摘要:
The invention relates to a semiconductor component having a semiconductor body (100) and at least one pn junction present in the semiconductor body (100) and an amorphous passivation layer (70) arranged at least in sections on a surface (101) of the semiconductor body (100), the following holding true for the minimum Ds,min of an interface state density Ds at the junction between the passivation layer (70) and the semiconductor body (100): D s , min ≥ N S , Bd E g where NS,Bd is the breakdown charge and Eg is the band gap of the semiconductor material used for the semiconductor body (100).
摘要:
A sonotrode for an ultrasonic welding device has an ultrasound generator that supplies high-frequency electrical energy to a converter that converts this energy into mechanical vibrations and conveys the latter, optionally via a booster, to a sonotrode (2). The sonotrode (2) is formed with a contact surface (3). In order to avoid troublesome sink marks, pegs (1) are arranged on the contact surface (3).
摘要:
A method for connecting an electronic components to a carrier substrate is described. At least one pad of the component is connected electrically conductively to at least one pad on an upper surface of the carrier substrate. A solder bump is deposited on at least one of the pads to be connected, the component is alignedly mated with the carrier substrate, and the at least one solder bump is soldered in order to wet the contact surfaces. It is provided that during the soldering, the at least one solder bump is deformed within the contacting plane in such a way as to achieve a degree of deformation that permits the two-dimensional analysis of said degree of deformation by a radiograph of the interconnection site.
摘要:
Apparatus for bending steel bars to form concrete reinforcement elements, having a device (3, 4; 18) for feeding bars to a transfer device (8), by means of which in each case one group of bars can be inserted in two bending frames or stations, (2, 2'), each having members (11, 12) for bending the bars in transverse direction the transfer device having at least one pair of operation-controlled gripper tongs (10) which can be swivelled from a first position, in which they receive a plurality of bars from the bar feed device, and clamp the bars, into a second position, in which they insert the bars into the gap between the bending members.
摘要:
A screen lining is disclosed which includes at least two screen elements (1), a supporting substructure (6), a plastic section (5) and bolts (10). The screen elements (1) each have a lateral edge and are positioned next to one another. The plastic section (5) has an upper region (4), an underside, and extends above and parallel to the substructure. Included within plastic section (5) are a plurality of projections (7) positioned along the plastic section underside which are fastened with a locking effect to the substructure. Also inlcuded within the plastic section is a plurality of vertical orifices (9) centrally positioned at intervals within that section and passing coaxially through the projections (7). Bolts (10) are inserted from above with a locking effect into the orifices. Each bolt includes a bolt head (12) which forms a portion of the plastic upper region (4).
摘要:
A flat sieve, or a part thereof, has a flat body of elastic material with a rectangular (or square) frame spanned by a plate of lesser depth with a multiplicity of throughgoing parallel slots and intervening rows of shorter slots interrupted by solid transverse webs which are integral with crossbars intersecting only the lower portions of the longer, throughgoing slots. The length of the shorter slots may be about one-tenth that of the longer slots.
摘要:
A method and an apparatus for measuring the closing and holding force on the moulding die or tool (6, 7) of a pressure diecasting or injection moulding machine of which the closing device comprises a toggle lever mechanism. Measurement of the closing and holding force takes place by way of measuring a deformation of that end plate (4) on which the bars (1) and the toggle lever mechanism (10) are supported. The bars (1) and the toggle lever mechanism (10) transmit to the end plate (4) forces which produce a bending moment. The bending moment leads to a comparatively large deformation which is therefore readily measured by a measuring device (14, 24) associated with the end plate. By arranging the measuring device (14, 24) at the end plate (4), one also avoids damage to the measuring device (14, 24) by the movable parts of the closing device and access to the pressure diecasting or injection moulding machine by the operator is not impeded (FIG. 1).
摘要:
An electric lamp, particularly a halogen cycle lamp, adapted to be used as dual filament automotive lamp which has an opaque end cap coated on the hard glass bulb. The end cap coating comprises a mixture of carbonyl iron powder and silicon powder, preferably in a ratio of between 1.5:1 and 4:1 (by weight) and more preferably in a ratio of about 2:1. The lamps have the important advantages of excellent utility during service coupled with the ability to be manufactured at relatively low burning in temperatures, i.e. in the order of about 530.degree. C.
摘要:
A convenient, useful and efficient method and apparatus for determining the amount of alcohol contained in fuels. It is particularly useful for measuring the alcohol content of jet fuel, and is practiced by mixing a known amount of the fuel to be measured with a known amount of emulsion, the emulsion comprising a known amount of 8-Hydroxyquinoline ester of the O-vanadic acid. A resulting reaction causes a portion of the mixture to discolor, the amount of discoloration indicating the alcohol content of the fuel. This process can be performed in an apparatus comprising a tube with all of the necessary chemicals pre-mixed, thereby only requiring the addition of the fuel to be tested. Such an apparatus can be prepared in advance, sealed, and stored for a period of up to 2 years.