English
Ngôn ngữ
This PEEK based static dissipative material provides a dissipative range of 106 - 109 ohms/sq. Semitron® ESd 480 is very dimensionally stable, making it ideal for critical test fixture applications. Its exceptional chemical resistance makes it well suited for use in wafer handling and other structural applications in wet process tools where static dissipation is important. Like all Quadrant Semitron® ESd materials, Semitron ESd480 is not subject to dielectric breakdown.
Very dimensionally stable
Exceptional chemical resistance
Not subject to dielectric breakdown
Critical Test Fixtures, Wafer Handling, Test Sockets for IC Chips
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. This chart illustrates the effect of sequential applications of 100 through 1,000 volts, then a return to 100 volts to determine the hysteresis. 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. One pair of lines illustrate the typical variation from side to side (A to B) of the same sample. This example demonstrates the need for consistent behavior in service.