|Sheets, Rods, Tubes|
|Beige, White, Black, Grey|
|Acetal, PPSU/PEI/PSU, PTFE|
Semitron: Anti Static Plastic Materials
The Semitron family of static dissipative plastics has been designed for applications where electrical discharge in operation is a problem.
Semitron plastics provide a controlled bleed-off of static charges. Their main properties include being permanently static dissipative, meaning Semitron prevents static charge generation on its surface.
There are four main grades of Semitron ESd, servicing static dissipative needs over a broad range of temperatures and mechanical loading conditions.
Semitron ESd 225 (POM) beige
Semitron ESd 225 is an acetal based static dissipative material ideal for material handling applications. It avoids discharge problems for parts intended for human contact. Semitron ESd 225 is also an excellent choice for fixturing used for handling in-process silicon wafers or used in the manufacturing of sensitive electronic components including hard disk drives and circuit boards.
Semitron ESd 410C (PEI) black
Having an excellent mechanical performance up to 210°C, Semitron ESd 410 provides ESd-solutions at higher temperatures. Additionally, ESd 410 exhibits excellent dimensional stability (low coefficient of linear thermal expansion and small water absorption), ideal for handling equipment in the electrical / electronic or semiconductor industries.
Semitron ESd 500HR (PTFE + mica) white
Reinforced with a proprietary synthetic mica, this material offers an excellent combination of low frictional properties, good dimensional stability and electrostatic dissipation. Whenever virgin PTFE causes electrical discharge problems, Semitron ESd 500HR will provide a controlled bleed-off of static charges while maintaining typical PTFE properties such as broad chemical resistance, temperature resistance and low coefficient of friction.
Semitron ESd 520HR (PAI) khaki grey
This new ESd material has an industry first combination of electrostatic dissipation (ESd), high strength and heat resistance. Ideal for making nests, sockets and contractors for test equipment and other device handling components in the semiconductor industry. The key feature of Semitron ESd 520HR is its unique ability to resist dielectric breakdown at high voltages (100V). Whereas e.g. typical carbon fiber enhanced products become irreversibly more conductive when exposed to even moderate voltages, Semitron ESd 520HR maintains its electrical performance throughout the voltage range 100 to 1000v, while offering the mechanical performance needed to excel in demanding applications.
- Permanently static dissipative
- Dissipate static charges (5 kV) in less than 2 seconds per Mil-B-81705C
- No metals or graphite / carbon powder used
Semitron Technical Notes
It is important to know how applied voltage affects the resistance of a material. Some materials exhibit high resistance at low voltages, but when subjected to harsher conditions, they can fall. This is due to dielectric breakdown and is irreversible. Since static electricity can be several thousand volts, consistent performance across the voltage range must be considered. Some materials are very inconsistent and vary on the "grain" of machining.
Wafer combs made of Semitron ESd 225 eliminate transfer equipment discharge problems that cause millions of dollars lost wafers every year. (Prior materials: Nylon, Standard Acetal).
Trays manufactured from Semitron ESd 410C dissipate static charges reliably and are dimensionally stable. (Prior materials: PPS, PEEK, Vespel PI).
Static dissipative inserts machined from Semitron ESd 500HR plate reduce damage to sensitive devices due to static discharge. (Prior materials: Ceramic).
IC Device Testing Fixtures
A test fixture manufacturer recently began using Semitron ESd 520HR that combines electrostatic dissipation (ESD) and high mechanical strength, to make integrated circuit test heads. The high mechanical strength of Semitron ESD 520HR results in longer useful life of the test heads and, thus, greater units (tested) per hour.
Semitron ESd 520HR is the first product to reliably meet all physical performance needs for test nests, sockets and contactors, combined with ESd performance. It is both ESd (surface resistivity of 1010 to 1012 ohms/square) and has sufficient resistance to minimise the risk of 'leakage' (cross-talk). Also significant is the ability of Semitron ESd 520HR to retain its surface resistivity at electrical forces greater than 100 volts.
|Rod thickness||Plate thickness||Tube O.D. thickness|
|Semitron ESd 225||4.76mm - 101.60mm||6.35mm - 50.80mm||N/A|
|Semitron ESd 410C||12.70mm - 247.65mm||9.53mm - 50.80mm||50.80mm - 374.65mm|
|Semitron ESd 500HR||N/A||6.35mm - 50.80mm||N/A|
|Semitron ESd 520HR||N/A||9.53mm - 38.10mm||N/A|
Phone 0191 258 0777 to buy
Phone 0191 258 0777 to buy
Phone 0191 258 0777 to buy
We carry an extensive range of stock to accommodate the diverse market for semi-finished plastic materials, offering custom sizes on all general plastics. Our professional cutting service will ensure quality finishes and rapid turnaround at all times.
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