Enpulse

Enpulse is Korea's leading domestic producer of CMP polishing pads, the polyurethane consumable used with slurry to planarize wafers after deposition, etch and lithography. It started in 2015 as an import-substitution project inside SKC and broke into a market where two U.S. suppliers have historically held more than 90% of global share. It qualified pads at Korean memory and foundry fabs and, by its own account, overtook DuPont as the leading pad supplier at a major Korean customer in March 2021. Its differentiators are in-house prepolymer and additive synthesis, a hybrid pore system that combines solid microspheres with inert-gas foaming, single-sheet casting, and a highly automated Cheonan plant. Since the 2025 carve-out under Hahn & Company, Enpulse has been a standalone pure-play pad company. It is widening qualifications to Chinese and Taiwanese chipmakers, building a Yongin R&D center, and marketing VDC-free, MOCA-free, chlorine-reduced and bio-based pads. Its scale is small next to the market leaders. Last disclosed annual revenue was KRW 40.3 billion (FY2023).

Relationship to "SK enpulse": Global CMP pad market studies, including the Global CMP Pads Market reports, list this business as "SK enpulse." Until April 2025 the CMP pad operation was a division of SK enpulse Co., Ltd. (formerly SKC Solmics, KOSDAQ: 057500), a wholly owned semiconductor-materials subsidiary of SKC Co., Ltd. (KRX: 011790). Private equity firm Hahn & Company agreed to buy the division in December 2024 through a special-purpose company, Hahn & Co No. 32 Co., Ltd. The deal closed on 4 April 2025 at KRW 334.6 billion, and the acquiring company took the name Enpulse Co., Ltd. that month. The former parent, SK enpulse, sold or spun off its other businesses and was merged into SKC on 22 December 2025. It no longer exists as a separate company. Enpulse Co., Ltd. is the only current entity that makes and sells the CMP pads tracked under the "SK enpulse" name.

What the company does. Enpulse designs, makes and sells CMP polishing pads for semiconductor wafer fabrication and does related R&D. The company lists its business scope as "CMP Pad manufacturing and sales, and research and development." It has no other product line. Before the carve-out, SK enpulse also ran blank masks, CMP slurry, testers and EFEM equipment. None of those businesses moved to Enpulse. The blank mask and slurry units were sold to other buyers, and the back-end equipment business went to ISC Co., Ltd.

Company self-description. The corporate website calls Enpulse a CMP Pad technology company that aims to become "Global No.1" in semiconductor CMP pads. It says it offers a "total solution" that integrates development, production, quality and safety, health and environment (SHE). It highlights a fully automated smart factory with real-time data, customer-specific pad design backed by integrated evaluation and analysis, and SHE-based management. The CEO message says Enpulse began developing CMP pads in 2015 in Korea, which then had no domestic CMP pad industry. It also says the company built the world's first fully automated CMP pad smart factory in Cheonan in 2020 and is building a Yongin research center for basic and product-development R&D. "Global No.1" is a stated ambition. On available market data, Enpulse is a mid-tier supplier by global revenue.

Business model and revenue model. Revenue comes entirely from product sales of a recurring, high-turnover fab consumable. Pads wear out and are replaced at regular intervals on each CMP platen, so demand tracks wafer starts and the number of CMP steps per wafer. The number of CMP steps rises with 3D NAND layer counts, DRAM and HBM complexity, and advanced logic interconnect layers. No service, subscription or licensing revenue has been disclosed. Pads are qualified process-of-record (POR) materials. Each design-in follows months to years of joint development and fab qualification for a specific layer, slurry and tool. Once a pad is qualified, switching costs are high and volumes are sticky. That makes qualification wins the main leading indicator of future revenue.

Value-chain position. Enpulse sits in the front-end fab-materials layer. Upstream, it buys isocyanates, polyols, curing agents, microspheres and sub-pad laminates. Its stated advantage is that it synthesizes its own prepolymers and additives rather than buying finished prepolymer. Downstream, it sells directly to integrated device manufacturers (memory and logic) and foundries running 200 mm and 300 mm lines. CMP tool makers and slurry suppliers are partners in co-optimization.

Customer types and end-markets. The customers are memory IDMs, logic and foundry fabs, and 200 mm specialty foundries. Korean press reports name SK hynix and DB HiTek as main supply relationships. Enpulse's corporate history gives anonymized qualification records with customers in Korea ("S", "D", "O"), China ("I", "S") and Taiwan ("M"). The English site claims more than 100 global clients but names none. The end-markets are DRAM and HBM, 3D NAND, foundry and logic, and mature-node analog and power devices on 200 mm.

Independent characterization. Enpulse is a focused, sub-scale challenger in a concentrated oligopoly. Qnity (formerly DuPont Electronics) and Entegris (which absorbed CMC Materials) lead the market. Hubei Dinglong is scaling fast inside China. Enpulse's advantages are proximity to Korean memory fabs, vertical integration into raw materials and a demonstrated record of qualifications. Its weaknesses are revenue concentration, scale (about 180,000 pads a year of installed capacity against Dinglong's roughly 600,000 target), and the change in ownership, which turned a captive SK-group supplier into an independent PE-owned company. The investment case rests on diversifying customers in China and Taiwan, moving the mix to advanced nodes, and margin recovery that began in 2024.

