Our primary ceramic material is alumina-based ruby, a type of ceramic known for its hardness, second only to diamond.

●Micro-Ceramics Parts Manufacturing Using Ceramic Raw Material and Precision Grinding Techniques with advanced ceramic raw material and grinding techniques, we manufacture micro-ceramics parts as small as less than 1 mm.

◆Features
• Single-Crystal Quality in Polycrystalline Ceramics
　Using in-house manufacturing, we process externally sourced single-crystal materials and integrate them with our proprietary polycrystalline raw materials in a one-stop process.

• Near-Net Shape Precision and Reproducibility
Components are molded close to final shape, reducing manufacturing steps and materials while achieving a surface roughness of 0.05Ra or below.

• High Insulation, Wear Resistance, and Chemical Stability
Made from high-precision ruby materials, these parts provide excellent insulation, wear resistance, and chemical stability.

◆Characteristics
• Vickers Hardness of Alumina
　Our alumina material has Vickers hardness equivalent to synthetic ruby, offering excellent wear resistance.

• Compressive Strength
　Synthetic ruby has high compressive strength and shows exceptional mechanical properties.

• Polished Surface and Transparency
　The polished surface is highly transparent, offering advantages such as scratch resistance and easy detection of particle accumulation.


◆Applications
• Watch Parts
• Jewelry Components
• Measuring Instrument Parts
• Medical Components

Our products are flexible and versatile, delivering high performance and reliability across various applications.

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*For inquiries, please contact
Ms. Kobayashi
Email: kobayashinon@citizen.co.jp
company : Citizen Fine Device Co., Ltd.
location : Miyota, Nagano Prefecture

For inquiries through the contact form on our website, please kindly include "Inquiry from Emidas" in the additional notes.