Choong D. Yoo

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Although the groove and slot have been widely utilized for horn design to achieve high uniformity, their effects on uniformity have not been analyzed thoroughly. In this work, spool and bar horns for ultrasonic bonding are designed in a systematic way using the design of experiments (DOE) to achieve high amplitude uniformity of the horn. Three-dimensional(More)
PURPOSE To evaluate the effects of different methods of head elevation on intraocular pressure (IOP) in healthy young subjects. METHODS Twenty-four healthy young Korean subjects were included in this prospective observational study. The IOP measurements were taken with the subjects in the sitting position and in the supine positions with the head flat and(More)
An edge traces technique in the wafer level is proposed and implemented in this work, which can be applied to the fabrication of the stack chip. Experiments were conducted by stacking four test chips 100 thick, and the configuration of the pad is based on the memory chip from the electronics company. The chips for stacking were fabricated successfully(More)
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