摘要:
In a lead frame for use in a plastic mold type semiconductor device having a frame, a die pad on which a semiconductor element is mounted, a tie bar for connecting the die pad to said frame and for supporting the die pad, a plurality of leads whose inner ends of the leads are disposed around the die pad and the leads have inner leads portions which are portions to be sealed in a mold, metal plated region applied only to cover the inner lead and opposite end portions of the the die pad respectively confronting the inner leads, but the tie bar is not plated.
摘要:
A testing method of a semiconductor laser emitting a wavelength under a test different from a reference wavelength in a given wavelength range includes: a first step of obtaining a length of an optical fiber under the test satisfying a reference dispersion condition at the wavelength under the test, based on the reference dispersion condition for the test and a unit dispersion amount of the optical fiber; and a second step of inputting a modulation signal that is a modulated laser light of the semiconductor laser having a wavelength as the wavelength under the test into an optical fiber having substantially the same length as the length obtained in the first step and evaluating an output of the optical fiber.
摘要:
A laser module includes a semiconductor laser, an output optical system provided on an optical output side of the semiconductor laser, a temperature detecting element that detects a temperature of the output optical system; and an output controller that calculates a drive current to set an optical output intensity of the laser module at a desired value on the basis of temperature information obtained by the temperature detecting element, and outputs the drive current to the semiconductor laser.
摘要:
There is disclosed a TAB style BGA type semiconductor device. This semiconductor device comprises a semiconductor chip on which an integrated circuit is formed, and a polyimide tape which has a conductive pattern and which is allowed to adhere to the semiconductor chip. The conductive pattern includes a bonding portion connected to the pad of the semiconductor chip, a pad portion connected to the outside electrode, and an electrically floating island-like portion in addition to a wiring portion for connecting the bonding portion and the pad portion.
摘要:
Partially crosslinked thermoplastic elastomer which is produced as follows:(A) propylene (10-90 weight part), (B) halogenated butyl rubber (90-10 weight part, (A)+(B)=100 weight part), (C) olefinic rubber (10-120 weight part) and (D) mineral oil softening agent (5-120 weight part) are heated in the presence of (E) metal oxide and/or metal chloride. To the composition based on (A)-(E) (100 weight part), (F) polyolefin (300-1900 weight part) and (G) styrenic rubber (50-1100 weight part) are blended. The composition has particularly good moldability, compatibility, low temperature impact strength, and gloss, and can be used for large scale molding.
摘要:
In order to tune an oscillation wavelength of a semiconductor laser diode to a target wavelength, the amount of change of a wavelength to the amount of change of a wavelength varying item is determined by actual measurement and a basic wavelength coefficient is renewed by using the ratio of both amounts of change as a corrective wavelength coefficient, and thus the characteristic when the wavelength of an actual device is made closer to a target wavelength is utilized.
摘要:
A semiconductor device is provided with a semiconductor substrate, an oxide film formed on the surface of the semiconductor substrate, an electrode pad formed on a region arbitrarily limited to the surface of this oxide layer, an insulation protection film that is laminated and formed on a peripheral portion of the electrode pad and the surface of the oxide layer where a central portion of this electrode pad is exposed, and a metal barrier film that is formed by covering the surface of a central exposed portion of the electrode pad, to prevent the corrosion of an electrode surface when wires are bonded and the electrode pad and wires are connected. This semiconductor device is manufactured by a method including a step of forming an electrode pad on an oxide film, a step of laminating an insulation protection film on the electrode pad and the oxidation film and of implementing patterning by a resist film onto the insulation protection film and for the selective removal of the insulation protection film so that an opening is made in the insulation protection film in a portion on the electrode pad, a step of laminating a metal barrier film on the electrode pad and the resist film, and a step of removing the resist film so that a portion of the resist film in the metal barrier film is removed.
摘要:
A resin composition for bumpers including:(a) 50-65 parts by weight of a propylene-ethylene block copolymer including:(i) 60-75 weight % of a propylene-ethylene block copolymer having an ethylene content of 4-20 weight % and a melt flow rate of 9-30 g/10 min (230.degree. C., 2.16 kg load), and(ii) 40-25 weight % of a propylene-ethylene block copolymer having an ethylene content of 4-20 weight % and a melt flow rate of 40-80 g/10 min (230.degree. C., 2.16 kg load);(b) 40-25 parts by weight of an ethylene-propylene copolymer rubber and/or an ethylene-propylene-diene terpolymer rubber each having an ethylene content of 50-80 weight % and a Mooney viscosity ML.sub.1+4 (100.degree. C.) of 80 or less; and(c) 10-15 parts by weight of high-density polyethylene having a melt index of 1-20 g/10 min (190.degree. C., 2.16 kg load),(a)+(b)+(c) being 100 parts by weight.
摘要:
A two-step process for production of thermoplastic elastomer, which comprises dynamically vulcanizing polypropylene and olefinic rubber in the presence of peroxide (1st step), and dynamically vulcanizing the vulcanized mixture, polypropylene and halogenated butyl rubber in the presence of zinc oxide (2nd step). In another method (a) polyolefin and olefin rubber are dynamically cross-linked in the presence of an organic peroxide and (b) in a separate second operation a dynamically vulcanized blend comprising polyolefin and halogenated butyl rubber is prepared and mixed with (a) to disperse (a) and (b) in one another. The thermoplastic elastomer composition is useful in materials for parts of automobiles.In an example, pp 9 wt. % parts, EPDM 21 wt. % parts, peroxide 0.3 wt. % part and divinylbenzene 0.5 wt. % part were blended and supplied to the first hopper (1) of biaxial extruder as shown in a figure. In the first blending zone (2), temperature and residence time are 200.degree. C. and 60 seconds respectively. And then, to the second hopper (3) of the extruder, pp 50 parts and the vulcanized product (EPDM+chlorinated butyl rubber) 20 parts were supplied and extruded in the heat blending zone (4) above mentioned mixture for 30 seconds of residence time. The physical properties of the composition are MFR: 18, Flex. Mod.: 3,300 (23.degree. C.) and 1,150 (80.degree. C.), Tens. at break: 105, Elong.: 420%, Izod.: No break (room temperature) and 25 (-40.degree. C.) Shore-D: 58, Flow marks: good and paintability: 100/100.
摘要:
A method for controlling testing apparatus having a plurality of device stations for test, a plurality of measuring portions measuring an identical item, and a matrix switch changing a coupling combination between the plurality of the device stations for test and the plurality of the measuring portions, including: performing checking step of a measuring portion with respect to the plurality of the measuring portions, the checking step measuring the measuring portion by measuring a standard device; and performing checking step of a device station for test with respect to the plurality of the device stations for test, the checking step mounting a standard sample on the device station for test and checking the standard sample with use of the measuring portion coupled to the device station for test on which the standard sample is mounted.