Composition of the Audit Committee

An audit committee has been established and operated on behalf of full-time auditors since 2019, and it currently consists of three outside directors independent from the company. We conduct separate training and self-evaluation on changes in internal control and internal accounting management system at least once a year in order to secure the expertise of the audit committee members.

Name Outside director or not Career Term of office
Director Oh-chul Kwon
(Chairperson of
the committee)
 Outside Director Board Member of Cypress Semiconductor
Adviser, SK Hynix
Executive President & CEO, SK Hynix
Chairman, Korea Semiconductor Industry Association 		From March, 24, 2022 to the annual general meeting of shareholders in 2025
Director
Dong-Gun Park 		Outside director Special Adjunct Professor, Electrical & Electric Engineering, Sogang University
Advisor, Samsung Display
Executive President, Display Innovation, Samsung Electronics
President & CEO, Samsung Display 		From March, 24, 2022 to the annual general meeting of shareholders in 2025
Director
Hyung-Jun Kim 		Outside director Professor, Electrical & Electronic Engineering, Yonsei University
Head of Yonsei University BK21 Y-BASE Education Research Department
Head of Research Support on Localization of ALD Materials and Parts for 10nm Semiconductor Devices,
Ministry of Trade Indusrty and Energy (Materials, Parts & Equipments Innovation Lab)
Head of BIT Fab, Yonsei University
Head of Air Liquide Yonsei Collaboration Center 		From March, 24, 2022 to the annual general meeting of shareholders in 2025

Audit Committee Activities

Date Contents discussed Approved or not Attendance
February 22, 2023 - Report on FY2022 financial statements and annual business report
- Report on external audit results in 2022
- Report on the operating status of the internal accounting management system
in 2022
- Report on the agenda of the 7th annual general meeting of shareholders
- Resolution of audit report
- Evaluation on the operating status of the internal accounting management system
in 2022
- Evaluation on the operating status of the internal monitoring system 		Reported
Reported
Reported

Reported
Approved
Approved

Approved 		3(3)
April 27, 2023 - Report on schedule and direction of external audit in 2023
- Report on the operation plan of the internal accounting management system in 2023
- Evaluation on the external audit in 2023 		Reported
Reported
Reported 		3(3)
July 19, 2023 - Report on key audit matters in 2023
- Approval of amendments to the internal accounting management regulations 		Reported
Approved 		2(3)
Date Contents discussed Approved or not Attendance
February 23, 2022 - Report on FY2021 financial statements and annual business report
- Report on the operating status of the internal accounting management system in 2021
- Report on external audit results in 2021
- Report on the agenda of the 6th annual general meeting of shareholders
- Resolution of audit report
- Evaluation on the operating status of the internal accounting management system in 2021
- Evaluation on the operating status of the internal monitoring system 		Reported
Reported
Reported
Reported
Approved
Approved
Approved 		3(3)
March 24, 2022 - Appointment of the chairperson of the audit committee Approved 3(3)
April 27, 2022 - Report on schedule and direction of external audit in 2022
- Report on the operation plan of the internal accounting management system in 2022 		Reported
Reported 		3(3)
July 20, 2022 - Key audit matters in 2022 by external auditor
- Report on the operating status of the internal accounting management system 		Reported
Reported 		2(3)
October 26, 2022 - Report on progress of external audit and key audit matters in 2022
- Guidelines for appointment of auditor 		Reported
Approved 		3(3)
Date Contents discussed Approved or not Attendance
February 24, 2021 - Report on FY2020 financial statements and annual business report
- Report on the operating status of the internal accounting management system in 2020
- Report on external audit results in 2020
- Evaluation on the operating status of the internal accounting management system in 2020 		Reported
Reported
Reported
Approved 		3(3)
April 28, 2021 - Report on schedule and direction of external audit in 2021
- Report on the operation plan of the internal accounting management system in 2021 		Reported
Reported
 3(3)
July 21, 2021 - Key audit matters in 2021 by external auditor Reported 3(3)
October 22, 2021 - Report on progress of external audit and key audit matters in 2021
- Guidelines for appointment of auditor 		Reported
Approved 		3(3)
December 14, 2021 - Selection of external auditor Approved 3(3)
Date Contents discussed Approved or not Attendance
February 24, 2020 - Report on FY2019 financial statements and annual business report
- Report on the operating status of the internal accounting management system in 2019
- Report on audit results on external auditor in 2019 		Reported
Reported
Reported 		3(3)
April 22, 2020 - Approval of amendment of regulations on internal accounting management system
- Report on plans for external audit and key audit matters in 2020
- Report on audit plan on internal accounting management system
- Discussion of review results in the first quarter of 2020 		Approved
Reported
Reported
Reported 		3(3)
August 19, 2020 - Report on audit status on internal accounting management system
- Discussion of the results of the 2020 semi-annual review 		Reported
Reported 		3(3)
November 25, 2020 - Report on progress of external audit in 2020
- Discussion of review results in the third quarter of 2020 		Reported
Reported 		3(3)
Date Contents discussed Approved or not Attendance
February 22, 2019 - Approval of amendments to the BOD regulations
- Enactment and approval of regulations on audit committee
- Approval of amendments to the internal accounting management regulations
- Appointment of the chairperson of the audit committee 		Approved
Approved
Approved
Approved 		3(3)
March 06, 2019 - Report on FY2018 financial statements and annual business report
- Report on the operating status of the internal accounting management system in 2018
- Review of the 3rd annual general meeting of shareholders agenda 		Reported
Reported
Reported 		3(3)
April 22, 2019 - Report on business performance in the first quarter of 2019 Reported 3(3)
July 15, 2019 - Report on plans for external audit and key audit matters
- Report on business performance in the second quarter of 2019 		Reported
Reported 		3(3)
October 14, 2019 - Report on business performance in the third quarter of 2019 Reported 3(3)