摘要:
A high-reliability iron nitride-based magnetic powder with markedly improved weatherability with respect to deterioration over time of the magnetic properties in fine particles smaller than 25 nm is formed by adhering one or more of the elements Si and P to the surface of an iron nitride-based magnetic powder constituted primarily of Fe16N2 with an average grain size of 25 nm or less, where the total content of Si and P in the magnetic powder may be 0.1% or greater as an atomic ratio with respect to Fe. In particular, the invention provides an iron nitride-based magnetic powder such that the value ΔHc as defined by Equation (1) below is 5% or less and the value Δσs as defined by Equation (2) below is 20% or less. ΔHc=(Hc0−Hc1)/Hc0100 (1) Δσs=(σs0−σs1)/σs0100 (2) Here, Hc1 and σs1 are the coercivity and saturation magnetization, respectively, of the magnetic powder after being kept for one week at a constant temperature and constant humidity of 60° C. and 90% RH. Hc0 and σs0 are the coercivity and saturation magnetization of the magnetic powder before being kept at constant temperature and constant humidity.
摘要:
A high-reliability iron nitride-based magnetic powder with markedly improved weatherability with respect to deterioration over time of the magnetic properties in fine particles smaller than 25 nm is formed by adhering one or more of the elements Si and P to the surface of an iron nitride-based magnetic powder constituted primarily of Fe16N2 with an average grain size of 25 nm or less, where the total content of Si and P in the magnetic powder may be 0.1% or greater as an atomic ratio with respect to Fe. In particular, the invention provides an iron nitride-based magnetic powder such that the value ΔHc as defined by Equation (1) below is 5% or less and the value Δσs as defined by Equation (2) below is 20% or less. ΔHc=(Hc0−Hc1)/Hc0100 (1) Δσs=(σs0−σs1)/σs0100 (2) Here, Hc1 and σs1 are the coercivity and saturation magnetization, respectively, of the magnetic powder after being kept for one week at a constant temperature and constant humidity of 60° C. and 90% RH. Hc0 and σs0 are the coercivity and saturation magnetization of the magnetic powder before being kept at constant temperature and constant humidity.
摘要:
The present invention relates to a pyrimidine compound or a pharmaceutically acceptable salt thereof represented by the following formula [I] wherein each symbol is as defined in the specification and a method of therapeutically or prophylactically treating an undesirable cell proliferation, comprising administering such a compound. The compound of the present invention has superior activity in suppressing undesirable cell proliferation, particularly, an antitumor activity, and is useful as an antitumor agent for the prophylaxis or treatment of cancer, rheumatism, and the like. In addition, the compound of the present invention can be a more effective antitumor agent when used in combination with other antitumor agents such as an alkylating agent or metabolism antagonist.
摘要:
A semiconductor device 20 formed on a semiconductor chip substrate 30 has a plurality of circuit blocks made up of circuits each containing at least a metal oxide semiconductor (MOS) transistor 36, the circuit blocks being covered on top with a protective film 41 to protect the circuits. A plurality of bumps 23a, 23b, 23c are formed, at least via the protective film 41, only on circuit blocks whose current-carrying ability and threshold voltage do not satisfy predetermined values and which are in need of performance enhancement. The bumps 23a, 23b, 23c impose stresses on the MOS transistors 36, increasing the mobility of the MOS transistors 36 and thereby improving the performance of the semiconductor device 20.
摘要:
A semiconductor device 20 formed on a semiconductor chip substrate 30 has a plurality of circuit blocks made up of circuits each containing at least a metal oxide semiconductor (MOS) transistor 36, the circuit blocks being covered on top with a protective film 41 to protect the circuits. A plurality of bumps 23a, 23b, 23c are formed, at least via the protective film 41, only on circuit blocks whose current-carrying ability and threshold voltage do not satisfy predetermined values and which are in need of performance enhancement. The bumps 23a, 23b, 23c impose stresses on the MOS transistors 36, increasing the mobility of the MOS transistors 36 and thereby improving the performance of the semiconductor device 20.
摘要:
A semiconductor device, including: a substrate having an upper face on which a first ground pad, a first power supply pad, a first signal pad, and a second signal pad are formed; a first substrate formed on the substrate and having an upper face on which a third signal pad connected to the first signal pad and a first circuit are formed; and a semiconductor element including a second substrate having a reverse face on which a bump electrode connected to the first circuit and a second circuit are formed and an upper face on which a fourth signal pad connected to the second signal pad is formed, with a signal through via connected to the second circuit and the fourth signal pad being buried in the second substrate.
摘要:
A semiconductor device includes a substrate 2, a semiconductor element 3, a molding resin portion 4, and a plurality of connection terminals 5 arranged on a surface of the substrate around the outer periphery of the molding resin portion 4. In a region B corresponding to a resin passage used to form the molding resin portion 4, a plurality of metal planes 18 and 19 as resin peel-off portions exhibiting a low adhesive strength to the molding resin are arranged in a direction along the resin passage at appropriate intervals. At least one connection terminal 5 is located between the metal planes 18 and 19.
摘要:
An exhaust manifold is provided with a plurality of branch pipe parts and a collecting pipe part. The plurality of branch pipe parts are respectively connected to a plurality of exhaust ports of a multicylinder internal combustion engine. The collecting pipe part is formed by merging the plurality of branch pipe parts. The plurality of branch pipe parts and the collecting pipe part are formed by an upper shell member and a lower shell member superposed on each other. A partition plate is attached to at least one of the upper shell member and the lower shell member. The partition plate separates between exhaust gases flowing into the collecting pipe part from two of the branch pipe parts respectively connected to adjacent two of the plurality of exhaust ports.
摘要:
A wiring board according to the present invention has a substrate, a plurality of lines provided on the substrate, an interference-preventive conductor layer provided between the lines to have open ends and prevent signal interference between the lines, and a via electrically connected to the interference-preventive conductor layer. The via is provided at a point at which a distance from each of the open ends of the interference-preventive conductor layer is less than one quarter of a wavelength corresponding to a maximum frequency component of harmonic components contained in the signal.
摘要:
An image pickup section incorporates a solid-state image pickup element chip. Electronic parts for driving or controlling the image pickup section are mounted on a circuit board. First and second electrode pad groups are formed on the circuit board, and a separation band is also formed on the circuit board between the first and second electrode pad groups. The circuit board is used as it is when the image pickup device is not required to be bendable. When the image pickup device is required to be bendable, the circuit board is separated by cutting it at the separation band and the first and second electrode pad groups that are now respectively located on the separated pieces of the circuit board are connected to each other by signal lines.