摘要:
An accelerator assembly includes a first chip and a second chip. An acceleration channel is formed into a surface of a first side of the first chip. The first side of the first chip is covalently bonded to a first side of the second chip such that the channel is a tubular void between the first and second chips. The channel has a tubular inside sidewall surface, substantially no portion of which is a metal surface. The channel has length-to-width ratio greater than five, and a channel width less than one micron. There are many substantially identical channels that extend in parallel between the first and second chips. In one specific example, the assembly is part of a Direct Write On Wafer (DWOW) printing system. The DWOW printing system is useful in semiconductor processing in that it can direct write an image onto a 300 mm diameter wafer in one minute.
摘要:
A capacitive interposer (caposer) is disposed inside an integrated circuit package between a die and an inside surface of the package. Conductive layers within the caposer constitute a bypass capacitor. In a through-hole caposer, micro-bumps on the die pass through through-holes in the caposer and contact corresponding landing pads on the package. As they pass through the caposer, power and ground micro-bumps make contact with the plates of the bypass capacitor. In a via caposer, power and ground micro-bumps on the die are coupled to power and ground landing pads on the package as well as to the plates of the bypass capacitor by power and ground vias that extend through the caposer. In signal redistribution caposer, conductors within the caposer redistribute signals between die micro-bumps and package landing pads. In an impedance matching caposer, termination structures within the caposer provide impedance matching to a printed circuit board trace.
摘要:
An apparatus includes a volume of insulator disposed over a top surface of a semiconductor substrate, a tube of soft dielectric, and a metal conductor. The insulator has a hardness of more than approximately three gigaPascals (gPa) and the soft dielectric has a hardness of less than three gPa. The tube of soft dielectric and the metal conductor are both embedded within the volume of insulator. The tube defines a central volume and the metal conductor extends in a direction through the central volume for a distance of at least one inch. The metal conductor is encircled by the soft dielectric when the apparatus is viewed in a cross-sectional plane perpendicular to the direction. The metal conductor may include a plurality of bend portions. The metal conductor does not break when the apparatus is temperature cycled over a range from zero to eighty five degrees Celsius.
摘要:
A multiple-layer signal conductor has increased surface area for mitigation of skin effect. Parallel extending elongated strips of conductive material are placed in parallel layers and are separated by a thin layer of dielectric. The elongated strips are conductively connected to one another by regularly spaced vias such that a single signal conductor with multiple conductive layers is formed. During high-speed signaling, the skin effect causes current to concentrate near the surfaces of conductors. The multiple-layer signal conductor, however, has increased surface area with respect to its total cross-sectional area. The effective cross-sectional area which is conductive during high-speed signaling is therefore increased, leading to positive effects on transmission line resistance, heating, signal integrity and signal propagation delay. The multiple-layer signal conductor sees special use on silicon circuit boards and can conduct signals at ten gigahertz or greater for distances of up to five inches without rebuffering or termination.
摘要:
A reconfigurable high performance computer occupies less than 360 cubic inches and has an approximate compute power of 0.7 teraflops per second while consuming less than 1000 watts. The computer includes a novel stack of semiconductor substrate assemblies. Some semiconductor substrate assemblies involve field programmable gate array (FPGA) dice that are directly surface mounted, as bare die, to a semiconductor substrate. Other semiconductor substrate assemblies of the stack involve bare memory integrated circuit dice that are directly surface mounted to a semiconductor substrate. Elastomeric connectors interconnect adjacent semiconductor substrates proceeding down the stack. Tines of novel comb-shaped power bus bar assembly structures extend into the stack to supply DC supply voltages. The supply voltages are supplied from bus bars, through vias in the semiconductor substrates, and to the integrated circuits on the other side of the substrates. The power bus bars also serve as capacitors and guides for liquid coolant.
摘要:
A PLD includes a plurality of logic blocks, a test circuit, and a test pin set. The logic blocks are coupled to gating circuits that selectively adjust an operating voltage for the blocks in response to control signals. During operation of the PLD, the control signals are updated in response to externally-generated signals provided to the PLD via the test pin set and routed to the logic blocks using the test circuit.
摘要:
A reconfigurable high performance computer occupies less than 360 cubic inches and has an approximate compute power of 0.7 teraflops per second while consuming less than 1000 watts. The computer includes a novel stack of semiconductor substrate assemblies. Some semiconductor substrate assemblies involve field programmable gate array (FPGA) dice that are directly surface mounted, as bare die, to a semiconductor substrate. Other semiconductor substrate assemblies of the stack involve bare memory integrated circuit dice that are directly surface mounted to a semiconductor substrate. Elastomeric connectors interconnect adjacent semiconductor substrates proceeding down the stack. Tines of novel comb-shaped power bus bar assembly structures extend into the stack to supply DC supply voltages. The supply voltages are supplied from bus bars, through vias in the semiconductor substrates, and to the integrated circuits on the other side of the substrates. The power bus bars also serve as capacitors and guides for liquid coolant.
摘要:
An apparatus includes a volume of insulator disposed over a top surface of a semiconductor substrate, a tube of soft dielectric, and a metal conductor. The insulator has a hardness of more than approximately three gigapascals (gPa) and the soft dielectric has a hardness of less than three gPa. The tube of soft dielectric and the metal conductor are both embedded within the volume of insulator. The tube defines a central volume and the metal conductor extends in a direction through the central volume for a distance of at least one inch. The metal conductor is encircled by the soft dielectric when the apparatus is viewed in a cross-sectional plane perpendicular to the direction. The metal conductor may include a plurality of bend portions. The metal conductor does not break when the apparatus is temperature cycled over a range from zero to eighty five degrees Celsius.
摘要:
A system replicates the rapid temperature increases that are believed to cause microbump failures in certain applications of programmable logic devices (PLDs). The system configures a PLD under test with a circuit that switches a large amount of current and generates a large amount of heat when the circuit is clocked. The system monitors the temperature of the PLD and controls the switching of the circuit to achieve a predetermined temperature within a predetermined time period. The PLD is cooled, and the thermal cycling is repeated. The system detects microbump failures and communicates failure data to a computer for logging and analysis.
摘要:
An integrated circuit die contains digital circuitry that emits noise (for example, in the audio frequency range) in the form of electromagnetic radiation. The integrated circuit die is provided with a shielded platform above the digital circuitry. The shielded platform has one metal plate that is coupled to an analog supply voltage source and another metal plate that is coupled to an analog ground terminal. The digital circuitry is coupled to a digital supply voltage source. A second die with noise-sensitive analog circuitry is stacked on the shielded platform and is shielded by the shielded platform from the noise. The analog circuitry is powered by the analog supply voltage source. Conductive vias in a predetermined pattern protrude through the shielded platform and provide a standardized way of connecting any one of numerous noise-sensitive second dice to the relatively noisy digital circuitry of the underlying die.