منابع مشابه
Ultrasonic friction power during Al wire wedge-wedge bonding
Al wire bonding, also called ultrasonic wedge-wedge bonding, is a microwelding process used extensively in the microelectronics industry for interconnections to integrated circuits. The bonding wire used is a 25 m diameter AlSi1 wire. A friction power model is used to derive the ultrasonic friction power during Al wire bonding. Auxiliary measurements include the current delivered to the ultraso...
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Cones and wedges inserted between an ultrasonic transducer and the specimen provide the transducer (circular or rectangular shape) with enhanced capability for point or line contact with the specimen. Such an arrangement is useful in that the transducer can be used for transmitting to and receiving from a point (or line) source, and that it can eliminate the undesirable aperture effect that mak...
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1. The strain of Bacterium coli used in these experiments multiplies in distilled water at pH 6.0 and pH 8.0 and in Ringer-Locke solution at pH 6.0. Under all the other conditions studied the numbers decrease with the passage of time. 2. The electrophoretic charge of the cells is highest in distilled water at pH 6.0 and pH 8.0. Under all other conditions studied the velocity of migration is dec...
متن کاملRoom temperature wedge-wedge ultrasonic bonding using aluminum coated copper wire
The purpose of our study is to evaluate the feasibility of room-temperature wedge-wedge bonding using commercially available 25 μm copper wires, coated with aluminum. Bonding quality, reliability and aging resistance of the wire bonds have been investigated using standard wire pull tests immediately after bonding and after accelerated life tests, including temperature storage at 125 °C and 150 ...
متن کاملIntra-Capsular Tonsillotomy by Ultrasonic Method
Today’s physicians are paying more attention to enlarged tonsils, realizing that this upper airway obstruction leads to obstructive sleep disordered breathing in children, the cause of a myriad of behavioral and health problems. The conventional treatment for this medical condition is complete removal of the tonsils (total tonsillectomy) by a variety of surgical procedures (cold dissection, ele...
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ژورنال
عنوان ژورنال: Coastal Engineering Proceedings
سال: 1966
ISSN: 2156-1028,0589-087X
DOI: 10.9753/icce.v10.79