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Frequency and impulse responses of cast resin transformer windings are presented. The stress arising during lightning impulse test is compared with that originated during switching operations, in case of oscillating transients.
In the competition of market share of quad flat no-lead (QFN) package, there were several improvement methods being utilized, such as leadframe design for higher density, cheaper tape, and more functionalities per chip (with smaller package size, larger die, and smaller pad size). Most of these improvement methods created extremely weak die attach and wire bonding structures, causing significant amount...
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