Summary

The global market for Silicon Ring was estimated to be worth US$ 810 million in 2024 and is forecast to a readjusted size of US$ 1251 million by 2031 with a CAGR of 6.9% during the forecast period 2025-2031.
This report provides a comprehensive assessment of recent tariff adjustments and international strategic countermeasures on Silicon Ring cross-border industrial footprints, capital allocation patterns, regional economic interdependencies, and supply chain reconfigurations.
The silicon ring is used in the dry etching machine as the focus ring, outer electrode, confinement ring. Silicon rings for etching are mainly used on 8-12 inches (i.e., 200mm-300mm) plasma etcher. In the manufacturing process of integrated circuits, high-purity silicon components and wafers are made of silicon, which makes the electrical properties of etching more uniform, so silicon rings are widely used in semiconductor etchers. The periodic consumption of silicon ring products has become an important consumable component in the wafer processing process, which directly affects the electrical properties of the wafer. For example, a silicon ring needs to be replaced after processing about 200 wafers. The market demand for silicon rings is mainly driven by the wafer processing capacity of chip factories.
Currently the silicon ring is mainly produced in the United States, South Korea, Japan and China. The key players of silicon ring include Silfex Inc., Hana Materials Inc., Worldex Industry & Trading, Mitsubishi Materials, CoorsTek, SiFusion, KC Parts Tech., Ltd., RS Technologies Co., Ltd., Techno Quartz Inc., DS Techno, etc.
According to Semiconductor Industry Association (SIA), global semiconductor chip sales hit $627.6 billion in 2024, an increase of 19.1% compared to the 2023 total of $526.8 billion. The global semiconductor market experienced its highest-ever sales year in 2024, topping $600 billion in annual sales for the first time, and double-digit market growth is projected for 2025. Semiconductors enable virtually all modern technologies – including medical devices, communications, defense applications, AI, advanced transportation, and countless others – and the long-term industry outlook is incredibly strong. Regionally, yearly sales were up in the Americas (44.8%), China (18.3%), and Asia Pacific/All Others (12.5%), but down in Japan (-0.4%), and Europe (-8.1%).
The development of silicon ring is closely intertwined with the overall trends in semiconductor. As Moore's Law continues to evolve, the precision and efficiency requirements for chip manufacturing have been consistently escalating, driving continuous advancements in semiconductor equipment technology. This technological progress subsequently enables sustained improvements in chip performance and cost reductions, meeting the growing demand for chip products in the digital economy era. In recent years, despite intensified global trade fluctuations, emerging market demands from artificial intelligence, new energy vehicles, and low-altitude economy sectors have maintained strong global demand for wafer fabrication plant construction. It is anticipated that in the coming years, the global semiconductor equipment industry will continue to experience rapid development, which will further propel the advancement of silicon ring.
This report aims to provide a comprehensive presentation of the global market for Silicon Ring, focusing on the total sales volume, sales revenue, price, key companies market share and ranking, together with an analysis of Silicon Ring by region & country, by Diameter, and by Application.
The Silicon Ring market size, estimations, and forecasts are provided in terms of sales volume (K Pcs) and sales revenue ($ millions), considering 2024 as the base year, with history and forecast data for the period from 2020 to 2031. With both quantitative and qualitative analysis, to help readers develop business/growth strategies, assess the market competitive situation, analyze their position in the current marketplace, and make informed business decisions regarding Silicon Ring.
Market Segmentation
By Company
Silfex Inc.
Hana Materials Inc.
Worldex Industry & Trading Co., Ltd.
Mitsubishi Materials
CoorsTek
SiFusion
KC Parts Tech., Ltd.
RS Technologies Co., Ltd.
ThinkonSemi (Fujian Dynafine)
Techno Quartz Inc.
Chongqing Genori Technology Co., Ltd
Ruijiexinsheng Electronic Technology (WuXi) Co., Ltd
One Semicon Co.,Ltd
CMTX Co.,Ltd
BC&C
K-max
Alchemist
DS Techno
Ronda Semiconductor
SICREAT(Suzhou) Semitech Co.,Ltd.
