Top 10 Companies in the Global Semiconductor-grade Capillary Underfills Market (2026): Market Leaders Powering Advanced Packaging

MARKET INSIGHTS

Global Semiconductor-grade Capillary Underfills market size was valued at USD 218.7 million in 2024. The market is projected to grow from USD 234.1 million in 2025 to USD 389.6 million by 2032, exhibiting a CAGR of 7.5% during the forecast period.

Semiconductor-grade capillary underfills are advanced epoxy-based composites used in flip‑chip packaging to enhance mechanical strength and thermal performance. These materials fill microscopic gaps between chips and substrates through capillary action, providing critical stress relief and protection against thermal cycling failures. The formulations typically include high‑purity silica fillers and specialized resins meeting stringent semiconductor manufacturing requirements.

The market growth is driven by increasing demand for advanced packaging in consumer electronics and automotive applications, particularly with the proliferation of 5G devices and electric vehicles. While the miniaturization trend in semiconductors creates opportunities, material manufacturers face challenges in developing formulations that balance flow characteristics with mechanical properties. Key players like Henkel and MacDermid Alpha are investing in low‑voiding formulations to address yield challenges in high‑density interconnects, with recent product launches focusing on sub‑10 µm gap filling capabilities.

Global Semiconductor-grade Capillary Underfills Market – View in Detailed Research Report

Top 10 Companies in the Global Semiconductor-grade Capillary Underfills Market

1️⃣ Henkel AG & Co. KGaA

Headquarters: Düsseldorf, Germany
Key Offering: Advanced epoxy‑based underfill formulations, low‑voiding solutions, sub‑10 µm gap fillers

Henkel is a global leader in specialty chemicals and materials science, with a dedicated portfolio for semiconductor packaging. The company’s R&D focuses on reducing viscosity while maintaining mechanical robustness, enabling high‑density interconnects in next‑generation nodes.

Sustainability & Growth Initiatives:

• Investment in bio‑based resin research to reduce VOC emissions.
• Partnerships with semiconductor fabs to develop lead‑free, low‑temperature curing underfills.
• Expansion of production capacity in Asia‑Pacific to support EV and 5G chip manufacturing.

2️⃣ CAPLINQ Corporation

Headquarters: Hong Kong
Key Offering: High‑performance underfill materials for flip‑chip and chip‑on‑film applications

CAPLINQ specializes in low‑voiding, high‑thermal conductivity underfills, targeting automotive and aerospace sectors with stringent reliability requirements.

Sustainability & Growth Initiatives:

• Development of halogen‑free formulations compliant with REACH and RoHS.
• Collaboration with Tier‑1 automotive suppliers for joint R&D.
• Scaling of manufacturing in Singapore and Taiwan.

3️⃣ MacDermid Alpha Electronics Solutions

Headquarters: Pittsburgh, United States
Key Offering: Ultra‑low‑temperature curing underfills, nano‑filled composites

MacDermid Alpha focuses on high‑reliability packaging for aerospace, defense, and high‑performance computing.

Sustainability & Growth Initiatives:

• Zero‑VOC certification for flagship underfill lines.
• Strategic alliance with semiconductor fabs for next‑generation 3D IC packaging.
• Investment in AI‑driven process optimization tools.

4️⃣ NAMICS Corporation

Headquarters: Osaka, Japan
Key Offering: Thermally conductive underfills, silicon‑filled formulations

NAMICS provides high‑thermal‑conductivity underfills for high‑power RF and automotive power modules.

Sustainability & Growth Initiatives:

• Development of recyclable filler materials.
• Partnerships with Japanese automotive OEMs for EV battery electronics.
• Expansion of R&D facilities in Southeast Asia.

5️⃣ Indium Corporation

Headquarters: San Jose, United States
Key Offering: Lead‑free, high‑temperature resistant underfills

Indium focuses on underfills for high‑temperature automotive and industrial applications.

Sustainability & Growth Initiatives:

• Implementation of closed‑loop recycling of epoxy resins.
• Collaboration with semiconductor foundries for low‑energy curing processes.
• Investment in green chemistry research.

6️⃣ Dow Inc.

Headquarters: Midland, United States
Key Offering: High‑performance, low‑viscosity underfills

Dow delivers underfills with exceptional mechanical strength for high‑density interconnects.

Sustainability & Growth Initiatives:

• Development of bio‑based epoxy resins.
• Partnerships with semiconductor fabs for sustainable packaging solutions.
• Expansion of production capacity in Europe and Asia.

7️⃣ Shin‑Etsu Chemical Co., Ltd.

Headquarters: Tokyo, Japan
Key Offering: Nano‑filled underfills, high‑thermal conductivity solutions

Shin‑Etsu focuses on advanced underfill technologies for high‑speed, high‑frequency RF and automotive electronics.

Sustainability & Growth Initiatives:

• Investment in low‑VOC formulation development.
• Collaboration with semiconductor manufacturers for 5G chip packaging.
• Expansion of eco‑friendly manufacturing lines in Japan and China.

8️⃣ Heraeus Epurio

Headquarters: Hamburg, Germany
Key Offering: Thermally conductive, low‑viscosity underfills

Heraeus Epurio provides underfills with excellent thermal performance for automotive and industrial applications.

Sustainability & Growth Initiatives:

• Development of recycled silica filler blends.
• Partnerships with automotive Tier‑1 suppliers for EV electronics.
• Implementation of energy‑efficient curing processes.

9️⃣ Hitachi Chemical Co., Ltd.

Headquarters: Tokyo, Japan
Key Offering: High‑temperature resistant underfills, lead‑free solutions

Hitachi Chemical focuses on underfills for high‑temperature automotive power modules and industrial electronics.

Sustainability & Growth Initiatives:

• Adoption of green chemistry principles in resin synthesis.
• Collaboration with semiconductor fabs for low‑energy curing.
• Expansion of R&D in Southeast Asia.

🔟 AI Technology, Inc.

Headquarters: Austin, United States
Key Offering: AI‑driven process optimization for underfill dispensing, low‑voiding formulations

AI Technology leverages machine learning to improve dispensing accuracy and reduce defects in high‑volume production.

Sustainability & Growth Initiatives:

• Development of AI tools for predictive maintenance of dispensing equipment.
• Partnerships with semiconductor OEMs for automated packaging lines.
• Investment in renewable energy for manufacturing facilities.

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Market Outlook

With the semiconductor industry projected to grow at a CAGR of approximately 8% through 2032, the demand for advanced packaging materials, including capillary underfills, is set to accelerate. The rise of 5G, AI, and IoT applications, coupled with the electrification of automotive platforms, will drive volume and innovation. Regulatory pushes for reduced hazardous substances and sustainability will shape future product development, encouraging the adoption of bio‑based and low‑VOC formulations.

Future Trends

Key future trends include the development of ultra‑low‑temperature curing underfills compatible with heat‑sensitive components, integration of AI in dispensing and quality control, and the expansion of green chemistry initiatives to meet global environmental standards. Emerging markets in Asia‑Pacific and Latin America will also present growth opportunities as local semiconductor fabs ramp up production of advanced chips. The convergence of advanced packaging with photonics and quantum computing will open niche segments for specialized underfill materials with ultra‑low shrinkage and high thermal conductivity.