Date : 2018/12/19, Hit : 40
제목    New Doctoral Thesis of vibration assisted femtosecond laser micro processing from UST-KIMM.
작성자   S.H.Cho

Dear Colleagues and Friends,

I am pleased to inform our new Doctoral thesis of vibration assisted femtosecond laser micro processing.

The name of the graduate and the title of the dissertation are as follows.

Name of graduate : Dr. Wonsuk Choi, E-mail:
Title of the dissertation : Vibration assisted femtosecond laser Invar36 hole drilling processing and Ag nano-particle synthesis by laser ablation in liquid

Supervisor : Prof. Sung-Hak Cho

Related quantitative result : 9 SCI(E) Papers, 3 Domestic Papers, 9 Patents, 14 International Talks, 39 Domestic Talks, IP Transfer : 1.3 Billions (Korea won)
Publications (SCI(E))
1. "Ablation depth control with 40 nm resolution on ITO thin film using a square, flat-top beam shaped femtosecond laser” Optics and Lasers in Engineering, 84, 44-50 (2016)
2. "Vibration-Assisted Femtosecond Laser Drilling with Controllable Taper Angles for AMOLED Fine Metal Mask Fabrication" Materials, 10, 212 (2017)
3. "Fully Solution-Processable Fabrication of Multi-Layered Circuits on a Flexible Substrate Using Laser Processing" Materials, 11, 268 (2018)
4. "Morphologies of femtosecond laser ablation of ITO thin films using Gaussian or quasi-flat top beams for OLED repair" Applied Physics A, 457, 123 (2018)
5. "Ridge minimization of ablated morphologies on ITO thin films using squared quasi-flat top beam" Materials, 11, 530 (2018)
6. “Spontaneous Shape Alteration and Size Separation of Surfactant-Free Silver Particles Synthesized by Laser Ablation in Acetone during Long-Period Storage” nanomaterials 8, 529 (2018)
7. "Magnetic Fe@FeOx, Fe@C and α-Fe2O3 Single-Crystal Nanoblends Synthesized by Femtosecond Laser Ablation of Fe in Acetone" nanomaterials, 11, 268 (2018)
8. “Two Birds with One Stone: Spontaneous Size Separation and Growth Inhibition of Femtosecond Laser-Generated Surfactant-Free Metallic Nanoparticles via ex Situ SU-8 Functionalization” ACS Omega, 3, 10953 (2018)
9. “Formation of Permanent Brown-colored Patterns in Transparent BK7 Glass upon Irradiation with a Tightly Focused Femtosecond Laser”, Research & Reviews: Journal of Material Sciences, 6, 1, 35-38, (2018)

Dr. Wonsuk Choi is the 4th doctoral graduate of our laboratory, and former graduates are currently working as researchers at Samsung, LG.

This Ph.D. degree was partially financed by the Korean government and Samsung Display Co.

Thank you for your continued interest and support.
Always welcome technical inquiries and project meetings.

I wish you a Merry Christmas and a Happy New Year.

Best Regards,

Sung-Hak Cho
Sung-Hak CHO Professor, Ph.D/Principal Research Engineer
Head, Femto Process Lab. (UST-KIMM, Korea Univ. of Science and Technology)
Department of Laser & Electron Beam Application
KIMM (Korea Institute of Machinery & Materials)
156 Gajeongbuk-Ro, Yuseong-gu, Daejeon 34103, Korea
Tel: +82-42-868-7077, Fax: +82-42-868-7431
한국과학기술연합대학원 (UST) 나노메카트로닉스전공 교수 (전임)
日本 理化學硏究所(RIKEN) Laser Tech. Lab.客員硏究員
Chair, Korea-Germany International Technology Network for Future Laser Manufacturing

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