Beijing YESEMi
Wuxi Naskai Semiconductor Technology
Yangzhou Lattice Semiconductor
Chongqing Xinhui Material Technology
Segment by Diameter
12 Inch Silicon Ring
8 Inch Silicon Ring
Others
Segment by Application
OEM
Wafer FAB
By Region
North America
United States
Canada
Asia-Pacific
China
Japan
South Korea
Southeast Asia
India
Australia
Rest of Asia-Pacific
Europe
Germany
France
U.K.
Italy
Netherlands
Nordic Countries
Rest of Europe
Latin America
Mexico
Brazil
Rest of Latin America
Middle East & Africa
Turkey
Saudi Arabia
UAE
Rest of MEA
Chapter Outline
Chapter 1: Introduces the report scope of the report, global total market size (value, volume and price). This chapter also provides the market dynamics, latest developments of the market, the driving factors and restrictive factors of the market, the challenges and risks faced by manufacturers in the industry, and the analysis of relevant policies in the industry.
Chapter 2: Detailed analysis of Silicon Ring manufacturers competitive landscape, price, sales and revenue market share, latest development plan, merger, and acquisition information, etc.
Chapter 3: Provides the analysis of various market segments by Diameter, covering the market size and development potential of each market segment, to help readers find the blue ocean market in different market segments.
Chapter 4: Provides the analysis of various market segments by Application, covering the market size and development potential of each market segment, to help readers find the blue ocean market in different downstream markets.
Chapter 5: Sales, revenue of Silicon Ring in regional level. It provides a quantitative analysis of the market size and development potential of each region and introduces the market development, future development prospects, market space, and market size of each country in the world.
Chapter 6: Sales, revenue of Silicon Ring in country level. It provides sigmate data by Diameter, and by Application for each country/region.
Chapter 7: Provides profiles of key players, introducing the basic situation of the main companies in the market in detail, including product sales, revenue, price, gross margin, product introduction, recent development, etc.
Chapter 8: Analysis of industrial chain, including the upstream and downstream of the industry.
Chapter 9: Conclusion.

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Table of Contents

1 Market Overview
1.1 Silicon Ring Product Introduction
1.2 Global Silicon Ring Market Size Forecast
1.2.1 Global Silicon Ring Sales Value (2020-2031)
1.2.2 Global Silicon Ring Sales Volume (2020-2031)
1.2.3 Global Silicon Ring Sales Price (2020-2031)
1.3 Silicon Ring Market Trends & Drivers
1.3.1 Silicon Ring Industry Trends
1.3.2 Silicon Ring Market Drivers & Opportunity
1.3.3 Silicon Ring Market Challenges
1.3.4 Silicon Ring Market Restraints
1.4 Assumptions and Limitations
1.5 Study Objectives
1.6 Years Considered
2 Competitive Analysis by Company
2.1 Global Silicon Ring Players Revenue Ranking (2024)
2.2 Global Silicon Ring Revenue by Company (2020-2025)
2.3 Global Silicon Ring Players Sales Volume Ranking (2024)
2.4 Global Silicon Ring Sales Volume by Company Players (2020-2025)
2.5 Global Silicon Ring Average Price by Company (2020-2025)
2.6 Key Manufacturers Silicon Ring Manufacturing Base and Headquarters
2.7 Key Manufacturers Silicon Ring Product Offered
2.8 Key Manufacturers Time to Begin Mass Production of Silicon Ring
2.9 Silicon Ring Market Competitive Analysis
2.9.1 Silicon Ring Market Concentration Rate (2020-2025)
2.9.2 Global 5 and 10 Largest Manufacturers by Silicon Ring Revenue in 2024
2.9.3 Global Top Manufacturers by Company Type (Tier 1, Tier 2, and Tier 3) & (based on the Revenue in Silicon Ring as of 2024)
