摘要:
In effecting positioning of a workpiece relative to a working tool, indexing is carried out by obtaining precision measurement of the relative distance between the workpiece and the working tool by using a laser beam. Positioning can be effected with improved precision and working can be achieved with improved dimensional accuracy.
摘要:
A diamond tool for the mirror-finish cutting of non-ferrous materials and a method of manufacturing the same are provided. The diamond tool has a main cutting edge and minute side cutting edges formed at the opposite ends of the main cutting edge so as to intersect the main cutting edge at an angle. The dept .DELTA. of chamfer of the side cutting edge is 1.5 to 5 times the depth of tears formed in the machined surface (0.1 .mu.m.ltoreq..DELTA..ltoreq.1 .mu.m) and the length l.sub.2 of the side cutting edged is 1.5 to 10 times the feed of the diamond tool (0.02 mm.ltoreq.l.sub.2 .ltoreq.0.8 mm). The rake face of the diamond tool comprises two rake faces and two side rake faces. A tool grinding surface plate for manufacturing the diamond tool has a flat surface for grinding the rake faces, and a circumferential tapered surface for grinding the side rake faces. The end relief surface and the rake face of the diamond tool is in the (001) zone of the single crystal diamond tip thereof, and the crystal orientation of the end relief surface is in the range of (150) and (010) or a crystallographic equivalent.
摘要:
An optical position sensing component includes an input light guiding portion and a received light guiding portion. The input light guiding portion is constituted by a polymer waveguide and inputs a light emitted from a near-infrared light-emitting source and outputs the light to a lens for collimate through a plurality of ends. The received light guiding portion is constituted by a polymer waveguide and inputs the light output from the light guiding portion and outputs the input light to a near-infrared light-receiving device. Further, the polymer waveguide has a core portion composed of a cured photosensitive resin composition.
摘要:
A connection structure of the present invention has a board with a through hole perforating therethrough, a land formed around the through hole, and a lead extending from an electronic component and disposed in the through hole. The land includes a wall surface land portion formed on a wall surface of the through hole, and front and back surface land portions formed on the front and back surfaces of the board respectively. A fillet connecting the land and the lead includes upper and lower fillet portions respectively contacting with the front and back surface land portions. A profile of the upper fillet portion is smaller than that of the lower fillet portion and is not smaller than that of the through hole. Therefore, occurrence of lift-off is effectively reduced while using a lead-free solder material.
摘要:
An adhesive composition comprising 10 to 60 parts by weight per 100 parts of the total weight of components (1) to (4) of a monofunctional (meth)acrylic monomer, 0.01 to 10 parts by weight per 100 parts of the total weight of components (1) to (4) of a compound having at least two (meth)acryloyl groups in a molecule, 30 to 80 parts by weight per 100 parts by weight of the total weight of components (1) to (4) of a heat resistant epoxy resin, 0.1 to 20 parts by weight per 100 parts by weight of the total weight of components (1) to (4) of an imidazole compound, 0.001 to 10 parts by weight per 100 parts by weight of the total weight of components (1) to (4) of a photopolymerization initiator, and 0.01 to 20 parts by weight per 100 parts by weight of the total weight of components (1) to (4) of a thixotropic agent, with which an electronic part can be effectively packaged to a printed board.
摘要:
A bonding method of semiconductor device by using a film carrier; A heat-resistive insulating layer is deposited all over the surface of a dummy wafer on which a photo-resist film having a predetermined pattern is previously formed; The photo-resist film is removed together with the heat-resistive insulating layer for forming openings; Bumps are formed on the openings by plating using the heat-resistive insulating layer as a mask; After transferring the bumps to inner leads, the bumps of the inner leads are bonded to bonding pads of the semiconductor element.
摘要:
An optical position sensing component includes an input light guiding portion and a received light guiding portion. The input light guiding portion is constituted by a polymer waveguide and inputs a light emitted from a near-infrared light-emitting source and outputs the light to a lens for collimate through a plurality of ends. The received light guiding portion is constituted by a polymer waveguide and inputs the light output from the light guiding portion and outputs the input light to a near-infrared light-receiving device. Further, the polymer waveguide has a core portion composed of a cured photosensitive resin composition.
摘要:
A multi-layer wiring substrate capable of high density packaging, and a method of manufacturing the same, in which a carrier substrate, in which through holes can be easily formed in high density corresponding substantially to a pitch of connecting terminals in a semiconductor chip, and build-up layers are formed on the substrate with the application of a conventional build-up technique. When the build-up technique for repeatedly forming insulating layers and wiring layers on a carrier substrate is used to manufacture a multi-layer wiring substrate, the carrier substrate is formed in the following manner. First, an insulating resin layer is formed in a copper foil, in which a plurality of first windows are regularly provided, to cover the copper foil, and the resin layer fills the interior of the windows. Subsequently, second windows of a particular shape are provided in regions of layers of the insulating resin filled in the windows, and independent conducting paths are formed through the second windows to extend from front sides of the second windows to back sides thereof. The conducting paths are formed radially to be spaced a substantially equal distance from centers of the respective second windows.
摘要:
An oscillating piston type compressor has a piston formed integral with a blade. The compressor accommodates in a casing a compression mechanism section and a motor section, the mechanism including the piston having a plate-shaped blade integrally formed on a cylindrical portion is fitted onto an eccentric portion of a crankshaft to perform orbital motion relative to an inner peripheral surface of a cylinder, the plate-shaped blade being formed at its radial end surface with a recess or a protrusion, which serves as a reference of position.
摘要:
Disclosed is an image sensor including a circuit board, an array of light emitting elements for emitting light to an image plane, an array of light receiving elements for receiving image information transmitted by reflected light from the image plane, and plural pairs of light wave guides interposed between the light emitting elements and the image plane and between the image plane and the light receiving elements. Both the light emitting elements and the light receiving elements are mounted on the same surface of the circuit board.