Overview
PEEK insulators are high-performance electrical insulating components manufactured from polyether ether ketone (PEEK), a premium engineering thermoplastic renowned for its exceptional combination of dielectric properties, mechanical strength, thermal stability, and chemical resistance. These precision insulators are critical components in semiconductor manufacturing equipment, electrical devices, and high-temperature applications where reliable electrical insulation must be maintained under demanding mechanical and thermal conditions. OrroMFG produces precision PEEK insulators using advanced CNC machining and injection molding techniques, delivering high-purity, dimensionally accurate insulating components for the most demanding electrical and semiconductor applications.
PEEK insulators offer significant advantages over traditional insulating materials such as ceramics, glass, and other polymers. Unlike ceramics, PEEK is lightweight, impact-resistant, and easily machined into complex geometries. Compared to other engineering plastics, PEEK provides significantly higher temperature resistance, mechanical strength, and dimensional stability while maintaining excellent dielectric properties. Our PEEK insulator product line includes standoff insulators, spacer insulators, wafer handling end effectors, socket insulators, coil bobbins, and custom-designed insulating components for specific applications. We use only high-purity, unfilled PEEK resin for insulating applications to ensure maximum dielectric strength and minimal outgassing. All PEEK insulators are precision machined to tight tolerances with superior surface finishes, ensuring precise fit and consistent electrical performance in critical applications.
Key Features
- Excellent Dielectric Properties: High dielectric strength, low dielectric constant, and excellent insulation resistance for reliable electrical isolation.
- High Temperature Resistance: Continuous operating temperature up to 260°C (500°F), maintaining insulating properties at temperatures where most polymers fail.
- Exceptional Mechanical Strength: High tensile strength, flexural modulus, and impact resistance for structural insulating applications under load.
- Low Outgassing: Very low volatile organic compound (VOC) emission, suitable for vacuum and cleanroom applications.
- Chemical and Plasma Resistance: Resistant to most chemicals, cleaning agents, and plasma processes encountered in semiconductor manufacturing.
- Dimensional Stability: Low moisture absorption and excellent creep resistance maintain precise dimensions across varying environmental conditions.
Material Specifications
| Property | Unfilled PEEK (Natural) | High-Purity PEEK |
|---|---|---|
| Density (g/cm³) | 1.30 - 1.32 | 1.30 - 1.32 |
| Tensile Strength (MPa) | 90 - 100 | 95 - 105 |
| Tensile Modulus (GPa) | 3.6 - 4.0 | 3.7 - 4.1 |
| Flexural Strength (MPa) | 150 - 170 | 155 - 175 |
| Flexural Modulus (GPa) | 3.6 - 4.0 | 3.7 - 4.1 |
| HDT at 1.8 MPa (°C) | 150 - 160 | 155 - 165 |
| Continuous Service Temp (°C) | 260 | 260 |
| Dielectric Strength (kV/mm, 1mm) | 19 - 23 | 20 - 24 |
| Dielectric Constant (1MHz) | 3.1 - 3.3 | 3.0 - 3.2 |
| Dissipation Factor (1MHz) | 0.002 - 0.003 | 0.0015 - 0.0025 |
| Volume Resistivity (Ω·cm) | 10¹⁶ - 10¹⁷ | 10¹⁶ - 10¹⁷ |
| Surface Resistivity (Ω/sq) | 10¹⁵ - 10¹⁶ | 10¹⁵ - 10¹⁶ |
| Comparative Tracking Index (CTI) | ≥ 600V | ≥ 600V |
| Water Absorption (24h, %) | 0.1 - 0.2 | 0.05 - 0.15 |
| Outgassing (TML, %) | < 0.5 | < 0.2 |
Applications
Semiconductor Manufacturing
PEEK insulators are essential components in semiconductor wafer processing equipment including plasma etchers, deposition systems (CVD, PVD), ion implanters, and wafer handling robots. They serve as electrical insulators for electrostatic chucks (ESC), gas distribution plates, wafer lift pins, chamber components, and high-voltage feedthroughs. PEEK’s combination of excellent dielectric properties, high-purity, plasma resistance, and low particle generation makes it ideal for semiconductor front-end processing. Its ability to withstand vacuum conditions and thermal cycling also makes it suitable for use in vacuum processing chambers.
Electrical and Electronics Industry
In electrical and electronic equipment, PEEK insulators are used in high-voltage connectors, switchgear, relay components, coil bobbins, transformer bobbins, and sensor housings. Their ability to maintain reliable electrical insulation at elevated temperatures makes them suitable for power electronics, motor components, and high-voltage applications where traditional plastics like nylon or PBT would degrade. PEEK insulators are also used in high-frequency applications due to their stable dielectric properties over a wide frequency range.
Medical Devices
In medical equipment and devices, PEEK insulators are used in surgical instruments, electrosurgical tools, diagnostic equipment, and implantable devices (when appropriately certified). Medical-grade PEEK provides biocompatibility, sterilization resistance (autoclave, gamma, EtO), and excellent dielectric properties for medical electrical applications. It is commonly used in surgical handpieces, ablation catheters, and patient monitoring equipment where electrical insulation and biocompatibility are both essential.
Aerospace and Aviation
In aerospace applications, PEEK insulators serve in aircraft electrical systems, sensor components, antenna insulators, and connector components. Their lightweight nature contributes to fuel efficiency and weight reduction, while their high temperature resistance and excellent mechanical properties ensure reliable performance in demanding aerospace environments. PEEK’s low outgassing properties also make it suitable for space applications.
