摘要:
A tube guide for a ball screw having a screw shaft including a ball rolling groove; a nut including a ball rolling groove; a plurality of balls disposed in a ball rolling passage; and, a ball circulation tube and including a ball scooping portion in an end portion thereof, wherein the tube guide is used for mounting the ball circulation tube onto the nut, has an outer shape matched to the inner shape of a tube guide insertion hole formed in the nut so as to correspond to the insertion position of the ball scooping portion, and includes a scooping portion insertion hole consisting of a penetration hole formed so as to have an inner shape matched to the outer shape of the ball scooping portion, and wherein the tube guide is interposed between the ball scooping portion and the tube guide insertion hole.
摘要:
A composition for film formation which, when used in the production of semiconductor devices and the like, can give interlayer insulating films which differ little in dielectric constant even when obtained through curing under different conditions and have excellent adhesion to substrates, a process for producing the composition, and a silica-based film obtained from the composition. The composition for film formation comprises: (A) a product of hydrolysis and condensation obtained by hydrolyzing and condensing (A-1) at least one compound selected from the group consisting of compounds represented by the following formula (1), compounds represented by the following formula (2), and compounds represented by the following formula (3), and (A-2) at least one compound represented by the following formula (4), in the presence of a catalyst and water; and (B) an organic solvent.
摘要:
A composition for film formation which comprises: (A) a product of hydrolysis and condensation obtained by hydrolyzing and condensing at least one silane compound selected from the group consisting of compounds represented by the formula (1), compounds represented by the formula (2), and compounds represented by the formula (3) in the presence of water and at least one compound selected from the group consisting of tetraalkylammonium hydoxides, alicyclic organic amines, and metal hydroxides, and (B) an organic solvent.
摘要:
A method for mounting semiconductor elements without lowering the reliability of connection due to the residue of flux in the connection of the semiconductor elements to the wiring substrate. A part of the oxide film of a solder bump 3 can previously be broken by previously heating a semiconductor element 1 and a wiring substrate 2 to a predetermined preheating temperature, and pressure-welding the semiconductor element 1 to the wiring substrate 2. Furthermore, since the oxide film covering the surface of the solder bump 3 can be absorbed in the solder bump 3 by rhythmically moving the solder bump in a predetermined direction in the state where the solder bump is melted by heating the solder bump on the semiconductor element and the wiring substrate to a temperature above the melting point of solder, bonding can be performed without using flux. Furthermore, since the surface of the solder bump 3 formed on the semiconductor element 1 and/or the wiring substrate 2 can be prevented from oxidation, or the oxide film can be reduced by the inert gas or reducing gas 7 in the above-described air isolation box 6, the connection between the semiconductor element 1 and the wiring substrate 2 can further be stabilized.
摘要:
A probing apparatus has an apparatus body and a test head detachable from the apparatus body. A probe card having a plurality of probe needles to be brought into contact with a semiconductor wafer is supported by the test head. Three engaging rods are disposed on the test head around the probe card to receive the load of the test head in a distributed manner. A vertically movable work table is disposed on the apparatus body to place a substrate thereon. Two first support mechanisms and one second support mechanism are disposed on the apparatus body around the work table to support the test head such that the probe card opposes the work table. The support mechanisms detachably engage with the engaging rods and support the test head through the engaging rods. The first support mechanisms have elevating mechanisms for moving the test head in the vertical direction through the engaging rods. When the test head is moved by the elevating mechanisms, the inclination of the probe card with respect to the wafer placed on the work table is adjusted.
摘要:
A nitrogen-containing perfluoroalkanoyl peroxide is provided which is represented by the formula: ##STR1## wherein Rf.sub.1 and Rf.sub.2 independently stand for an alkyl group of 1 to 5 carbon atoms, provided that Rf.sub.1 and Rf.sub.2 are joined to each other in one of the three patterns of union, 1) direct union, 2) union through the medium of an oxygen atom or 3) union through the medium of a nitrogen atom to form one of the three rings, i.e. five-membered ring, six-membered ring or seven-membered ring. The nitrogen-containing perfluoroalkanoyl peroxide is produced by a method which comprises oxidizing a compound represented by the following formula: ##STR2##
摘要:
A nitrogen-containing perfluoroalkanoyl peroxide is provided which is represented by the formula: ##STR1## wherein Rf.sub.1 and Rf.sub.2 independently stand for an alkyl group of 1 to 5 carbon atoms, provided that Rf.sub.1 and Rf.sub.2 are joined to each other in one of the three patterns of union, 1) direct union, 2) union through the medium of an oxygen atom or 3) union through the medium of a nitrogen atom to form one of the three rings, i.e. five membered ring, six-membered ring or seven-membered ring. The nitrogen-containing perfluoroalkanoyl peroxide is produced by a method which comprises oxidizing a compound represented by the following formula: ##STR2##
摘要:
Even when a stiffener is omitted, the semiconductor device which can prevent the generation of twist and distortion of a wiring substrate is obtained.As for a semiconductor device which has a wiring substrate, a semiconductor chip by which the flip chip bond was made to the wiring substrate, and a heat spreader adhered to the back surface of the semiconductor chip, and which omitted the stiffener for reinforcing a wiring substrate and maintaining the surface smoothness of a heat spreader, a wiring substrate has a plurality of insulating substrates in which a through hole whose diameter differs, respectively was formed, and each insulating substrate contains a glass cloth.
摘要:
Regarding a semiconductor device, especially the present invention suppresses disconnection of the connection structure concerned in the semiconductor device which has the electric and mechanical connection structure using solder, and aims at improving connection reliability. And to achieve the above objects, the semiconductor device has the solder bump which electrically connects a semiconductor chip and a package substrate, the under-filling resin with which it filled up between the semiconductor chip and the package substrate, and a solder ball which electrically connects a package substrate with the outside, and the solder bump's elastic modulus is made lower than the elastic modulus of a solder ball.
摘要:
A client server system which enables the user of a client computer to obtain the optimum printing result only by designating desired print settings, and to perform printing according to common print settings even if printers are modified or a new printer is added on a network. A favorite display module displays a print setting designating screen relating a printer. A data sending and receiving module transmits the print settings designated on the print setting designating screen by a user and an ID of a client computer to a server. A data sending and receiving module receives a printer driver adapted to the printer and print setting information from the server. A favorite setting changing module changes print settings of the printer driver according to the print setting information sent from the server. A favorite setting completion display module indicates that the changing of the print settings has been completed.