摘要:
Arranged in the bottom of a cup-shaped cylindrical casing is a solid disc form of axially uniformly magnetized permanent magnet having a single pair of poles each formed on one or the other of its opposite end faces over the whole region thereof. A circular plate of magnetically permeable material is fixedly mounted on the magnet and to which plate a set of coiled posts are fixedly fitted. The casing is preferably formed on its outer periphery with cooling fins for dissipation of heat generated therein during printing operation. The magnet and the plate thereon, identical in outer diameter, are radially spaced an appropriate slight distance from the inner wall surface of the casing to form a bypass circuit for the flux of the magnet. Arranged in the open top of the casing is a spring-charge type print hammer assembly which includes a radial array of resilient tongues (hammers) and print wires secured thereto preferably through the medium of flat armature plates fixed to the respective tongues. The print head is particularly suited for high-speed printing operation with low power requirements and, owing primarily to the extremely simplified form of magnet used, is of reduced fabrication cost. The armature plates, in cooperation with a yoke plate slotted to receive the plates serve to compensate for any possible increase in reluctance of the main magnetic circuit and increase the kinetic energy of the tongues or print hammers when released.
摘要:
Provided is a method of manufacturing a resin molded gear, which is to be integrally formed by injection molding, and includes: a tooth portion formed along an outer peripheral surface of a rim; a web extending along an inner peripheral surface of the rim; and a gate portion arranged at a boss, which joins to at least part of the web and is formed on a core portion located at a center axis, the method using a synthetic resin having a melting temperature of Tm° C., the method including: injecting and loading the synthetic resin molten at the melting temperature of Tm° C. into a cavity of a mold for forming the resin molded gear; and setting, when the gate portion is solidified, a thickness center temperature T1 of the web to (Tm−20)° C. or more to (Tm+20)° C. or less and a surface temperature T2 of the tooth portion to (T1−50)° C. or less.
摘要:
A liquid epoxy resin composition for semiconductor encapsulation comprising: (A) at least one epoxy resin, (B) at least one curing accelerator and (C) at least one acid anhydride terminated polyamic acid. The liquid epoxy resin composition provides a cured material that has an excellent adhesiveness to a semiconductor chip surface and has an excellent moisture resistance.
摘要:
Provided is a method of manufacturing a resin molded gear, which is to be integrally formed by injection molding, and includes: a tooth portion formed along an outer peripheral surface of a rim; a web extending along an inner peripheral surface of the rim; and a gate portion arranged at a boss, which joins to at least part of the web and is formed on a core portion located at a center axis, the method using a synthetic resin having a melting temperature of Tm° C., the method including: injecting and loading the synthetic resin molten at the melting temperature of Tm° C. into a cavity of a mold for forming the resin molded gear; and setting, when the gate portion is solidified, a thickness center temperature T1 of the web to (Tm−20)° C. or more to (Tm+20)° C. or less and a surface temperature T2 of the tooth portion to (T1−50)° C. or less.
摘要:
A mask blank manufacturing department manufactures a mask blank by forming a thin film to be a mask pattern on a mask blank transparent substrate. When providing the mask blank to a mask manufacturing department, the mask blank manufacturing department provides optical characteristic information (transmittance variation) of the mask blank transparent substrate and optical characteristic information (transmittance variation and/or phase difference variation) of the mask blank to the mask manufacturing department. The optical characteristic information of the mask blank transparent substrate is provided to the mask blank manufacturing department from a materials processing department that manufactures mask blank transparent substrates.
摘要:
An image reading system includes an information processing apparatus and a scanner connected to the information processing apparatus via a network. Upon receiving input of information that specifies the number of pages to be included in a file through an input unit and a web browser, the information processing apparatus transmits the information through a first communication unit to the scanner. The scanner reads image data through a reading unit, and divides the image data into files based on the information through a data management unit. The scanner transmits the files to the information processing apparatus through a second communication unit. The information processing apparatus displays images of the files on a monitor.
摘要:
In flip chip attach of electronic components, underfill is filled between the component and the substrate to alleviate, for example, thermal stress. In electronic component mounting using copper pillars conducted so far, filler contained in the underfill may cause separation in the process of heating and curing the resin. Disclosed is plating the surfaces of the copper pillars with solder. Mobilization of the filler charged in the underfill due to electric fields produced by local cells that are developed upon contact between dissimilar metals, is suppressed, and occurrence of crack at connection portions is obviated. Thus, connection reliability is increased.
摘要:
A technology for effectively preventing deformation of a light reflector plate fabricated by forming a synthetic resin reflector plate into a three-dimensional shape enabling a thinner light reflector plate, and additionally, reducing processing costs is provided. An adhesive tape for shape-retention is adhered onto a reflector plate which is fabricated by forming predetermined areas of a light-reflecting plastic film or sheet into a three-dimensional shape.
摘要:
A three-dimensional light reflection plate that can successfully prevent deformation of the light reflection plate, reduce initial cost and product cost, and facilitate increase in size and reflectance. The light reflection plate includes a bottom plate in which a plurality of mutually parallel slit holes are formed on a flat, light-reflective plate material and a mountain plate that is rectangular from a planar view of which a width direction cross-sectional shape is a mountain shape and in which insertion sections are formed in both width-direction end sections. The mountain plate is fixed to the bottom plate by the insertion sections of the mountain plate being inserted into the slit holes of the bottom plate.
摘要:
In a transparent substrate for a mask blank, which is required to have a predetermined optical characteristic, a substrate mark is formed by cutting off a predetermined corner portion into an oblique section. The shape of the mark is determined in accordance with the optical characteristic of he substrate.