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The Purity That Drives Semiconductor Performance

We supply ultra-high purity alumina engineered to maximize yield and minimize risk in critical processes, from Chemical Mechanical Planarization (CMP) and coatings to packaging and ceramic components. In every application, our purity, consistency, and traceability ensure the reliable performance customers count on.

The Challenge: High Stakes, Zero Tolerance

Semiconductor processes run under extreme conditions demanding absolute precision. Plasma chambers, slurry systems, and deposition rely on ceramics that stay ultra-clean, stable, and reliable. As nodes shrink and complexity rises, sensitivity to impurities increases, while a single particle defect can cut CPU value by up to 70%. That’s why our customers treat high-purity alumina as mission-critical.

How We Help: POLARGuard™ Purity that Protects Performance

POLARGuard™ is our ultra-high purity alumina, co-developed with leading semiconductor manufacturers for their mission-critical applications. Available in 4N and 5N grades, it meets the industry’s most demanding standards for ultra-low impurities, consistent performance, and qualification ease. Every batch is rigorously tested, fully traceable, and engineered to deliver reliability at scale.

POLARGuard™ is produced through our proprietary process, with industry-leading efficiency and a significantly reduced environmental footprint.

The result: a stable, sustainable supply of high-purity alumina that safeguards wafer quality, maximizes uptime, and supports long-term process performance.

The PUREGuard™ line within the POLARGuard™ portfolio is built specifically for semiconductor manufacturing, where purity, particle control, and application-specific performance are non-negotiable. It supports plasma etch, ALD, CMP, and backend packaging steps with 5N-grade alumina engineered to minimize contamination, ensure surface uniformity, and maximize process reliability across every stage of the fab.

What We Deliver: Higher Yield, Fewer Defects, and Trusted Purity

From CMP to ceramic parts for etch and deposition tools, our alumina powders protect performance where it matters most.

Coatings

With unmatched purity, chemical resistance, thermal stability, and ultra-smooth finish, UHPA prevents contamination and ensures high-yield, reliable manufacturing.

Coatings

Backend packaging

Improves thermal management, insulation, and integrity, driving greater reliability and performance in compact, power-dense wafers.

Backend packaging

Polishing

Enables precise, stable, and contamination-free polishing of wafers, ensuring flatness, yield, and guaranteed performance.

Polishing

Ceramics

Provides stability and insulation for high-performance, contamination-free components 44 like insulators, spacers, and other high-strength components.

Ceramics

Why Semiconductor Engineers Choose Polar

At Polar, we collaborate directly with ceramic manufacturers, toolmakers, and foundries in high- spec semiconductor environments. Our alumina experts understand the growing performance demands across critical applications and use that insight to engineer, produce, and qualify ultra- high purity alumina (UHPA) our customers can trust—today and tomorrow.

Purity for Performance

We offer 4N and 5N options with lowest contamination and tight particle variation.

Proven in Semiconductor Production

Our alumina is used in CMP, etch, and deposition systems around the world.

Fully Traceable

Every order comes with extended test data, methods, and traceability records tailored to your needs.

PUREGuard™: Performance That Extends Throughout The Value Chain

From toolmakers to fabs, PUREGuard high-purity alumina delivers the reliability, cleanliness, and durability demanded across semiconductor applications. Our materials support longer component life, reduced defectivity, and greater process stability throughout the value chain.

Ceramic part makers Ceramic part makers

We supply alumina to manufacturers producing components for semiconductor tools. Our tight particle size control and submicron purity support clean sintering and reliable ceramic performance.

Semiconductor equipment Semiconductor equipment

PUREGuard™ is used in semiconductor equipment that require stable ceramic components. Consistent properties help components last longer and run cleaner.

Foundries Foundries

Foundries rely on ceramics made with our alumina to reduce contamination, minimize particle generation, and maintain yield across advanced nodes.

End users End users

End users value our traceability, North American sourcing, and responsive quality assurance. We help reduce qualification time and support second-source strategies.

Frequently asked questions

A: High-purity alumina, typically at least 99.99% pure, offers superior electrical insulation and thermal conductivity compared to traditional alumina. The reduced impurity levels minimize defects and grain boundaries, enhancing performance for semiconductor applications. Read more. 

A: We offer high-purity alumina powders at both 4N (99.99%) and 5N (99.999%) levels, tested and validated in-house. Each batch undergoes rigorous documentation to ensure it meets the traceability and consistency requirements of advanced ceramic and semiconductor processes.

A: Yes. We offer both standard and customized particle size distributions. Just share your target specs and we’ll tailor accordingly.

A: Absolutely. We provide spec sheets, SEM images, PSD charts, and elemental analysis summaries upon request to support validation and qualification efforts.

A: Yes. We offer custom high-purity alumina samples tailored to your process requirements, including optional spec input fields like particle size or elemental constraints. Samples are processed quickly with full documentation for validation.

A: Every batch is tested in-house using validated methods for purity, particle size, and surface area. Our lab team uses calibrated equipment and centralized data systems to maintain traceability and reduce variability.

 A: We include quality assurance reports, traceability records, and elemental breakdowns with every shipment. These documents support audits, internal validation, and second-source qualification programs.

A: Yes. Our high-purity alumina supports ceramic part manufacturers and OEM toolmakers producing semiconductor components across the supply chain, from etch liner components to CMP systems. We align with the specs and expectations of major fabs and their suppliers.

A: Yes, advancements in production methods have led to more sustainable high-purity alumina manufacturing processes. For instance, certain techniques have achieved significant reductions in emissions, making high-purity alumina production more environmentally friendly. Learn more.