temperature controller, which signals are operable to selectively increase and decrease the chuck temperature. A process energy output sends control signals that are operable to selectively increase and decrease the process energy during the processing of the substrate. A controller compares the temperature measurements received from the temperature sensors at the substrate chuck through the chuck temperature input to the temperature set points received through the temperature set point input.
Abstract: A self-aligning memory cell design is provided to allow testing of transistors in every cell of a memory circuit. A test array of these cells is fabricated with contact pads in each cell for specific components in the cell. Then, metal lines are provided to couple the contact pads in the test array. The whole test array is then probed via these metal lines. Tests may then be performed to detect random and systematic transistor degradation electrically for all cells in the circuit. Different components in the memory design may be tested by providing contact pads for the components of interest and providing metal lines coupling the contact pads.
Type:
Grant
Filed:
May 27, 2003
Date of Patent:
December 20, 2005
Assignee:
LSI Logic Corporation
Inventors:
Franklin L. Duan, Subramanian Ramesh, Ruggero Castagnetti
Abstract: A shift register is provided to monitor the difference between the read and write pulses to an elasticity buffer. The shift register essentially eliminates the need for any math functions in the elasticity buffer management logic. The shift register is as wide as the elasticity buffer is deep. In other words, for every word in the elasticity buffer, the shift register has a corresponding bit. Each time a word is written into the elasticity buffer without a simultaneous corresponding read, a value of “1” is shifted from a first end into the shift register, indicating that a space has been taken in the elasticity buffer. For every word read out of the elasticity buffer without a simultaneous corresponding write, a value of “0” (zero) is shifted from a second end of the shift register, indicating that one more space is available.
Abstract: Test structures are provided for accurately quantifying shared contact resistance. The test structures are built based upon an actual memory cell, which is self-aligning to allow shared contact chains through an array of test cells. A main array of test cells is built to provide a chain of shared contact resistance. Using the main array of test cells, a resistance in the shared contact chain may be measured. Supplemental arrays of test cells is built to provide a chain of poly side resistance, a chain of island side resistance, a chain of island connection line resistance, and a chain of poly connection resistance. A tester measures resistance using the test structures and uses the values to accurately determine shared contact resistance.
Type:
Grant
Filed:
December 4, 2003
Date of Patent:
December 20, 2005
Assignee:
LSI Logic Corporation
Inventors:
Franklin Duan, Subramanian Ramesh, Ruggero Castagnetti
Abstract: A mode register is created during the design of a complex, multi-mode electronic circuit. The mode register may contain connections to various switches, clocks, multiplexers, or other portions of the circuit that may have settings necessary to operate the circuit in different modes. The mode register may be used during circuit simulation by setting the mode register to a certain setting when running a static timing analysis script or other type of circuit simulation. After the circuit design is completed and before manufacturing the circuit, the mode register is disabled or removed from the circuit.
Abstract: An embedded memory on an integrated circuit chip is capable of being isolated from other on chip and off chip circuitry during power failure modes on the integrated circuit chip. The embedded memory preferably has its own external power supply. When power on chip fails or falls below a threshold level, input to and output from the embedded memory is prohibited by CMOS isolation cells. The CMOS isolation cells are controlled by enable signals and the power level of other power supplies within the integrated circuit.
Abstract: A method for fabricating a semiconducting device on a substrate, where the improvement includes forming a strained silicon germanium channel layer on the substrate. A gate insulation layer is formed on top of the strained silicon germanium channel layer, at a temperature that does not exceed about eight hundred centigrade. A gate electrode is formed on top of the gate insulation layer, and the gate electrode is patterned. A low dose drain dopant is impregnated into the substrate, and activated with a first laser anneal. A source-drain dopant is impregnated into the substrate, and activated with a second laser anneal. After the step of activating the low dose drain dopant with the first laser anneal, an insulating layer is formed around the gate electrode, at a temperature that does not exceed about eight hundred centigrade, and a spacer is formed around the gate electrode. The spacer is formed of a material that is reflective to the second laser anneal.
Abstract: An apparatus comprising an analog circuit, a first digital circuit, and a second digital circuit. The analog circuit may be configured to generate a plurality of samples of an input signal in response to a plurality of phases of a reference clock. The first digital circuit may be configured to generate (i) one or more data signals, (ii) a first strobe signal, and (iii) a second strobe signal in response to the plurality of samples, the plurality of phases, and a correction signal. The second digital circuit may be configured to generate the correction signal and a width signal in response to (i) the one or more data signals, (ii) the first strobe signal, and (iii) the second strobe signal.
