Electrostatic Dissipative (ESD) Ceramics By CIM

Technology & Process Introduction

Electrostatic discharge (ESD) control is critical in industries such as semiconductor manufacturing, microelectronics, and precision assembly, where even minor static charges can cause severe damage to sensitive components. Conventional ESD solutions are largely polymer-based composites, which suffer from limitations in mechanical strength, thermal stability, and chemical resistance.

To overcome these challenges, DYT has developed a patented zirconia- and alumina-based ESD ceramic material system, engineered specifically for high-performance and precision applications.

Unlike traditional ESD materials that rely on conductive fillers (e.g., carbon or metal particles), this advanced ceramic technology achieves controlled electrical conductivity through intrinsic material engineering:

• Base materials:
  • Partially stabilized zirconia (PSZ)
  • High-purity alumina
• Functional dopants (2–25 wt%):
  • Metal oxides such as iron oxide (Fe₂O₃), chromium oxide (Cr₂O₃), and titanium oxide (TiO₂)

During controlled sintering and heat treatment, these dopants interact with the ceramic matrix to create oxygen-deficient, non-stoichiometric structures, resulting in n-type semiconductive behavior without forming a separate conductive phase.

Ceramic Injection Molding (CIM) Process Flow

The material is optimized for ceramic injection molding (CIM), enabling high-volume production of complex geometries:

• Powder Preparation - Homogeneous mixing of ceramic powders and dopants via attrition milling
• Feedstock Compounding - Blending with a proprietary binder system (HDPE, EVA, waxes, surfactants) under heat and vacuum
• Injection Molding - Near-net shaping of intricate and micro-scale components
• Debinding & Sintering
• Sintering - At ~1300-1600°C in air, vacuum, or reducing atmosphere
• Optional Post Heat-Treatment - To improve ESD properties
• Final Properties Development - Controlled microstructure yields stable electrical resistivity and superior mechanical integrity

Key Advantages

1. Intrinsic ESD Performance (No Conductive Fillers)
   • Uniform electrical properties without phase segregation or hot spots
   • Surface resistivity typically in the range of 10⁶–10¹¹ Ω/sq
   • Fast static decay (<1 second)
2. Superior Mechanical Properties
   • High hardness and wear resistance (typical of zirconia/alumina ceramics)
   • Excellent stiffness and dimensional stability
   • Suitable for precision and micro-scale components
3. High Thermal Stability
   • Stable ESD performance from 25°C to 500°C
   • Significant advantage over polymer-based ESD materials
4. Chemical Inertness & Cleanliness
   • Resistant to corrosion, chemicals, and contamination
   • Ideal for cleanroom and semiconductor environments
5. Complex Geometry Capability (via CIM)
   • Net-shape manufacturing of intricate designs
   • Reduced or eliminated machining
   • High repeatability for mass production
6. Cost-Effective & Scalable
   • Simplified composition (single dopant possible)
   • Compatible with established CIM infrastructure
   • Reduced secondary processing

Industry Applications

This ESD ceramic technology is particularly suited for high-precision, high-reliability environments:

Semiconductor & Electronics Manufacturing

• Wire bonding capillaries
• ESD-safe tweezers and handling tools
• Dispensing needles and micro-fluidic components

Precision Assembly & Automation

• Pick-and-place nozzles
• Alignment and adjustment tools
• Static-sensitive component handling systems

Advanced Manufacturing & Equipment

• ESD-safe cutting tools (e.g., scissors, blades)
• Wear-resistant tooling in cleanroom environments

Emerging Applications

• Micro-electromechanical systems (MEMS)
• Optical and photonics assembly
• Medical device manufacturing (where ESD + cleanliness is critical)

Conclusion

DYT’s patented zirconia-based ESD ceramics represent a significant advancement over conventional polymer-based ESD materials. By combining intrinsic conductivity, ceramic durability, and CIM manufacturing capability, this technology enables the production of high-performance, reliable, and complex ESD components for next-generation industries.

Contact us today to inquire about our services.