Kim Y.H. – Page 2 – TechConnect Briefs

A lattice Boltzmann study of the non-Newtonian blood flow in stented aneurysm

Kim Y.H., Farhat S., Lee J.S., Wayne State University, US

The treatment of cerebral aneurysms with a minimally invasive porous stent has recently been proposed to prevent rupture and favor coagulation mechanism inside the aneurysm. But, an irregularly shaped and wide-necked aneurysm makes current stent [...]

Ultra-thin Nanocomposite Membranes for Highly Sensitive Sensors

Kang T.J., Jang E.Y., Lee J-H., Kim Y.H., Seoul National University, KR

Highly sensitive sensor arrays are critical for prospective devices and demanded for various applications. Measuring microscopic deflections with sensitive membranes is one of the most versatile approaches for pressure, acoustic, chemical and biomolecular sensing. Here [...]

A Simple and Direct Biomolecule Detection Based on a Microwave Resonator

Kim H-S, Kim Y.H., Kim Y.J., Yoon S-I, Park S., Kim H-S, Kim Y.H., Kim Y.J., Kim H-S, Kim Y.H., Kim Y.J., Jung H-I, Yonsei University, KR

We report a simple and direct biomolecule detection method, sensitivity enhancing technique, and its characterization realized by using a CPW-to-slotline ring resonator whose resonant frequency is 3.4 GHz. When a biomolecule is attached on the [...]

Field emission characteristics of carbon nanofibers grown on the electroplated copper micro-tips

Sung W-Y, Kim W-J, Kim Y.H., Lee H.Y., Lee S.M., Yoo H-S, Lee H.Y., Lee S.M., Joo S-K, Kim W-J, Kim Y.H., Seoul National University, KR

Carbon nanofibers (CNFs) were synthesized on micro-copper tips by using direct current plasma enhanced chemical vapor deposition of C2H2 and NH3 gas at 480℃. The copper micro-tips were uniformly formed by high current electroplating and [...]

Nano-bending Method to Identify the Residual Stresses of MEMS Films

Kim J.G., Kim J.H., Kim Y.H., Kim J.G., Kim J.H., Kim Y.H., Hahn J.H., Lee H.Y., Kim J.G., Kim J.H., Kim Y.H., Seoul National University, KR

Surface micro-machined MEMS frequently suffer from the residual stress which might significantly decrease the performance and reliability of micro devices. It is important to accurately measure the residual stresses at manufacturing step. The Stoney’s equation [...]

High Resolution Silicon Accelerometer Using Eutectic Bonding

Kwang Y., Yeon J.C., Kim Y.H., Rhee S.W., Oh S.H., Seoul National University, KR

High precision micro-accelerometers are used in many applications such as automotives, aviations and aerospace navigation systems. In this paper, a lateral capacitive micro-accelerometer with _g level resolution has been designed and fabricated using simple micromachining [...]

Low Damping Differential-Capacitive Sensing Comb

Yeon S.C., Jeon Y.K., Kim Y.H., Seoul National University, KR

In the present study, a specially designed sensing comb is proposed for low damping and high capacitance. Many researchers have proposed high aspect ratio single crystal silicon structure to improve sensitivity in capacitive sensing and [...]