Industrial Equipment
In industrial equipment, PEEK insulators are used in heating elements, welding equipment, high-temperature sensors, and chemical processing equipment where electrical insulation must be maintained at high temperatures and in corrosive environments. They are also used in test and measurement equipment where high precision and stable dielectric properties are required.
Operating Conditions
- Temperature Range: -40°C to +260°C (-40°F to +500°F) continuous service; short-term exposure up to 300°C
- Dielectric Strength: 19-24 kV/mm for 1mm thickness; sufficient for most medium-voltage insulating applications
- Voltage Rating: Up to 10 kV depending on thickness, geometry, and environmental conditions
- Frequency Range: Stable dielectric properties from DC through high-frequency (GHz) range
- Chemical Compatibility: Resistant to most acids, bases, solvents, hydrocarbons, and cleaning agents; excellent resistance to steam and CIP/SIP chemicals
- Vacuum Compatibility: Suitable for high-vacuum and ultra-high-vacuum (UHV) applications with low outgassing (high-purity grades)
- Sterilization Compatibility: Autoclave (134°C), gamma irradiation, ethylene oxide (EtO), and dry heat sterilization
- Flammability: UL94 V-0 rating for most PEEK grades; low smoke and toxic gas emission
Material Comparison
| Material | Dielectric Strength | Temp Range | Mechanical Strength | Chemical Resistance | Cost | Best For |
|---|---|---|---|---|---|---|
| PEEK (unfilled) | Excellent (19-23 kV/mm) | -40 to +260°C | Very High | Very Good | Very High | High-temp, structural, semiconductor apps |
| Alumina Ceramic | Outstanding (20-30 kV/mm) | Up to 1500°C | High | Excellent | High | Very high-temp, high-voltage, extreme wear |
| PTFE | Excellent (19-23 kV/mm) | -200 to +260°C | Low | Excellent | Medium | Low-load, chemical service, RF/microwave |
| Nylon PA66 | Good (15-20 kV/mm) | -40 to +120°C | Medium-High | Fair | Low-Medium | General electrical, moderate temp, low cost |
| PBT | Good (17-22 kV/mm) | -40 to +140°C | Medium | Good | Low-Medium | Electrical connectors, automotive electronics |
| Phenolic | Good (10-15 kV/mm) | -40 to +130°C | Medium | Fair | Low | Low-voltage, general purpose, low cost |
Choose PEEK insulators when:
- High temperature resistance (>150°C) combined with good dielectric properties is needed
- Structural strength and mechanical integrity are required alongside electrical insulation
- The application involves semiconductor manufacturing or vacuum processing
- Chemical resistance and dimensional stability are critical
- Low outgassing and high purity are essential for cleanroom/vacuum service
- Medical-grade biocompatibility and sterilization resistance are required
Customization Options
- Material Grades: Unfilled natural PEEK, high-purity PEEK, medical-grade PEEK (PEEK-OPTIMA), low-outgassing aerospace grade, ESD/conductive PEEK (for grounding applications)
- Insulator Types: Stand-off insulators, spacer insulators, pin insulators, wafer handling end effectors, socket insulators, coil bobbins, feedthrough insulators, and custom geometries
- Size Range: Miniature insulators from 1mm to large structural insulators up to 500mm; custom sizes available
- Tolerance Grades: Precision machined to IT4-IT7 dimensional tolerances for critical applications
- Surface Finishes: As-machined, polished, tumble-deburred, and vapor-polished surfaces; Ra down to 0.4 μm
- Threaded Features: Internal/external threads, tapped holes, and threaded inserts for mounting
- Metal Inlays: Bonded metal contacts, inserts, and electrodes for hybrid insulating/conductive components
- Cleanroom Packaging: Class 100/1000 cleanroom manufacturing and packaging for semiconductor applications
- Color Options: Natural amber (standard for insulating grade), and custom colors on request
- Testing Services: Dielectric strength testing, insulation resistance measurement, hi-pot testing, and outgassing testing
Quality Assurance
OrroMFG is committed to delivering PEEK insulators of the highest quality and reliability. Our ISO 9001:2015 certified manufacturing facilities employ strict quality control protocols throughout the entire production process, from raw material receipt through final inspection and packaging. We maintain dedicated cleanroom production areas for semiconductor and medical-grade components, with strict contamination control protocols.
We source only premium unfilled PEEK resin from globally recognized manufacturers with full material certification and traceability. Incoming material verification includes FTIR spectroscopy for polymer identification, DSC thermal analysis for melt temperature and crystallinity, and dielectric property testing. Manufacturing processes including CNC machining, injection molding, and finishing are carefully controlled and monitored. Quality control inspections include comprehensive dimensional verification using coordinate measuring machines (CMM) and optical comparators, surface roughness measurement, and visual inspection for defects. Electrical testing includes dielectric strength (hi-pot) testing, insulation resistance measurement, and dielectric constant verification for critical components. We also perform material testing including tensile strength, flexural strength, and outgassing testing (per ASTM E595) for vacuum and aerospace applications. Semiconductor-grade products are manufactured and packaged in cleanroom environments with particle counting and contamination control. All PEEK insulators are supplied with detailed material certificates, electrical test reports, inspection reports, and full batch traceability documentation. Our commitment to quality ensures that every PEEK insulator delivers reliable electrical insulation performance and mechanical integrity in the most demanding applications.
