What Yest does

YEST Corporation (주식회사 예스티) is a South Korean industrial equipment manufacturer founded in 2000 and listed on KOSDAQ since December 2015, headquartered in Pyeongtaek, Gyeonggi-do. The company designs and builds specialized heat-treatment and thermal-process capital equipment for two established end markets — semiconductor wafer processing (ALD furnaces, diffusion furnaces, VF300 vertical furnaces, D2 anneal/passivation, TSV, wafer cure, autoclaves, nEFEM, chillers, hot/cold test chambers, Smart Storage) and display panel manufacturing for OLED/AMOLED/LCD/LED customers (laminators, film auto laminators, slit die coaters, FPDF furnaces, convection ovens, vacuum drying ovens, mobile autoclaves, UV cure, oxide furnaces). In 2022 it diversified into a third business — Anion Exchange Membrane (AEM) water electrolysis systems for green hydrogen production, anchored by a 1 MW-class AEM Multicore system and smaller AEM Cluster units — and is also developing higher-end R&D tools such as a 300 mm ALD furnace for high-k dielectrics.

YEST makes money primarily through quote-based, project-driven B2B capital equipment sales. Its largest disclosed commercial signal is a KRW 22.8 billion (approx. USD 17 million) semiconductor equipment order from Samsung Electronics announced in June 2026, and pricing for individual units is not publicly disclosed. Go-to-market is enterprise field-sales to Tier 1 fabs, supplemented by event-driven demand generation at industry exhibitions (SEMICON KOREA 2022 and 2023, H2 MEET 2022) and by reference installations in the hydrogen segment (e.g., Korea's largest green hydrogen demonstration project in April 2022 and the Phi Suea House project in Thailand). The company is led by co-CEOs Jang Dong-bok (장동복) and Kang Im-su (강임수), runs an R&D center alongside headquarters in Pyeongtaek, and maintains affiliated entities YH Technix, Yes Diamond, and HK Materials whose ownership relationship to YEST is not disclosed in the source material. Revenue, headcount (101-250), and a KRW 10.4 billion paid-in capital as of December 2024 indicate a small-cap public company, and the supplied multi-year financials rows appear inconsistent with these scale indicators and were not used for analysis.

Name

Yest

Legal name

주식회사 예스티 (YEST Corporation)

Website

https://yest.co.kr

Company type

Public

Founded year

2000

Operating status

Operating

Headcount range

101–250 employees

Short description

YEST Corporation is a South Korean capital-equipment OEM founded in 2000 that designs heat-treatment and process tools for semiconductor and OLED/AMOLED display fabs, and since 2022 also builds AEM water electrolysis systems for green hydrogen, selling primarily to Tier 1 manufacturers such as Samsung Electronics via enterprise contracts.

Ownership category

akta.pro rank

Product category

Semiconductor and Display Manufacturing Equipment

NAICS

Semiconductor and Other Electronic Component Manufacturing (33441), Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing (333415)

SIC

Industrial Process Furnaces & Ovens (3567), Special Industry Machinery (No Metalworking Machinery) (3550)

akta.pro primary industry

Logic Foundries (Advanced Nodes) (HDAHACAA)

akta.pro secondary industry

Thin-Film Deposition Materials (PVD/CVD/ALD Targets & Precursors) (HDAHAGAH)

Keywords

• Semiconductor equipment
• Display manufacturing equipment
• Hydrogen electrolysis systems
• Heat treatment furnaces
• Thin film deposition

Headquarters

HQ city

Pyongtaek

HQ country

South Korea

HQ region

Asia

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Technology or R&D, Personnel, Marketing or Sales

Revenue model

1. Capital Equipment Sales — Semiconductor: Sale of semiconductor manufacturing equipment (ALD furnaces, diffusion furnaces, nEFEM, anneal/passivation, chillers, autoclaves, TSV, wafer cure, hot/cold test chambers, Smart Storage). Large contract wins such as the KRW22.8 billion Samsung Electronics order indicate project-based / unit-priced enterprise sales.
2. Capital Equipment Sales — Display (OLED/AMOLED): Sale of display manufacturing equipment including laminators, film auto laminators, slit die coaters, FPDF furnaces, convection ovens, VDO, mobile autoclaves, UV cure systems, and oxide furnaces for LCD/AMOLED/LED panel production.
3. Capital Equipment Sales — Hydrogen (AEM Electrolyzers): Sale of AEM water electrolysis systems (AEM Multicore 1MW-class and AEM Cluster ≤200kW), plus supporting dryers and water tanks, for green hydrogen production projects such as Korea's largest green hydrogen demonstration project.
4. Parts and Materials Sales: Sale of equipment parts and materials supporting the installed base of YEST equipment (e.g., bib and zener parts shown on the ETC page).

Pricing tiers

Go-to-market motion3 records

Core offering

YEST designs, manufactures, and sells specialized industrial capital equipment for three end-markets: (1) semiconductor heat-treatment and process equipment (ALD furnaces, diffusion furnaces, VF300, nEFEM, TSV, anneal/passivation, chillers, autoclaves, Smart Storage); (2) display panel manufacturing equipment for OLED/LCD/AMOLED/LED producers (laminators, slit die coaters, oxide/FPDF furnaces, UV cure, autoclaves); and (3) Anion Exchange Membrane (AEM) water electrolysis systems for green hydrogen production (1 MW Multicore and ≤200 kW Cluster systems). The company also sells parts and materials (BIB, Zener) under its ETC line to support its installed base.

