摘要:
A composition for sealing a semiconductor device contains polyphenylene sulfide wherein a line expansion coefficient at 150° C. to 200° C. is 4.75×10−5 [1/°C.] or less, a line thermal expansion coefficient at 80 to 130° C. is 6.0×10−5 [1/°C.] or less, and a line expansion coefficient ratio between the flow direction and a normal direction of the flow direction is 0.55 or more.
摘要:
A reusable packaging material for semiconductor devices. The semiconductor device package is formed from a thermoplastic resin. The resin has good fluidity and good adhesion. The new package is recyclable because the thermoplastic resin hardening process is reversible. The new package has sufficient mechanical strength and adhesion to seal a semiconductor device. A thermoplastic material for sealing a semiconductor element is characterized by 4.5×10−5[1/.degree.C.] or less linear thermal expansivity at about 150-200 .degree.C.
摘要:
A semiconductor device comprising a package formed of a thermoplastic resin, first and second lead frames arranged parallel to each other with a predetermined space interposed therebetween, and each having a distal end portion of a predetermined length located in the package, solder films formed on the first and second lead frames from outside the package to inside the package, a semiconductor element mounted on the distal end portion of the first lead frame and having an electrode, and a bonding wire having an end connected to the electrode of the semiconductor element, and another end connected to the distal end portion of the second lead frame.
摘要:
A light emitting device includes: a light emitting element; a first lead including a recess in one end portion, the recess including a first bottom surface with the light emitting element bonded thereto, at least one of a through hole and a notch, and a light shielding portion capable of suppressing leakage of emitted light from the light emitting element from the one of the through hole and the notch; a second lead opposed to the first lead; and a molded body filling the one of the through hole and the notch, covering the light emitting element, embedding at least part of the first lead and at least part of the second lead, and made of a translucent resin.
摘要:
A motor includes a cover made of a resin material. The cover includes a first annular portion arranged to extend in an annular shape above coils, a side wall portion arranged to extend downward from an outer circumferential portion of the first annular portion, and a second annular portion arranged to extend radially outward or radially inward from a lower end portion of the side wall portion along an upper surface of a circuit board. The side wall portion is arranged to extend in an axial direction while filling in gaps between teeth on a radially inner side of radially outer end surfaces of the teeth. The coils are covered by the cover to be protected from dust, water droplets, etc. The radially outer end surfaces of the teeth are exposed from the cover, and are thus arranged to be in radial proximity to a rotor magnet.
摘要:
A motor according to the present invention includes a boss portion 34 preferably includes an inner ring portion 342 having at an axially lower end surface thereof a substantially ring shaped convex portion 3421. The boss portion 34 preferably includes at a central portion thereof a through hole at which a shaft 32 is press fitted. A rotor holder 31 having a substantially cylindrical shape includes a through hole 321 centered about a rotary axis. The through hole 321 and the inner ring portion 342 of the boss portion 34 are fitted to one another. The convex portion 3421 includes a portion plastically deformed outwardly in the radial direction so as to sandwich an inner circumferential surface 3211 of the rotor holder 31. The inner circumferential surface of the impeller cup portion 22 includes a plurality of convex portions 221 near an upper portion thereof. The rotor holder 31 is press into the inner circumferential surface of the impeller cup portion via the convex portions 221.
摘要:
A method of manufacturing an optical semiconductor device includes preparing an optical semiconductor provided on a distal end of a first lead portion of a lead frame and connected electrically with a distal end of a second lead portion of the lead frame, forming thermoplastic resin for preparing a package molding jig having a concave portion corresponding to a contour of a package of the optical semiconductor device, inserting the distal ends of the lead portions into the concave portion of the package molding jig for positioning and fixing, and filling packaging resin in the concave portion of the package molding jig.
摘要:
A method of manufacturing an optical semiconductor device includes preparing an optical semiconductor provided on a distal end of a first lead portion of a lead frame and connected electrically with a distal end of a second lead portion of the lead frame, forming thermoplastic resin for preparing a package molding jig having a concave portion corresponding to a contour of a package of the optical semiconductor device, inserting the distal ends of the lead portions into the concave portion of the package molding jig for positioning and fixing, and filling packaging resin in the concave portion of the package molding jig.
摘要:
In a magnetron for microwave oven, a high-voltage input terminal structure 30 is provided on a shield box 26 mounted on a magnetron unit 22. The high-voltage input terminal structure 30 has a cylindrical earth electrode 33, a cylindrical high potential inner electrode 32 and a central conductor 31a. The cylindrical earth electrode 33 is secured to the shield box 26 and the cylindrical high potential inner electrode 32 is coaxially arranged in the cylindrical earth electrode 33. The central conductor 31a is connected through an inductor 28 to a cathode lead 27 of the magnetron unit 22. An insulating resin 34b is filled in a gap between the cylindrical earth electrode 33 and the highpotential electrode 32 to form a capacitor section C. Cylindrical insulating sheaths 37, 38 are formed by the resin on the both sides of the capacitor section C. The capacitor section C and the cylindrical insulating sheaths, 37, 38 are integrally formed and continuously extended along a straight line.
摘要:
A laser processing machine includes a work head, a plate-like work working table for processing a plate-like work, a rod-like work working table including a rod-like work holder for processing a rod-like work, and a work area in which the work head is movably provided. The plate-like work working table is provided movably from one side of the work area into the work area. The rod-like work working table is provided movably from another side of the work area into the work area that is opposite side of the one side. According to the laser processing machine, when switching over between a processing of a plate-like work and a processing of a rod-like work, it is needed only to move/evacuate the plate-like work working table and the rod-like work working table to/from the work area, so that the switching-over operation can be easily done.