2.10 Mergers & Acquisitions, Expansion
3 Segmentation by Diameter
3.1 Introduction by Diameter
3.1.1 11 Inch Silicon Ring
3.1.2 13 Inch Silicon Ring
3.1.3 Others
3.2 Global Silicon Ring Sales Value by Diameter
3.2.1 Global Silicon Ring Sales Value by Diameter (2020 VS 2024 VS 2031)
3.2.2 Global Silicon Ring Sales Value, by Diameter (2020-2031)
3.2.3 Global Silicon Ring Sales Value, by Diameter (%) (2020-2031)
3.3 Global Silicon Ring Sales Volume by Diameter
3.3.1 Global Silicon Ring Sales Volume by Diameter (2020 VS 2024 VS 2031)
3.3.2 Global Silicon Ring Sales Volume, by Diameter (2020-2031)
3.3.3 Global Silicon Ring Sales Volume, by Diameter (%) (2020-2031)
3.4 Global Silicon Ring Average Price by Diameter (2020-2031)
4 Segmentation by Application
4.1 Introduction by Application
4.1.1 OEM
4.1.2 Wafer FAB
4.2 Global Silicon Ring Sales Value by Application
4.2.1 Global Silicon Ring Sales Value by Application (2020 VS 2024 VS 2031)
4.2.2 Global Silicon Ring Sales Value, by Application (2020-2031)
4.2.3 Global Silicon Ring Sales Value, by Application (%) (2020-2031)
4.3 Global Silicon Ring Sales Volume by Application
4.3.1 Global Silicon Ring Sales Volume by Application (2020 VS 2024 VS 2031)
4.3.2 Global Silicon Ring Sales Volume, by Application (2020-2031)
4.3.3 Global Silicon Ring Sales Volume, by Application (%) (2020-2031)
4.4 Global Silicon Ring Average Price by Application (2020-2031)
5 Segmentation by Region
5.1 Global Silicon Ring Sales Value by Region
5.1.1 Global Silicon Ring Sales Value by Region: 2020 VS 2024 VS 2031
5.1.2 Global Silicon Ring Sales Value by Region (2020-2025)
5.1.3 Global Silicon Ring Sales Value by Region (2026-2031)
5.1.4 Global Silicon Ring Sales Value by Region (%), (2020-2031)
5.2 Global Silicon Ring Sales Volume by Region
5.2.1 Global Silicon Ring Sales Volume by Region: 2020 VS 2024 VS 2031
5.2.2 Global Silicon Ring Sales Volume by Region (2020-2025)
5.2.3 Global Silicon Ring Sales Volume by Region (2026-2031)
5.2.4 Global Silicon Ring Sales Volume by Region (%), (2020-2031)
5.3 Global Silicon Ring Average Price by Region (2020-2031)
5.4 North America
5.4.1 North America Silicon Ring Sales Value, 2020-2031
5.4.2 North America Silicon Ring Sales Value by Country (%), 2024 VS 2031
5.5 Europe
5.5.1 Europe Silicon Ring Sales Value, 2020-2031
5.5.2 Europe Silicon Ring Sales Value by Country (%), 2024 VS 2031
5.6 Asia Pacific
5.6.1 Asia Pacific Silicon Ring Sales Value, 2020-2031
5.6.2 Asia Pacific Silicon Ring Sales Value by Region (%), 2024 VS 2031
5.7 South America
5.7.1 South America Silicon Ring Sales Value, 2020-2031
5.7.2 South America Silicon Ring Sales Value by Country (%), 2024 VS 2031
5.8 Middle East & Africa
5.8.1 Middle East & Africa Silicon Ring Sales Value, 2020-2031
5.8.2 Middle East & Africa Silicon Ring Sales Value by Country (%), 2024 VS 2031
6 Segmentation by Key Countries/Regions
