摘要:
A Cu-Ag alloy brazing filler material with low Ag content that exhibits excellent brazability and has a low vapor pressure is disclosed. The filler material comprises 5 to 35% by weight of Ag, 2.5 to 13% by weight of Si, with the balance being Cu and incidental impurities. The properties of the filler material can be improved further by addition of at least one element selected from the group consisting of Sn, In, Fe, Ni, Co, B and Li.
摘要:
A Cu-Ag alloy brazing material that exhibits excellent cold workability, brazability and has a low vapor pressure is disclosed. The filler material comprises more than 35 to 50% by weight of Ag, 2.2 to 6% by weight of Si, with the balance being Cu and incidental impurities. The properties of the filler material can be improved further by addition of at least one element selected from the group consisting of Sn, In, Fe, Ni, Co, B and Li.
摘要:
A Cu alloy having high resistance to oxidation for use in leads on semiconductor devices is disclosed. The alloy consists essentially of 7-15 wt % Mn, 10-30 wt % Zn, 0.2-10 wt % Ni, 0.1-3 wt % Al, with the balance being Cu and incidental impurities. Also disclosed is a Cu alloy clad material wherein the substrate is made of Cu or Cu alloy having high electrical conductivity and good heat dissipation, and the cladding or partial cladding is composed of the Cu alloy having the composition specified above.
摘要:
A Cu alloy having high resistance to oxidation for use in leads on semiconductor devices is disclosed. The alloy consists essentially of 7-15 wt % Mn, 10-30 wt % Zn, 0.2-10 wt % Ni, 0.1-3 wt % Al, with the balance being Cu and incidental impurities. Also disclosed in a Cu alloy clad material wherein the substrate is made of Cu or Cu alloy having high electrical conductivity and good heat dissipation, and the cladding or partial cladding is composed of the Cu alloy having the composition specified above.
摘要:
For improvement in heat radiation capability without sacrifice of affinity for a paste, a substrate used for fabrication of a thick film circuit has a multi-level structure having a foundation of an aluminum nitride and a surface film provided on the foundation, and the surface film is formed of an oxygen compound containing silicon atoms.
摘要:
The present invention eliminates the problems associated with the use of oxygen-free copper and other high-purity copper materials as bonding wires. At least one rare earth element, or at least one element selected from the group consisting of Mg, Ca, Ti, Zr, Hf, Li, Na, K, Rb and Cs, or the combination of at least one rare earth element and at least one elemented selected from the above-specified group is incorporated in high-purity copper as a refining component in an amount of 0.1-100 ppm on a weight basis, and the high-purity copper is subsequently refined by zone melting. The very fine wire drawn from the so refined high-purity copper has the advantage that it can be employed in high-speed ball bonding of a semiconductor chip with a minimum chance of damaging the bonding pad on the chip by the ball forming at the tip of the wire.
摘要:
The present invention eliminates the problems associated with the use of oxygen-free copper and other high-purity copper materials as bonding wires. In accordance with one aspect of the present invention, at least one rare earth element, or at least one element selected from the group consisting of Mg, Ca, Ti, Zr, Hf, Li, Na, K, Rb and Cs, or the combination of at least one rare earth element and at least one elemented selected from the above-specified group is incorporated in high-purity copper as a refining component in an amount of 0.1-100 ppm on a weight basis, and the high-purity copper is subsequently refined by zone melting. The very fine wire drawn from the so refined high-purity copper has the advantage that it can be employed in high-speed ball bonding of a semiconductor chip with a minimum chance of damaging the bonding pad on the chip by the ball forming at the tip of the wire.In accordance with another aspect of the present invention, 0.5-3 ppm of a rare earth element and/or Y is further incorporated as an alloying component in the zone-refined high-purity copper.
摘要:
It is intended to provide highly stable variants of human antibody IgG2 and IgG3 subclasses. The present invention provides an IgG heavy chain comprising the constant region of a human IgG2 heavy chain having at least a substitution of Y for F at the 300th position, L for V at the 309th position, or A for T at the 339th position designated by the EU index of Kabat et al. and an IgG heavy chain comprising the constant region of a human IgG3 heavy chain having at least a substitution of K for N at the 392nd position or V for M at the 397th position designated by the EU index of Kabat et al. The present invention also provides monoclonal antibodies comprising these heavy chains.
摘要:
This invention provides an agonist antibody to a human thrombopoietin receptor (human c-Mpl), and pharmaceutical compositions comprising the same for use in treatment of thrombocytopenia. The disclosed agonist antibody comprises (1) antibody constant regions comprising heavy and light chain constant regions, each of which may optionally contain domain substitutions, or may contain deletions, substitutions, additions, or insertions of amino acid residues, and (2) antibody variable regions capable of binding to and activating a human thrombopoietin receptor. The-agonist antibody further induces colony formation at a concentration of 10,000 ng/ml or lower, and has a maximal activity at least 50% higher than that of PEG-rHuMGDF and an 50% effective concentration (EC50) of 100 nM or less.
摘要:
In a blood pressure information measurement device cuff, a first flexion point and a second flexion point at which a curvature radius changes are provided in a curler, and a straight line-shaped connection portion is provided between the first flexion point and the second flexion point so as to be located inside a curve formed by extending a first curved portion and a second curved portion that are located at the ends of the curler at the first flexion point and the second flexion point, according to the respective curvatures. Through this, it is possible to provide a blood pressure information measurement device cuff, and a blood pressure information measurement device provided with such a cuff, that can reduce error in a blood pressure measurement by reducing errors in changes in the volume of a fluid bladder.