PEEK ELS is an electrostatic dissipative (ESD-safe) grade of PEEK — polyether ether ketone — engineered for semiconductor fabrication, cleanroom handling, and vacuum environments where both material purity and controlled charge dissipation are required. Standard PEEK is an electrical insulator with volume resistivity above 10¹⁴ Ω·cm; PEEK ELS is modified to target a resistivity window of 10⁶ to 10¹⁰ Ω·cm, ensuring reliable static charge dissipation without creating a conductive path that could damage sensitive components.
PEEK ELS retains the core mechanical and thermal profile of unfilled PEEK: 14,500 psi tensile strength, Rockwell R120 hardness, continuous service temperature of 480°F (245°C), and a UL 94 V-0 flame rating at both 3 mm and 6 mm thickness. Dimensional stability is excellent, with low moisture absorption supporting the tight tolerances typical of wafer-handling fixtures, carrier trays, and precision semiconductor tooling.
Grade selection. PEEK ELS is the right choice when unfilled PEEK's insulating resistivity (>10¹⁴ Ω·cm) poses a static-charge risk in controlled environments. If you need full electrical conductivity for a structural wear component, select PEEK CF30 — 30% carbon-fiber reinforced (volume resistivity ~10⁴ Ω·cm). For reinforced structural parts without ESD requirements, PEEK GF30 retains full insulation. For wear-critical parts in standard environments, see PEEK PTFE or PEEK PVX.
Applications. PEEK ELS is used in wafer carriers, end effectors, process chamber components, pick-and-place fixtures, and vacuum-compatible insulators where particle generation must be minimized and electrostatic discharge must be controlled. The material machines with the same ease as standard PEEK — carbide tooling, moderate speeds, and dry or minimal-coolant cutting — making it practical for precision components in low-volume semiconductor and R&D applications. Contact Ready Plastics for stock dimensions and datasheet information.