Product overview

YEST Corporation's offering is a diversified industrial-equipment portfolio organized as three primary business segments plus an R&D pipeline, rather than a single unified product. The Semiconductor segment centers on the company's core heat-transfer / thermal-processing expertise and includes the Diffusion Furnace, VF300, Oxide Furnace, FPDF Furnace, D2 Anneal Passivation, TSV (Through-Silicon Via), nEFEM (entered 2021), Wafer Cure, Autoclave, Hot/Cold Test Chamber, Chiller (with Chiller SD single/dual variant), NEOCON, VPI, and Smart Storage systems. The Display segment (serving OLED / LCD / AMOLED / LED manufacturers) comprises the Main Laminator, Film Auto Laminator, Slit Die Coater, Convection Oven, VDO Vacuum Drying Oven, Autoclave Mobile, UV Cure, and the in-development Low Vacuum PCO. The Hydrogen segment, added through market diversification starting 2022, is built on Anion Exchange Membrane (AEM) technology and is anchored by the 1 MW AEM Multicore system, with the smaller AEM Cluster (up to 200 kW) and the EL4 electrolysis module, plus supporting Dryer and Water Tank components. A fourth ETC category provides parts and materials (BIB, Zener). R&D efforts include the ALD Furnace for high-k atomic-layer deposition on 300 mm wafers. YEST is positioned as a strategic manufacturer emphasizing Credibility, Communication, and Win-win, with stated proprietary source technology for Display (OLED) and Semiconductor heat-transfer equipment.

Differentiator

Problem solved

Functional benefit

Brands

• YEST: Brand identity used across semiconductor, display, and hydrogen (AEM electrolysis) equipment lines under the tagline 'YES Technology'.

Products and services

• AEM Multicore 1 MW class large-capacity Anion Exchange Membrane (AEM) water electrolysis system. Produces up to 210 Nm³/h (452.97 kg/24h) of hydrogen at 99.8% purity (99.999% with dryer), with power consumption of 1,008 kW (4.8 kWh/Nm³), operating pressure up to 35 bar, hot start in seconds, cold start within 30 minutes. Footprint W16m × D3m × H7.3m. Targeted at green-hydrogen project developers and energy companies.
• AEM Cluster Small-to-medium capacity AEM water electrolysis system for outputs up to 200 kW. Produces up to 36 Nm³/hr (77 kg/day) of hydrogen at 99.9% purity (99.999% with dryer). Footprint 2.44m × 6.06m × 2.59m. Targeted at distributed hydrogen production installations.
• AEM Electrolyser EL4 2.4 kW class AEM water electrolysis module that serves as the building block for larger AEM Multicore and Cluster systems. Exhibited at H2 MEET 2022 to demonstrate YEST's hydrogen production technology.
• Dryer (Hydrogen System) Dryer component used with AEM electrolysis systems to raise hydrogen purity from 99.8–99.9% to 99.999%.
• Water Tank (Hydrogen System) Water tank component for AEM water electrolysis hydrogen production systems.
• ALD Furnace Atomic layer deposition furnace for 12" (300mm) wafers performing precise atomic-layer thin-film deposition with controlled temperature, pressure, flow rate, and vaporization. Supports high-k ALD processes (single film, composite film, multi-component dielectric films) with process materials N2, O3, ZrO2, HfO2, H2O2, TMA at 200–350°C. Optional dry pump, plasma, O3 generator, and scrubber.
• nEFEM New Equipment Front End Module product line entered by YEST in 2021 to broaden its semiconductor equipment portfolio beyond heat-transfer and furnace systems.
• VF300

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• Wonik IPS: Korean semiconductor equipment maker offering ALD, diffusion, and wafer-processing tools to Samsung and SK. Closest Korean peer in semiconductor thermal process and ALD, competing head-to-head for the same anchor customers.
• Top Engineering: Korean display equipment maker focused on OLED panel manufacturing tools including laminators and autoclaves. Directly competes with YEST in the display segment and shares a similar customer base of Korean panel manufacturers.
• Nel ASA: Norwegian hydrogen electrolyzer specialist and one of the most direct comparables for YEST's AEM electrolyzer business, with commercial-scale alkaline and PEM/AEM product lines competing in the same green hydrogen project pipelines.
• Jusung Engineering: Korean KOSDAQ-listed semiconductor and display equipment maker with overlapping product lines in ALD, diffusion, and TFT process tools. Most directly comparable peer in terms of size, business mix, and Korean fab customer base.
• Enapter: Germany-based AEM electrolyzer specialist (closely related to the Enpater technology affiliation noted for YEST). Direct AEM-architecture peer competing in modular green hydrogen deployments.
• SFA Engineering: Korean equipment maker serving semiconductor, display, and secondary-cell manufacturing. Comparable in scale, listed status, and broad Korean manufacturing equipment portfolio with similar customer mix.
• PSK Holdings: Korean semiconductor and display equipment supplier with heat-treatment, etching, and process tool exposure serving Korean memory and panel fabs. Comparable in scale, customer overlap (Samsung/SK), and equipment category mix.
• AP System: Korean display and semiconductor equipment manufacturer specializing in OLED panel process tools, autoclaves, and laminators. Directly comparable in the display segment and a key domestic competitor in YEST's main laminator / autoclave line.

Broad incumbents

• Applied Materials: Largest global semiconductor and display equipment maker, dominant in deposition (including ALD) and related process tools. Defines competitive benchmarks for throughput, software, and global service that YEST must match.
• Tokyo Electron: Global top-3 semiconductor equipment OEM with broad portfolio spanning deposition, etch, lithography, and cleaning. Sets the competitive ceiling for Korean niche suppliers like YEST in advanced thermal process and ALD tools.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/yest-co-ltd

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries3 records

Funding overview

Funding rounds1 record

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Yest