Abstract: For use in a wide-issue pipelined processor, a mechanism for, and method of, reducing pipeline stalls between conditional branches and a digital signal processor (DSP) incorporating the mechanism or the method. In one embodiment, the mechanism includes: (1) a mispredict program counter (PC) generator that generates a mispredict PC value for each conditional branch instruction in a pipeline of the processor and (2) mispredict PC storage, coupled to the mispredict PC generator, that stores the mispredict PC value at least until a resolution of the conditional branch instruction occurs and makes the mispredict PC value available to a PC of the processor if the resolution results in a mispredict condition. The mispredict PC storage includes a mispredict PC queue and a number of staging registers wherein the mispredict PC queue has at least as many stages as the number of staging registers.
Abstract: A method and system for communicating across heterogeneous networks having components with dissimilar data structure definitions is disclosed in which determinations are made as to whether the sender is up-level or down-level and whether the up-level data structure size is greater or lesser than the down-level data structure size. According to these determinations, data fields for the decoded data structure may skip data or assign default values. The invention reduces upgrade costs and system down time.
Abstract: An integrated circuit (IC) and methods of manufacturing and operating ICs. In one embodiment, the IC includes: (1) a plurality of interchangeable hard macrocells, (2) at least one programmable logic block (PLB), (3) a bus intercoupling said plurality and said at least one programmable logic block and (4) a self-repair program, associated with said at least one programmable logic block, that causes said PLB to test at least some of said plurality and place at least a functioning one of said plurality into an operational status.
Abstract: A method, rules and directives engine, and a computer program product that simplifies the design of semiconductor products. Starting with an application set which is a partially manufactured semiconductor platform that is correct-by-construction, as a chip designer inserts her/his own designs into the platform, a system of rules and directives check each input to ensure that naming conventions are followed, that the input is compatible with all other components to which it is connected, than the input has the necessary and appropriate power, signals levels, clocks, memories. As a component is generated from a configurable transistor fabric that is part of the application set, the parameters of the configured component are inserted and checked for the power, signal, clocking, and memory compatibility, e.g., I/O buffers are verified for proper signal levels, differential signals, power plane compatibility, etc.
Type:
Application
Filed:
December 20, 2004
Publication date:
December 8, 2005
Applicant:
LSI LOGIC CORPORATION
Inventors:
Todd Youngman, John Nordman, Scott Senst
Abstract: During the design of semiconductor products which incorporates a user specification and an application set, the application set being a partially manufactured semiconductor platform and its resources, a template engine is disclosed which uses a simplified computer language having a character whereby data used in commands identified by the character need only be input once, either by a user or by files, and that data, after it has been verified to be correct, is automatically allocated to one or more templates used to generate shells for the specification of a final semiconductor product. Data must be correct and compatible with other data before it can be used within the template engine and the generated shells; indeed the template engine cooperates with a plurality of rules and directives to verify the correctness of the data.
Abstract: A clock integration method, tool, and a computer program product that captures, creates, and seamlessly integrates a clock specification to achieve a correct-by-construction design flow of a semiconductor product, such as an ASIC, from a partially manufactured semiconductor platform. The clocking elements of the design flow are combined and displayed to a chip designer in a plurality of context-driven user interfaces and views. Within each view, the details of the clock specification are presented in the context of the information to guide a chip designer to make relevant and correct determinations, e.g., if the context is a high level overview of the logic of the intended semiconductor product, then only the high level parameters, such as source, frequency, path of the clocks signals through the high level modules, etc. are seen. When a chip designer wants more or less detailed information, she/he need only zoom in/zoom out through the plurality of views of the design flow.
Abstract: A system for, and method of, reference-modeling a processor design. In one embodiment, the system includes: (1) an architecture database that contains specifications regarding the processor design that include: instruction set specifications, architectural resource specifications, pipeline specifications and connectivity specifications, (2) a simulation subsystem that draws selected portions of the specifications to simulate and test the processor design and (3) a documentation subsystem that draws other selected portions of the specifications to document and register-model the processor design, changes in the specifications being propagated to the architecture database.
Type:
Grant
Filed:
April 7, 2003
Date of Patent:
December 6, 2005
Assignee:
LSI Logic Corporation
Inventors:
Tuan Dao, Seshagiri P. Kalluri, Shannon A. Wichman
Abstract: The present invention provides a method for capturing data suitable for creating a Serial ATA eye diagram. A Serial ATA host controller including a first and a second Serial ATA ports is powered up, where receive lines of the first Serial ATA port are short-circuited to receive lines of the second Serial ATA port, and the first Serial ATA port is communicatively coupled to a Serial ATA drive. An initialization pattern from the Serial ATA drive is received by the first and the second Serial ATA ports. An ALIGN/SYNC pattern is transmitted over transmit lines of the second Serial ATA port. Data transmitted over the transmit lines of the second Serial ATA port is captured using a high impedance differential probe and an oscilloscope. The captured data may be used to create a Serial ATA eye diagram for the second Serial ATA port on the oscilloscope.