YEST regards the voices of our customers and partners as our most valuable asset.
From product technical support to partner assistance, visit reservations, and security reports — the right department responds promptly and accurately to the nature of your inquiry.
For inquiries on the installation, maintenance, and technical support of semiconductor, display, and hydrogen equipment, please contact our Sales & Product team.
yest@yest.co.kr
Tel. 031-612-3333
For partner registration, purchasing, and quality-related inquiries, please contact us below and the relevant department will review and respond.
yest@yest.co.kr
The Headquarters and R&D Center include cleanrooms and semi-cleanrooms, so a visit reservation is required in advance.
Please register your visit schedule through the visitor registration system.
For general inquiries about products, careers, and investment, please use our online inquiry page.
Submitted inquiries are automatically forwarded to the relevant department.
Beyond fraudulent transactions, code-of-ethics violations, and information security, you can also report misconduct (abuse of power, sexual harassment, workplace harassment) anonymously.
The identity and contents of the reporter are kept confidential.
yest@yest.co.kr
Check the location of our Headquarters and R&D Center along with guidance on public transportation and driving.
Please refer to the directions before your visit.
We respond to our customers' trust
with fast and accurate answers.
Whatever your inquiry, we connect you directly to the department that knows it best.
Please choose the type that fits your inquiry.
Inquiries on the specifications and adoption of semiconductor, display, and hydrogen equipment, and on installation, maintenance, and process technical support.
yest@yest.co.kr · 031-612-3333 Contact Us →Inquiries related to job applications, including regular and ongoing recruitment, how to apply, the selection process, and working conditions.
yest@yest.co.kr Careers Guide →IR information and investment inquiries as a KOSDAQ-listed company, including business results, disclosures, and shareholder matters.
yest@yest.co.kr · IR & Disclosure Board View IR & Disclosures →Partnership proposals, media coverage, PR, and all other general inquiries not covered by the types above.
yest@yest.co.kr Contact Us →
