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We develop novel micro-bumping technology to realize small size, fine pitch and uniform height Cu/Sn bumps. Electroplated-evaporation bumping (EEB) technology, which is a combination of Cu electroplating and Sn evaporation, is developed to achieve uniform height of Cu/Sn bumps. We develop CMOS compatible dry etching processes for removing sputtered Cu/Ta layers to achieve small size and fine pitch...
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