Congratulations on your 60th birthday, my advisor~!

Senior Secretary of the National Assembly~! 👍

Best Friends~!

Bang Bang ??

Best brother

Cute Yuna

Coach, Gwangju FC

Yang-Kyu Choi and Boys

Happy Birthday

Happy Birthday

Their autumn by the riverside

♥Olympic Park

Good Friend

Children

with Dr. Sang Woo Lee (TEL Fellow)

with Prof. Gang Qiu

(Univ. of Minnesota)

The Avengers

with Prof. Bharat Jalan, Prof. Gang Qiu, and lab. members

Members, SAIT (Samsung Electronics), S. Korea

Chicago River

Prof. Peide Ye Group,

Purdue University

Birck Nanotechnology Center,

Purdue University

ASCENT Annual Review,

University of Notre Dame

Wabash Football Club,

Purdue University

Purdue Boilermakers Football

Prof. Yang-Kyu Choi Group, KAIST

Ph.D. Lab Members

With Prof. Chenming Hu (U.C. Berkeley) and Dr. Jin-Woo Han (Samsung) in IEDM

IEEE Electron Device Society(EDS) Ph.D.  Student Fellowship Award in IEDM

Ph.D. Lab Members, KAIST

Night View of Chicago

UC Berkeley

Interlaken

SID Paper Award,

Distinguished Poster Paper

Military Service