Toward Standardization of Low Impedance Contact CDM

The 16.6 ohm implementation of contact CDM (LICCDM) recently published in ANSI-ESD Standard Practice 5.3.3 is shown to produce waveforms of similar shape, Ifail, and Ipeak vs. Ceff dependency as JS-002. The non-monotonicity of JS-002 at low voltages is overcome using LICCDM. A path to joint standardization with air discharge testing is proposed.

Caster Contact: The Achilles Heel of ESD Floors

A fully functional ESD floor prevents static generation and provides an effective path to ground for personnel and equipment. Many conductive and dissipative floors meet STM 7.1 resistance parameters in ANSI/ESD S20.20 but fail to provide adequate electrical contact for grounding equipment with conductive casters and drag chains.

Will 4% Steps Find Radiated Susceptibilities?

CISPR Publications 24 and 35 allow radiated and conducted immunity tests to be performed using I% or 4% steps. This article looks at measured radiated immunity test data to determine the typical shapes of radiated susceptibilities for multimedia equipment. The authors consider what those shapes tell us about the validity of the 4% step method.

Accelerated Aging with Mixed Flowing Gases

How do you know how your product will perform in the future? With accelerated aging, you can learn how mixing different types of gases in a chamber can simulate the effects of atmospheric pollutants. In fact, you identify how your product is likely to perform many years into the future—and you can do it over the course of several days using the Mixed Flowing Gas Corrosion test.

Trust but Verify

It’s imperative for successful completion of a testing project that as a compliance engineer or technician leading a product certification effort, you trust but verify the work of testing facilities.

Requirements of Antennas for EMC Testing

Antennas used for EMC testing possess several characteristics which make them ideal for use in a fast-paced, production-like EMC test environment. This article will briefly describe what these characteristics are, starting with the most important parameter – antenna factor.

RF Power Amplifiers for Conducted RF Immunity Testing

If you’re performing commercial conducted radiated immunity tests strictly by the book, you will want to utilize a radio-frequency (RF) signal generator and power amplifier combination that fully complies with IEC 61000-4-6.

Two Pin HBM Testing: A New Option?

Human Body Model (HBM) is the original ESD test method for semiconductor devices and is still the most widely used ESD test . This article will discuss the old, but now new Two Pin HBM Tester. Not only are the ... Read More...

Device Failure from the Initial Current Step of a CDM Discharge

CDM discharges exhibit a fast initial current step when the stray capacitance of the pogo pin is charged. It is demonstrated that the high slew rate can damage sensitive gate oxides. The miscorrelation of CDM and CC-TLP methodologies is addressed by applying pulses with 20 ps rise time.