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News

New highly stable static dissipative products maintain ESd properties after repeated electrical exposure

Quadrant EPP : 10 June, 2006  (New Product)
To meet increasing requirements for dimensional stability and static dissipation in semiconductor test fixtures, Quadrant Engineering Plastic Products has introduced two new Semitron ESd grades. The products are the company's latest entries in its family of static dissipative stock shapes for machining.
Semitron ESd 420V is based on PEI (Polyetherimide). Its proprietary reinforcement technology provides higher strength and stiffness and improves upon the overall stability of the company's current PEI based ESd product. Additionally, the new material offers surface resistivity of 10^6 to 10^9 ohms/square. With heat deflection temperature of 420F, the material provides a more cost effective, high strength alternative to ultra high temperature resistant materials.

For applications where higher temperature resistance is required, the company has developed a new reinforced polyetheretherketone, designated Semitron ESd 480. Like its PEI counterpart, It has surface resistivity of 106 to 109 W/square, but with a heat deflection temperature of 480F. Also, its chemical resistance characteristic of PEEK based products make it suitable for wafer handling and other structural applications in wet process tools that require static dissipation.

'A major advantage of Semitron ESd 420V and 480 is their ability to maintain their i-electric performance even after repeated exposures to high voltages, according to Dr. Richard W. Campbell, Quadrant's director of product development. 'In contrast, other typical carbon-fiber-enhanced products become irreversibly more conductive when exposed to moderate voltage, and thus cannot ensure continued ESD protection to the wafer or device' he added. Campbell also noted that Quadrant's proprietary carbon fiber reinforcement technology is also non-sloughing, and thus minimizes contamination. 'This makes it ideal for machined nests, sockets and contactors for test equipment and other electronic device handling and testing components.'

In introducing the materials, Fred Sanford, Business Manager for Quadrant EPP's semicon products said, 'Static electricity is a scourge for semiconductor process and test engineers. Ideally, what they want is a material with the strength and stiffness of steel, without its electrical conductivity. Our new Semitron ESd 420V and 480 offer the optimum combination of these characteristics, and provide cost effective choices based on the range of temperature requirements.'

Both new grades from Quadrant offer high structural integrity, stiffness and dimensional stability over a wide temperature range, with their combination of low moisture absorption and low coefficient of thermal expansion.

Quadrant EPP offers a number of static dissipative products, covering a broad range of electrical resistivities, mechanical properties and thermal resistance. Other static dissipative products offered by Quadrant EPP are:

Semitron ESd 225, with surface resistivity of 109 to 1010 W/sq. and a heat deflection temperature of 225F
Semitron ESd 410C offering surface resistivity of 102 to 106 W/sq. and a heat deflection temperature of 410F
Semitron ESd 420 with surface resistivity of 106 to 109 W/sq., low moisture absorption and a heat deflection temperature of 420F
Semitron ESd 420V, a high strength grade with surface resistivity of 106 to 109 W/sq. , high dimensional stability and a heat deflection temperature of 420F
Semitron ESd 500HR featuring surface resistivity of 1010 to 1012 W/sq and a continuous service temperature of 500F
Semitron ESd 520HR with surface resistivity of 1010 to 1012 W/sq and a continuous service temperature of 520F
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