6.1 Key Countries/Regions Silicon Ring Sales Value Growth Trends, 2020 VS 2024 VS 2031
6.2 Key Countries/Regions Silicon Ring Sales Value and Sales Volume
6.2.1 Key Countries/Regions Silicon Ring Sales Value, 2020-2031
6.2.2 Key Countries/Regions Silicon Ring Sales Volume, 2020-2031
6.3 United States
6.3.1 United States Silicon Ring Sales Value, 2020-2031
6.3.2 United States Silicon Ring Sales Value by Diameter (%), 2024 VS 2031
6.3.3 United States Silicon Ring Sales Value by Application, 2024 VS 2031
6.4 Europe
6.4.1 Europe Silicon Ring Sales Value, 2020-2031
6.4.2 Europe Silicon Ring Sales Value by Diameter (%), 2024 VS 2031
6.4.3 Europe Silicon Ring Sales Value by Application, 2024 VS 2031
6.5 China
6.5.1 China Silicon Ring Sales Value, 2020-2031
6.5.2 China Silicon Ring Sales Value by Diameter (%), 2024 VS 2031
6.5.3 China Silicon Ring Sales Value by Application, 2024 VS 2031
6.6 Japan
6.6.1 Japan Silicon Ring Sales Value, 2020-2031
6.6.2 Japan Silicon Ring Sales Value by Diameter (%), 2024 VS 2031
6.6.3 Japan Silicon Ring Sales Value by Application, 2024 VS 2031
6.7 South Korea
6.7.1 South Korea Silicon Ring Sales Value, 2020-2031
6.7.2 South Korea Silicon Ring Sales Value by Diameter (%), 2024 VS 2031
6.7.3 South Korea Silicon Ring Sales Value by Application, 2024 VS 2031
6.8 Southeast Asia
6.8.1 Southeast Asia Silicon Ring Sales Value, 2020-2031
6.8.2 Southeast Asia Silicon Ring Sales Value by Diameter (%), 2024 VS 2031
6.8.3 Southeast Asia Silicon Ring Sales Value by Application, 2024 VS 2031
6.9 India
6.9.1 India Silicon Ring Sales Value, 2020-2031
6.9.2 India Silicon Ring Sales Value by Diameter (%), 2024 VS 2031
6.9.3 India Silicon Ring Sales Value by Application, 2024 VS 2031
7 Company Profiles
7.1 Silfex Inc.
7.1.1 Silfex Inc. Company Information
7.1.2 Silfex Inc. Introduction and Business Overview
7.1.3 Silfex Inc. Silicon Ring Sales, Revenue, Price and Gross Margin (2020-2025)
7.1.4 Silfex Inc. Silicon Ring Product Offerings
7.1.5 Silfex Inc. Recent Development
7.2 Hana Materials Inc.
7.2.1 Hana Materials Inc. Company Information
7.2.2 Hana Materials Inc. Introduction and Business Overview
7.2.3 Hana Materials Inc. Silicon Ring Sales, Revenue, Price and Gross Margin (2020-2025)
7.2.4 Hana Materials Inc. Silicon Ring Product Offerings
7.2.5 Hana Materials Inc. Recent Development
7.3 Worldex Industry & Trading Co., Ltd.
7.3.1 Worldex Industry & Trading Co., Ltd. Company Information
7.3.2 Worldex Industry & Trading Co., Ltd. Introduction and Business Overview
7.3.3 Worldex Industry & Trading Co., Ltd. Silicon Ring Sales, Revenue, Price and Gross Margin (2020-2025)
7.3.4 Worldex Industry & Trading Co., Ltd. Silicon Ring Product Offerings
7.3.5 Worldex Industry & Trading Co., Ltd. Recent Development
7.4 Mitsubishi Materials
7.4.1 Mitsubishi Materials Company Information
7.4.2 Mitsubishi Materials Introduction and Business Overview