Stated strategy. The company's published vision and mission set out these themes:

1. Strengthen material-technology leadership centered on CMP pads.

2. Offer customer-tailored solutions and fast execution.

3. Build sustainable processes and a digital production system.

4. Support customer success with top-quality pad technology and improve semiconductor quality and productivity.

5. Ensure stable supply through safety and responsible management.

6. Anticipate future process needs through joint R&D.

The CEO message describes the long-term goal as becoming the global number-one company in semiconductor CMP pads.

Strategic initiatives in the last 24 months

Standalone carve-out: Timing: December 2024 to April 2025; Description and intent: Separation from SK enpulse and SKC into a dedicated pad company under Hahn & Company. Signing to closing took about three months

Yongin R&D center: Timing: 2025; Description and intent: Brings casting, CMP evaluation, material synthesis and analysis labs together in one site to shorten the path from research to mass production. Roadmap covers 2025–2027

International qualification push: Timing: 2025; Description and intent: 300 mm HD-319B qualified at Chinese customer "I" (April 2025) and Taiwanese customer "M" (May 2025). IS-320A qualified at Korean customer "S"

R&D roadmap 2025–2027: Timing: 2025–2027; Description and intent: Four tracks: Tailored Pads, High Removal (V-HT, V-RD), Low Defect (V-IS, V-ID) and Eco & Circular (V, E, B pads, reclaim and buffing reuse)

Eco product line: Timing: Ongoing; Description and intent: VDC-free, MOCA-free, dual-free and bio-based pads, supported by 30+ eco-related patents

Smart-factory operations: Timing: Ongoing; Description and intent: AI predictive maintenance, automatic feedback control, EAP lot isolation, automated FIFO, robotic lamination and packing

Portfolio synergies with SK Specialty: Timing: From May 2025; Description and intent: Shared leadership in 2025 and a shared customer base in Korean memory

Global partnerships: Timing: Ongoing; Description and intent: Joint research with global partners and growth of the IP portfolio. Partners are not named

Medium-term financial targets. Not publicly disclosed. Before the carve-out, SK enpulse targeted an enterprise value of KRW 1.5 trillion by 2025 when it renamed itself in January 2023. That target applied to the wider SK enpulse portfolio, which was later broken up, and does not carry over to Enpulse.

Enpulse sells CMP polishing pads in three families. The company does not publish detailed specifications. Numerical parameters such as hardness, compressibility, porosity and groove geometry are given on request or after a review of the customer's process. Pricing is not disclosed and is set per supply agreement.

Standard series: V-HD (including HD-300B, HD-319B, HD-500Q)

• Description: hard polyurethane pads with layer-specific templates and groove patterns matched to the target film and slurry.

• Applications: metal and dielectric planarization. The company says the line is proven in mass production on tungsten (W), copper (Cu) and polysilicon layers.

• Named products and qualification record:

  • HD-300B (8-inch / 200 mm): certified at Korean customer "D" (January 2016), Korean customer "O" (April 2023) and Chinese customer "S" (February 2024). It is the workhorse 200 mm product for specialty and mature-node fabs.

  • HD-319B (12-inch / 300 mm): certified at Korean customer "S" for W/Cu/Poly (August 2018), Chinese customer "I" (April 2025) and Taiwanese customer "M" (May 2025). It is the flagship 300 mm metal-layer pad and the main vehicle for the company's push outside Korea.

  • HD-500Q (12-inch): certified at Korean customer "S" for oxide STI/ILD (September 2020).

• Target customers: memory and logic fabs on 200 mm and 300 mm lines.

High Performance series: V-IS, V-HT, V-RD (including IS-320A)

• Description: pads designed for high-speed oxide and interlayer-dielectric (ILD) polishing, with rigid structures compatible with hard masks and an emphasis on reducing scratches and defects.

• V-HT and V-RD ("High Removal"): density and D.F (dielectric-film) control tuned to raise removal rate and fab throughput.

• V-IS and V-ID projects ("Low Defect"): softer polymers and optimized pore design to cut defects at advanced nodes.

• Named product: IS-320A (12-inch), certified at Korean customer "S" in 2025.

• Target customers: advanced DRAM, HBM, 3D NAND and logic fabs where defect density and removal-rate stability decide yield.

Eco & Future series: V, M, E, B

• V (Chlorine-free / VDC-free): pads made without vinylidene chloride (VDC)-based microsphere chemistry and with less chlorine.

• M (MOCA-free): pads cured without MOCA (4,4′-methylenebis(2-chloroaniline)), the conventional polyurethane curing agent, which is classified as a hazardous substance.

• E (Dual-Free): pads that are both VDC-free and MOCA-free.

• B (Bio-based): pads that include biomass-derived components, now at pilot stage. A Korean patent covering a biomass-containing polishing-pad composition was upheld in a 2025 cancellation proceeding.

• Reclaim and buffing-reuse pilot: reconditioning used pads for reuse.

• Target customers: fabs with Scope 3, chemical-substitution or green-procurement goals.

Enabling technologies (not sold separately)

• In-house raw-material design, from prepolymer synthesis to the finished pad.

• Hybrid pore system: solid microspheres plus inert-gas foaming to create multimodal pores with low contamination.

• Single-sheet casting with continuous feed, demolding and temperature plates to limit property variation between sheets.

• Joint design of groove pattern, bottom (sub-pad) stack and polymer blend for each customer recipe.

• Window technology for in-situ endpoint detection. Window patents make up 14% of the company's patent mix.

Services. Joint development, trial production and verification are part of the sale. Enpulse also provides on-request ESG certificates and test data. Revenue from services is not disclosed.