Understanding the Pain Point Driving Solid SiC Focus Ring Adoption
In advanced semiconductor plasma etching, focus rings sit at the boundary of the wafer tracking zone, shaping the electric field to keep etch profiles consistent from edge to center. Traditional quartz and silicon rings, however, suffer rapid erosion from halogen gas plasma in advanced nodes, causing frequent edge-to-center etch profile drift. This degradation forces more frequent ring replacement, disrupts production schedules, and undermines the consistency that advanced-node etching demands.
Zhejiang Liufang Semiconductor Technology Co., Ltd., operating under the corporate entity Wuyi Tianyao New Material Technology Co., Ltd. and known in the market under the brand VeTek Semiconductor (also referred to as Veteksemicon or VETEK), addresses this pain point directly through its Solid SiC Focus Ring / CVD SiC Focus Ring, positioned specifically as a focus ring for plasma etching equipment.
How the Binderless CVD SiC Matrix Solves Edge-to-Center Drift
The core differentiated value of this product lies in its binderless CVD SiC matrix, which contains no secondary phases at grain edges. This structural characteristic reduces particle shedding and allows the ring to withstand halogen plasma bombardment far more effectively than quartz or silicon alternatives, directly targeting the erosion mechanism responsible for edge-to-center etch profile drift.
Two core features support this etch life extension:
- Plasma Distribution: The ring surrounds the wafer tracking zone to achieve linear plasma distribution and exact edge-to-center etch profiles, the functional requirement that governs uniform etching across the wafer surface.
- High Chemical Resistance: The ring withstands fluorine and chlorine reactive ion etching, the two plasma chemistries most responsible for rapid degradation of conventional ring materials.
Manufacturing Approach: Bulk Solid SiC Machined to Tight Tolerances
Unlike coated components, the Solid SiC Focus Ring is delivered as a bulk Solid SiC component thicker than 5mm, machined to tight tolerances. This deployment model reflects the company's broader manufacturing philosophy of vertically integrated production, spanning prefabrication, hot pressing, purification, machining, and chemical vapor deposition, combined with dimensions capability exceeding 700mm. This vertical integration allows for rapid customization and significantly shortened production cycles compared to traditional processes, a capability directly relevant to focus rings, which are replaced on a recurring maintenance schedule and therefore benefit from faster turnaround.
On the machining side, equipment accuracy reaches up to 3μm, with maximum processing dimensions of 1200mm x 1500mm, precision levels that support the tight tolerances required for a component positioned directly within the plasma-exposed wafer tracking zone.
Material Purity as a Foundation for Consistent Performance
Because focus rings operate in direct contact with reactive plasma chemistries, material purity is closely tied to component lifespan and contamination control. The company's sintered and recrystallized SiC material achieves a purity level of SiC > 99.96%, with free Si content < 0.1%. For CVD SiC specifically, reported purity reaches 99.99995%, with impurity levels below 5ppm and harmful metals below 1ppm. Solid CVD SiC used across the product range carries a density of 3.2g/cm³, a growth rate of at least 0.15mm/h, and a resistivity range of 10^-2 to 10^4 Ω·cm, technical metrics that define the consistency of the base material from which components such as the Solid SiC Focus Ring are machined.
Platform Compatibility Across Etching Equipment
The Solid SiC Focus Ring is developed within a broader platform compatibility framework that supports systems and components compatible with international equipment platforms, including Applied Materials (AMAT), ASM, Tokyo Electron (TEL), LPE, Aixtron, NuFlare, Veeco, AMEC, Centrotherm, and PVA TePla. This compatibility reduces integration friction for fabs and equipment manufacturers already operating on these platforms.
Quality Systems Backing the Product Line
Production is certified under ISO 9001:2015 Quality Management System Certificate (Registration No. 0350224Q30161R0M), ISO 14001:2015 Environmental Management System Certificate (Registration No. 0350224E20326R0M), and ISO 45001:2018 Occupational Health and Safety Management System Certificate (Registration No. 0350224S30091R0M). Materials are also RoHS Compliant, REACH SVHC Screening Compliant, and Halogen-Free Certified, each verified through SGS testing, and the management system carries CNAS Management System Certification (CNAS C035-M). These certifications underpin the reliability expected of a component used in continuous, high-throughput etching operations.
Testing and validation for materials used in components like the Solid SiC Focus Ring rely on data infrastructure that includes Glow Discharge Mass Spectrometry (GDMS), Dynamic Secondary Ion Mass Spectrometry (D-SIMS), Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), X-ray Diffraction (XRD), scratch testers, and coordinate measuring machines (CMM).
Delivery Timelines and After-Sales Support
For custom precision items requiring CNC machining and CVD coating, delivery timelines range from 3 to 6 weeks, while bulk production orders are completed within 45 days and trial samples can be delivered within 30 days. Shipments can be accompanied by Certificates of Analysis (COA), Certificates of Conformance (COC), and Certificates of Origin (COO), and the company provides 24/7 online technical consulting to support thermal field optimization and component life extension, relevant for customers integrating focus rings into ongoing etch process tuning.
Market Feedback
Customers working with the company have described it as one that "offers high quality at a reasonable price, making them a valued business partner," and noted that "every step of the process was smooth. A reliable manufacturer indeed." Others highlighted that "the sales manager communicates clearly in English with strong professional knowledge" and praised the company's "attention to detail and commitment to quality," adding that they "received satisfactory goods in a short term."
Conclusion
For fabs and equipment manufacturers contending with edge-to-center etch profile drift caused by halogen plasma erosion, the Solid SiC Focus Ring offers a materials-based response: a binderless CVD SiC matrix free of secondary phases, machined from bulk Solid SiC thicker than 5mm to tight tolerances, and supported by a vertically integrated manufacturing platform, documented purity metrics, and a quality certification framework spanning ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018. Combined with platform compatibility across major etching equipment brands and established after-sales documentation practices, the product reflects the company's stated strategic positioning: providing advanced coating materials, high-purity silicon carbide components, and tailored thermal field systems for multiple semiconductor and photovoltaic application scenarios.
https://www.veteksemicon.com/
Wuyi Tianyao New Material Technology Co., LTD