7.4.3 Mitsubishi Materials Silicon Ring Sales, Revenue, Price and Gross Margin (2020-2025)
7.4.4 Mitsubishi Materials Silicon Ring Product Offerings
7.4.5 Mitsubishi Materials Recent Development
7.5 CoorsTek
7.5.1 CoorsTek Company Information
7.5.2 CoorsTek Introduction and Business Overview
7.5.3 CoorsTek Silicon Ring Sales, Revenue, Price and Gross Margin (2020-2025)
7.5.4 CoorsTek Silicon Ring Product Offerings
7.5.5 CoorsTek Recent Development
7.6 SiFusion
7.6.1 SiFusion Company Information
7.6.2 SiFusion Introduction and Business Overview
7.6.3 SiFusion Silicon Ring Sales, Revenue, Price and Gross Margin (2020-2025)
7.6.4 SiFusion Silicon Ring Product Offerings
7.6.5 SiFusion Recent Development
7.7 KC Parts Tech., Ltd.
7.7.1 KC Parts Tech., Ltd. Company Information
7.7.2 KC Parts Tech., Ltd. Introduction and Business Overview
7.7.3 KC Parts Tech., Ltd. Silicon Ring Sales, Revenue, Price and Gross Margin (2020-2025)
7.7.4 KC Parts Tech., Ltd. Silicon Ring Product Offerings
7.7.5 KC Parts Tech., Ltd. Recent Development
7.8 RS Technologies Co., Ltd.
7.8.1 RS Technologies Co., Ltd. Company Information
7.8.2 RS Technologies Co., Ltd. Introduction and Business Overview
7.8.3 RS Technologies Co., Ltd. Silicon Ring Sales, Revenue, Price and Gross Margin (2020-2025)
7.8.4 RS Technologies Co., Ltd. Silicon Ring Product Offerings
7.8.5 RS Technologies Co., Ltd. Recent Development
7.9 ThinkonSemi (Fujian Dynafine)
7.9.1 ThinkonSemi (Fujian Dynafine) Company Information
7.9.2 ThinkonSemi (Fujian Dynafine) Introduction and Business Overview
7.9.3 ThinkonSemi (Fujian Dynafine) Silicon Ring Sales, Revenue, Price and Gross Margin (2020-2025)
7.9.4 ThinkonSemi (Fujian Dynafine) Silicon Ring Product Offerings
7.9.5 ThinkonSemi (Fujian Dynafine) Recent Development
7.10 Techno Quartz Inc.
7.10.1 Techno Quartz Inc. Company Information
7.10.2 Techno Quartz Inc. Introduction and Business Overview
7.10.3 Techno Quartz Inc. Silicon Ring Sales, Revenue, Price and Gross Margin (2020-2025)
7.10.4 Techno Quartz Inc. Silicon Ring Product Offerings
7.10.5 Techno Quartz Inc. Recent Development
7.11 Chongqing Genori Technology Co., Ltd
7.11.1 Chongqing Genori Technology Co., Ltd Company Information
7.11.2 Chongqing Genori Technology Co., Ltd Introduction and Business Overview
7.11.3 Chongqing Genori Technology Co., Ltd Silicon Ring Sales, Revenue, Price and Gross Margin (2020-2025)
7.11.4 Chongqing Genori Technology Co., Ltd Silicon Ring Product Offerings
7.11.5 Chongqing Genori Technology Co., Ltd Recent Development
7.12 Ruijiexinsheng Electronic Technology (WuXi) Co., Ltd
7.12.1 Ruijiexinsheng Electronic Technology (WuXi) Co., Ltd Company Information
7.12.2 Ruijiexinsheng Electronic Technology (WuXi) Co., Ltd Introduction and Business Overview
7.12.3 Ruijiexinsheng Electronic Technology (WuXi) Co., Ltd Silicon Ring Sales, Revenue, Price and Gross Margin (2020-2025)
