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There is growing interest in Cu wire bonding for LSI interconnection due to cost savings and better electrical and mechanical properties. Conventional bare Cu bonding wires, in general, are severely limited in their use compared to Au wires. A coated Cu bonding wire (EX1) has been developed for LSI application. EX1 is a Pd-coated Cu wire to enhance the bondability. Bond reliability at a Cu wire bond...
Pad cratering is one of the dominant failure modes that occur in various board level reliability tests, especially under the dynamic loading. In recent years, the increasing propensity of pad cratering due to the implementation of the lead-free technology calls for the necessity of re-assessment of PWB qualification related to the pad cratering resistance. The objective of the present study is to...
The work described here was carried out over several veal's. It resulted in the development of a Class F (155 °C) insulation system, as well as gained fundamental knowledge of turn insulation capabilities. The simulated service test described here was a basic part of this program and established itself as an outstanding tool for determining system performance. The detailed conclusions of this work...
The rapid and varied growth of modern technology has created many new requirements for large industrial motors employing form-wound pre-insulated coils. In an increasing percentage of these applications a motor is required to operate with a high degree of reliability under severe environmental conditions that may adversely affect the insulation system of the machine.1,2,15,4,5,6 Further, the trend...
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