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CEO of YEST
Jang Dong-bok
Heat-Treatment Engineer of 25 Years Faces HPSP Patent Risk
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Last Updated on Jul 20, 2026
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CEO of YEST
Life Summary
Jang Dong-bok is the CEO of YEST.
He is working to develop YEST into a global total solution equipment provider through a diversified portfolio spanning semiconductors, displays, and environmental safety materials.
He was born in April 1969 in Chuncheon, Gangwon Province.
He graduated from Chuncheon High School and Incheon Polytechnic College, now JEI University.
He worked in the semiconductor industry at companies including Sejong Semiconductor and KC Tech.
In 2000, he founded Youngin Tech, the predecessor of YEST.
He is one of the founders of Korea’s materials, parts, and equipment industry who helped localize semiconductor and display manufacturing equipment.
#JangDongbok #YEST #semiconductors #displayequipment #manufacturingequipment #environmentalsafety #materialscomponentsandequipment #equipmentlocalization #YounginTech #Koreanentrepreneur
He is working to develop YEST into a global total solution equipment provider through a diversified portfolio spanning semiconductors, displays, and environmental safety materials.
He was born in April 1969 in Chuncheon, Gangwon Province.
He graduated from Chuncheon High School and Incheon Polytechnic College, now JEI University.
He worked in the semiconductor industry at companies including Sejong Semiconductor and KC Tech.
In 2000, he founded Youngin Tech, the predecessor of YEST.
He is one of the founders of Korea’s materials, parts, and equipment industry who helped localize semiconductor and display manufacturing equipment.
#JangDongbok #YEST #semiconductors #displayequipment #manufacturingequipment #environmentalsafety #materialscomponentsandequipment #equipmentlocalization #YounginTech #Koreanentrepreneur