7.12.4 Ruijiexinsheng Electronic Technology (WuXi) Co., Ltd Silicon Ring Product Offerings
7.12.5 Ruijiexinsheng Electronic Technology (WuXi) Co., Ltd Recent Development
7.13 One Semicon Co.,Ltd
7.13.1 One Semicon Co.,Ltd Company Information
7.13.2 One Semicon Co.,Ltd Introduction and Business Overview
7.13.3 One Semicon Co.,Ltd Silicon Ring Sales, Revenue, Price and Gross Margin (2020-2025)
7.13.4 One Semicon Co.,Ltd Silicon Ring Product Offerings
7.13.5 One Semicon Co.,Ltd Recent Development
7.14 CMTX Co.,Ltd
7.14.1 CMTX Co.,Ltd Company Information
7.14.2 CMTX Co.,Ltd Introduction and Business Overview
7.14.3 CMTX Co.,Ltd Silicon Ring Sales, Revenue, Price and Gross Margin (2020-2025)
7.14.4 CMTX Co.,Ltd Silicon Ring Product Offerings
7.14.5 CMTX Co.,Ltd Recent Development
7.15 BC&C
7.15.1 BC&C Company Information
7.15.2 BC&C Introduction and Business Overview
7.15.3 BC&C Silicon Ring Sales, Revenue, Price and Gross Margin (2020-2025)
7.15.4 BC&C Silicon Ring Product Offerings
7.15.5 BC&C Recent Development
7.16 K-max
7.16.1 K-max Company Information
7.16.2 K-max Introduction and Business Overview
7.16.3 K-max Silicon Ring Sales, Revenue, Price and Gross Margin (2020-2025)
7.16.4 K-max Silicon Ring Product Offerings
7.16.5 K-max Recent Development
7.17 Alchemist
7.17.1 Alchemist Company Information
7.17.2 Alchemist Introduction and Business Overview
7.17.3 Alchemist Silicon Ring Sales, Revenue, Price and Gross Margin (2020-2025)
7.17.4 Alchemist Silicon Ring Product Offerings
7.17.5 Alchemist Recent Development
7.18 DS Techno
7.18.1 DS Techno Company Information
7.18.2 DS Techno Introduction and Business Overview
7.18.3 DS Techno Silicon Ring Sales, Revenue, Price and Gross Margin (2020-2025)
7.18.4 DS Techno Silicon Ring Product Offerings
7.18.5 DS Techno Recent Development
7.19 Ronda Semiconductor
7.19.1 Ronda Semiconductor Company Information
7.19.2 Ronda Semiconductor Introduction and Business Overview
7.19.3 Ronda Semiconductor Silicon Ring Sales, Revenue, Price and Gross Margin (2020-2025)
7.19.4 Ronda Semiconductor Silicon Ring Product Offerings
7.19.5 Ronda Semiconductor Recent Development
7.20 SICREAT(Suzhou) Semitech Co.,Ltd.
7.20.1 SICREAT(Suzhou) Semitech Co.,Ltd. Company Information
7.20.2 SICREAT(Suzhou) Semitech Co.,Ltd. Introduction and Business Overview
7.20.3 SICREAT(Suzhou) Semitech Co.,Ltd. Silicon Ring Sales, Revenue, Price and Gross Margin (2020-2025)
7.20.4 SICREAT(Suzhou) Semitech Co.,Ltd. Silicon Ring Product Offerings
7.20.5 SICREAT(Suzhou) Semitech Co.,Ltd. Recent Development
7.21 Beijing YESEMi
7.21.1 Beijing YESEMi Company Information
7.21.2 Beijing YESEMi Introduction and Business Overview
7.21.3 Beijing YESEMi Silicon Ring Sales, Revenue, Price and Gross Margin (2020-2025)
7.21.4 Beijing YESEMi Silicon Ring Product Offerings
7.21.5 Beijing YESEMi Recent Development
7.22 Wuxi Naskai Semiconductor Technology
7.22.1 Wuxi Naskai Semiconductor Technology Company Information
7.22.2 Wuxi Naskai Semiconductor Technology Introduction and Business Overview
7.22.3 Wuxi Naskai Semiconductor Technology Silicon Ring Sales, Revenue, Price and Gross Margin (2020-2025)
7.22.4 Wuxi Naskai Semiconductor Technology Silicon Ring Product Offerings
7.22.5 Wuxi Naskai Semiconductor Technology Recent Development
7.23 Yangzhou Lattice Semiconductor
7.23.1 Yangzhou Lattice Semiconductor Company Information
7.23.2 Yangzhou Lattice Semiconductor Introduction and Business Overview
7.23.3 Yangzhou Lattice Semiconductor Silicon Ring Sales, Revenue, Price and Gross Margin (2020-2025)
7.23.4 Yangzhou Lattice Semiconductor Silicon Ring Product Offerings
7.23.5 Yangzhou Lattice Semiconductor Recent Development
7.24 Chongqing Xinhui Material Technology
7.24.1 Chongqing Xinhui Material Technology Company Information
7.24.2 Chongqing Xinhui Material Technology Introduction and Business Overview
7.24.3 Chongqing Xinhui Material Technology Silicon Ring Sales, Revenue, Price and Gross Margin (2020-2025)
7.24.4 Chongqing Xinhui Material Technology Silicon Ring Product Offerings
7.24.5 Chongqing Xinhui Material Technology Recent Development
8 Industry Chain Analysis
8.1 Silicon Ring Industrial Chain
8.2 Silicon Ring Upstream Analysis
8.2.1 Key Raw Materials
8.2.2 Raw Materials Key Suppliers
8.2.3 Manufacturing Cost Structure
8.3 Midstream Analysis
8.4 Downstream Analysis (Customers Analysis)
8.5 Sales Model and Sales Channels
8.5.1 Silicon Ring Sales Model
8.5.2 Sales Channel
8.5.3 Silicon Ring Distributors
9 Research Findings and Conclusion
10 Appendix
10.1 Research Methodology
10.1.1 Methodology/Research Approach
10.1.1.1 Research Programs/Design
10.1.1.2 Market Size Estimation
10.1.1.3 Market Breakdown and Data Triangulation
10.1.2 Data Source
10.1.2.1 Secondary Sources
10.1.2.2 Primary Sources
10.2 Author Details
10.3 Disclaimer