摘要:
An array of anti-fuse cells forming rows and columns of a matrix is described. The anti-fuse cell includes an MOS capacitor connected to a source of high voltage which is capable of rendering the capacitor permanently conductive. A first voltage limiting transistor connects the free end of the MOS capacitor to a second transistor. An address decoder provides address signals to a source and gate of the second transistor within the cell. The MOS capacitor is rendered permanently conductive when the first and second transistors are rendered conductive. The high voltage is confined to the MOS capacitor, which is fused through the high current being drawn through the capacitor by the first and second transistors. Other components on the integrated circuit carrying the array of fusible cells are maintained free of any high voltage.
摘要:
A decoupling capacitor is provided for a semiconductor device and may include a first low dielectric insulator layer and a low resistance conductor formed into at least two interdigitized patterns on the surface of the first low dielectric insulator in a single interconnect plane. A high dielectric constant material may be provided between the two patterns. A circuit for testing a plurality of these capacitors is also provided which includes a charge monitoring circuit, a coupling circuit and a control circuit.
摘要:
An integrated circuit and fabrication method for an antifuse structure that includes a shallow trench oxide isolation region disposed in a silicon substrate, the oxide in the trench having a top surface recessed below the surface of the substrate to form sharp corners at each side of the trench. The substrate includes diffusion regions adjacent to the sharp corners, electrical insulation layers over the diffusion regions, and an electrical conductor is disposed over the recessed oxide in the trench. When voltage is applied on the electrical conductor, a high field point is produced at the sharp corners causing the electrical insulation layer at the corners to break down and create a short circuit between the electrical conductor and the diffusions, thus providing a fuse function.
摘要:
A decoupling capacitor is provided for a semiconductor device and may include a first low dielectric insulator layer and a low resistance conductor formed into at least two interdigitized patterns on the surface of the first low dielectric insulator in a single interconnect plane. A high dielectric constant material may be provided between the two patterns. A circuit for testing a plurality of these capacitors is also provided which includes a charge monitoring circuit, a coupling circuit and a control circuit.
摘要:
A decoupling capacitor is provided for a semiconductor device and may include a first low dielectric insulator layer and a low resistance conductor formed into at least two interdigitized patterns on the surface of the first low dielectric insulator in a single interconnect plane. A high dielectric constant material may be provided between the two patterns. A circuit for testing a plurality of these capacitors is also provided which includes a charge monitoring circuit, a coupling circuit and a control circuit.
摘要:
A decoupling capacitor is provided for a semiconductor device and may include a first low dielectric insulator layer and a low resistance conductor formed into at least two interdigitized patterns on the surface of the first low dielectric insulator in a single interconnect plane. A high dielectric constant material may be provided between the two patterns. A circuit for testing a plurality of these capacitors is also provided which includes a charge monitoring circuit, a coupling circuit and a control circuit.
摘要:
A way of dynamically modifying error recovery on a communications controller to operate at the lowest power mode allowed by current error rate conditions. When operating conditions are good and a small number of errors are detected, a low power error detection/correction mode is entered saving battery life. The low power error correction mechanism runs at a slower frequency and lower power than the high power mechanism and maintains the same data rate for the controller, thus saving power. Selecting the controller error (power) mode may be externally, such as by a person using a control dial on a cellular telephone when the voice data gets too noisy. Alternatively, the selection can be automatic, a critical error level detector internally making the selection.
摘要:
An IC chip comprising, a nearby or remote source capable of particle emissions; circuitry formed in the IC chip that is adversely affected by impacts of particle emissions from said source; and a particle detector formed in the IC chip between the circuitry and source for detecting said particle emissions. In one embodiment of the present invention, the source comprises a solder ball that is formed on a surface of the IC chip, and the solder ball is capable of emitting alpha-particles. The particle emissions detector of the present invention is a reverse biased Schottky diode. The IC chip is formed by (a) providing an IC chip having at least one layer of particle sensitive circuitry formed therein; (b) forming another layer having at least one particle sensor region situated therein on a surface of said IC chip; and (c) optionally, forming at least one particle emission source over said another layer.
摘要:
A significant and very effective decoupling capacitor and heat sink combination that, in a single structure provides both a heat sink and a decoupling capacitor in close proximity to the active circuit on the chip requiring either heat sinking or decoupling capacitance or both. This is achieved by forming on a semiconductor chip, having a buried oxide layer therein, an integrated high-performance decoupling capacitor that uses a metallic deposit greater than 30 microns thick formed on the back surface of the chip and electrically connected to the active chip circuit to result in a significant and very effective decoupling capacitor and heat sink in close proximity to the active circuit on the chip requiring such decoupling capacitance and heat sinking capabilities. The decoupling capacitance can use the substrate of the chip itself as one of the capacitive plates and a formed metallic deposit as the second capacitive plate which also serves as a heat sink for the active circuit formed in the chip. The structure thus provides both a significant and effective decoupling capacitance in close proximity to the active circuit on the chip requiring such decoupling capacitance as well as providing improved heat sinking for the decoupled active circuit.
摘要:
A method and apparatus are provided for managing cache allocation for a plurality of data types in a unified cache having dynamically allocable lines for first type data and for second type data. Cache allocation is managed by counting misses to first type data and misses to second type data in the unified cache, and by determining when a difference between a number of first type data misses and a number of second type data misses crosses a preselected threshold. A replacement algorithm of the unified cache then is adjusted in response to the detected crossing of the preselected threshold, the adjusting step including increasing a replacement priority of the first type data lines in the cache. The replacement algorithm preferably is an LRU algorithm wherein the adjusting step includes incrementing an age indication of the first type data lines. Hardware for implementing the inventive cache allocation management method comprises a miss counter configured to increment its count in response to a miss to first type data signal on a first counter input and to output a first logic state on a first counter output when the counter's count exceeds a first predetermined count. A priority adjustment circuit coupled to the first counter output increases the replacement priority of the first type data relative to the replacement priority of the second type data in response to the first logic state output by the miss counter.