摘要:
Method of producing a frame made of connected semiconductor die mounting substrates comprises i) a first step for producing a metal substrate sheet wherein an original material for metal substrate sheet of a desired size is cut out from a metal material and an erosion preventing layer is provided on the entire surface thereof, ii) a second step for producing a circuit substrate sheet wherein the circuit substrate sheet is made of a resin substrate coated with a copper leaf layer and is provided with a lead pattern on the surface thereof in place, iii) a third step for producing a connected semiconductor die mounting substrate sheet by adhering the metal substrate sheet to the circuit substrate sheet, iv) a fourth step for forming a plurality of pilot apertures and slits on the connected semiconductor die mounting substrate sheet by press working and v) a fifth step for producing a plurality of connected semiconductor die mounting substrate frames by separating the connected semiconductor die mounting substrate sheet.
摘要:
A loop-back recovery technique used when a failure takes place in a ring network, for transmitting information to a path indicated with a path ID number or the time slot position from a periodic frame. This is achieved by establishing working paths on one of the dual ring line between a transmission node and a receiving node thereof, establishing ring-formed protection paths in a ring line of the direction opposite to the working line, and making a loop-back from the working paths to the corresponding protection paths at a node which detected the failure. The receiving node multiplexes the working and protection paths to receive data from either.
摘要:
Disclosed is a word line drive circuit of an LSI semiconductor memory device comprising a plurality of word lines, a plurality of memory cells connected each to the word line, a row decoder and drive circuit connected to said plurality of word lines for selecting and driving the word line from a first voltage level to a second voltage level in response to an input address signal in a memory cycle, and a negative voltage generating circuit connected to the plurality of word lines for generating a negative voltage in a non-memory cycle, wherein the word line drive circuit comprises a reset circuit for maintaining the selected word line at an intermediate voltage level between the first voltage level and the second voltage level at least in one point of an end point and an starting point of the memory cycle.
摘要:
A flexdible film substrate carries a pattern of conductive leads and mounting pads. The conductive leads have outer lead portions, and inner lead portions which terminate near to the mounting pads. Semiconductor chips are mounted face-up on the mounting pads and connected by wire-bond connections to the inner lead portions. A transfer molding process is used to encapsulate the semiconductor device assemblies leaving the outer lead portions protruding from the encapsulated material. The flexible film substrate supports the mounting pads and conductive leads during the wire-bonding and transfer molding operations.
摘要:
A rear wheel steering device for a vehicle has a steering control mechanism which steers rear wheels of the vehicle on the following formula:TG.theta..sub.R =-K.sub.F .multidot..theta..sub.F +K.sub.R .multidot.V.multidot..psi.whereTG.theta..sub.R : target steering angle of rear wheels.theta..sub.F : steering angle of front wheelsV: vehicle speed.theta.: yaw rateK.sub.F, K.sub.R : coefficients determined by the properties of vehicle.To achieve slip angle .beta.=0, the device further includes a vehicle condition detecting mechanism which detects various conditions of the vehicle, and a changing mechanism being connected with the steering control mechanism and the vehicle condition detecting mechanism for changing at least one of the coefficients K.sub.F, K.sub.R based on the conditions of the vehicle.
摘要:
After an inner wall tube, made of steel or alloy containing not less than 2% of Cr, whose outer surface thereof is machined and/or ground to a thickness of 0.1 mm or more including the scale layer, is inserted into an outer wall tube, made of ferritic steel containing not less than 2% of Cr, in which an oxide scale layer containing Cr and having a thickness of 10 to 30 μm is formed in the inner surface thereof, cold working at an outside diameter reduction rate of 5 to 30% is performed. Similarly cold worked after an inner wall tube having an oxide scale layer on the outer surface thereof, is inserted into an outer wall tube whose inner surface is machined and ground. A double-walled tube made has a uniform gap and an excellent thermal conductivity, and is suitable as materials for SG tubes of future FBR.
摘要:
According to a low alloy steel of the present invention, compositional elements thereof are limited, and a metal structure thereof comprises bainite or martensite. Further, proper amounts of Nd inclusions are formed by appropriately selecting timings of deoxidation and Nd addition in melting a steel. Consequently, compatibility between high-temperature creep strength and long-term creep ductility, which is hardly established in conventional steels, can be achieved even in hostile conditions. Accordingly, the low alloy steel of the present invention can be widely applied as the material for the heat-resistant structural member used for a long time under the high-temperature and high-pressure conditions such as power plant boilers, turbines, and nuclear power plants.
摘要:
The present invention relates to a compound represented by the formula (I): (wherein, R3, R6, R7 and R21 are the same as or different from one another and each represents a hydroxyl group etc.), a pharmacologically acceptable salt thereof or a hydrate of them. The compound (I) of the present invention suppresses angiogenesis, in particular, suppresses VEGF production in a hypoxic condition and is useful as a therapeutic agent for treating solid cancer.
摘要:
Steel tubes for bearing element parts according to the present invention, wherein the specific compositions are limited and an accumulation intensity of {211} face along with an impact property at ambient temperature in the longitudinal direction of steel tube are specified, can be provided as a source material for bearing element parts, which have excellent machinability and fatigue life in rolling contact, being incorporated without adding a free-cutting element specifically nor without reducing productivity since the spheroidizing for the same annealing duration with that of conventional spheroidizing treatment can be applied. Accordingly, by applying a manufacturing method or a cutting-machining method according to the present invention, bearing element parts such as races, rollers and shafts can be produced with less cost and efficiently.
摘要:
The present invention provides a novel bioactive substance having an antitumor activity and a process for producing it, and a medical use thereof. Namely, it provides a 12-membered ring macrolide compound represented by the following formula obtained from the incubation solution of Streptomyces sp. Mer. 11107 or a variant thereof, a pharmacologically acceptable salt thereof or a hydrate of them, and a process for producing it