Articles

Grounding operators that handle ESD susceptible devices is one of the requirements for an ESD Control Plan. In fact, it is the basis of the ESD Association’s ANSI/ESD S20.20-2014 Standard. Grounding the body and maintaining maximum resistance to ground (Rtg) of less than 35 megohms prevents the operator from generating more than 100 volts.  The…

Read more ESD Control and High Voltage – Is it safe to ground our personnel working with or around high voltage?

The ESD Association‘s Resistance-to-Ground (Rtg) requirement for an operator wearing a wrist strap is < 3.5 X 107 ohms (ANSI/ESD S20.20). A wireless wrist strap will never meet this requirement. Wireless wrist straps claim to work by “making (a) body’s static electricity to discharge through discharge box.” Assuming that an operator was tribocharged to 10…

Read more Reminder: Wireless Wrist Straps Still Don’t Work

Desco made our first crude version of a wrist strap for an aerospace customer in Southern California. The wrist strap was basically a metal watchband connected to a wire with a ring terminal on it. There were no industry accepted standards, qualification procedures, or certification processes at that time. ESD susceptible components used in electronics…

Read more State-of-the-Art ESD Control

Posted by Carl Newberg, Ted Dangelmayer and Terry Welsher Current, not voltage, causes ESD damage to electronic devices, circuit boards and assemblies Common items used in electrostatic discharge (ESD) protected work areas (EPA) are plastic totes, trays and boxes. In most cases, these are viewed as commodity items with very little thought or engineering put…

Read more Are Your ESD Tote Boxes and Containers Too Conductive?

Think Of Static Electricity as Germs and Contamination! Daily life has other examples of hidden enemies where careful procedures must be followed to regularly obtain positive results. One example is sterilization, which combats germs and contamination in hospitals. Damage caused by invisible and undetectable events can be understood by comparing ESD damage to medical contamination of the human…

Read more Operator’s Part in ESD Control

At this point in our blog series concerning ESD Awareness, we should  consider some basic physics: Ohm’s law is an extremely useful equation in the field of electrical/electronic engineering because it describes how voltage, current, and resistance are interrelated. Ohm’s law states that, in an electrical circuit, the current passing through a conductor between two…

Read more What is OHM’s Law?

There are three ESD Awareness Symbols defined in ANSI/ESD S8.1: ESD Susceptibility Symbol ESD Protective Symbol ESD Common Point Ground To view information about each symbol please click the link or image above. Desco provides downloadable symbol artwork at no charge: ESD Susceptibility Symbol ESD Protective Symbol ESD Common Point Ground Desco utilizes the proper […]