Abstract:
The present invention provides a coated conductive powder in which the aggregation of conductive particles is suppressed and which is also excellent in electrical reliability, and a conductive adhesive using the same that can provide connection with high electrical reliability even for the connection of the electrodes of miniaturized electronic parts, such as IC chips, and circuit boards. The coated conductive powder of the present invention is a coated conductive powder obtained by coating the surfaces of conductive particles with insulating inorganic fine particles, wherein the volume resistivity value of the coated conductive powder is 1 Ω·cm or less, the specific gravity of the insulating inorganic fine particles is 5.0 g/ml or less, the particle diameter ratio of the insulating inorganic fine particles to the conductive particles (the insulating inorganic fine particles/the conductive particles) is 1/100 or less, and the insulating inorganic fine particles adhere to the surfaces of the conductive particles.
Abstract:
A method for manufacturing a semiconductor optical device includes: forming a laminated semiconductor structure of GaN-based materials on a semiconductor wafer, the laminated semiconductor structure forming a laser diode of GaN-based materials, including an active layer having a quantum well structure; cleaving the semiconductor wafer including the laminated semiconductor structure to expose a cleaved end face of the laminated semiconductor structure; and forming an SiO2 film on the cleaved end face and performing a heat treatment to cause Ga vacancy diffusion in the active layer to disorder the quantum well structure of the active layer.
Abstract:
A fault tolerant (FT) computer system includes a first system; and a second system configured to operate in synchronization with the first system. Each of the first and second systems includes a CPU; and a routing controller connected with the CPU. The first system includes a first I/O device as an activist I/O device, and the second system includes a second I/O device as a standby I/O device. The routing controller controls a routing between the CPU and the first I/O device and the second I/O device. When a fault has occurred in the first I/O device, the routing controller in said first system routes a request data a request data received from the CPU and destined to the first I/O device, to the second I/O device.
Abstract:
A method for manufacturing a semiconductor optical device includes: forming a first resist pattern on a top surface of a laminated semiconductor structure; forming channels and a waveguide ridge by dry etching using the first resist pattern as a mask; forming an SiO2 film on the waveguide ridge and the channels, leaving the first resist pattern on a top surface of the waveguide ridge; forming a second resist pattern covering the SiO2 film on the channels, and exposing the top surface of the SiO2 film on top of the waveguide ridge; removing the SiO2 film by dry etching using the second resist pattern as a mask; removing the first and second resist patterns by a wet method; and forming a p-side electrode.
Abstract:
A method of mapping a large number of items of contents each having meta-information to a low dimensional space so that the map of the contents reflects the meta-information. The method includes the steps of assigning a concept vector to each item of contents, adjusting the distance between two items of contents so that the closer the classification information of the two items of contents match, the more the distance is reduced, and assigning position information in the low dimensional space to each item of contents based on the adjusted distance.
Abstract:
There is disclosed a method capable of resetting a fault tolerant computer in complete synchronization among modules. The method includes a step of generating a reset requesting signal by one of the modules, a step of dividing the reset requesting signal to first and second reset requesting signals, a step of transmitting the second reset requesting signal to the other module, a step of delaying the first reset requesting signal in the one module by a time required for transmitting the second reset requesting signal to the other module, a step of resetting at least one CPU included in the one module by a first CPU reset signal generated based on the first reset requesting signal delayed in the one module, and a step of resetting at least one CPU included in the other module by a second CPU reset signal generated based on the second reset requesting signal transmitted to the other module.
Abstract:
A conductive electroless plated powder includes core particles and a nickel film formed by an electroless plating process on the surface of each core particle, wherein crystal grain boundaries are not recognized in the cross section in the direction of the thickness of the nickel film when observed with a scanning electron microscope at a magnification of up to 100,000. A method for making such a conductive electroless plated powder is also disclosed.
Abstract:
In a network switch including a user network port connectable to a user network, a plurality of down link ports each connectable to one server unit, a server unit management network port connectable to a server unit management network for managing the server unit, a store-and-forward switching unit connected to the user network port, the down link ports and the server unit management network port, and a control unit connected to the store-and-forward switching unit, when a packet that has arrived at one of the down link ports is a dynamic host configuration protocol (DHCP) packet including a network boot option, the control unit operates the store-and-forward switching unit to transmit the packet to the server unit management network port.
Abstract:
A conductive electrolessly plated powder used, for example, for bonding a small electrode of an electronic device, its producing method, and a conductive material containing the plated powder. Conventionally, there has been known, as conductive powders, metallic powders such as of nickel, carbon powders, and conductive plating powders the resin core particles of which are coated with a metal, e.g., nickel. However, there has been no conductive electrolessly plated powders having a good conductivity with respect to connection between conductive patterns having an oxide coating thereon or between electrodes and no methods for producing such powders industrially. The conductive electrolessly plated powder of the present invention consists of resin spherical core particles the average size of which is 1 to 20 &mgr;m and each of which has a nickel or nickel alloy coating formed by electroless plating. The coating includes small projections of 0.05 to 4 &mgr;m on its outermost layer and the coating is substantially continuous with the small projections. A method of producing such a powder is also disclosed.
Abstract:
A ball bearing has an outer race, an inner race, and a retainer disposed between the outer race and the inner race. The retainer comprises an annular member having a first annular surface and a second annular surface disposed opposite the first annular surface, a plurality of annularly spaced pockets formed in the first annular surface of the annular member, and a plurality of annular spaced fingers each having inner and outer surfaces and projecting generally axially from the first annular surface of the annular member so that the pockets are disposed between adjacent inner surfaces of respective ones of the pairs of fingers, the first annular surface of the annular member having external and internal edges and a plurality of surface portions each disposed between adjacent outer surfaces of respective ones of the pairs of fingers and inclined toward the second annular surface of the annular member from the external edge to the internal edge. Balls are disposed in respective ones of the pockets of the annular member and coact with the outer and inner races.