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Synchronized Electrostatic Discharge for Studying Electrostatic Discharge Susceptibility

IP.com Disclosure Number: IPCOM000060158D
Original Publication Date: 1986-Mar-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Engelbrecht, JC: AUTHOR

Abstract

Electrostatic discharge (ESD) - susceptible states of a product can be studied more productively than with randomly timed discharges with the arrangement shown in the figure. The ESD generator 10 is set into its single-shot mode and triggered during suspected susceptible states of the product. The susceptible states can be identified and individually studied and fixed. If the person operating the equipment can identify a susceptible state, the product designers can usually put in hardware modifications or software retries or something else to fix the problem at low cost. The benefits of synchronized ESD testing (compared to randomly timed discharging) are listed below. 1) If there is more than one ESD problem, work on each problem can be done independently.

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Synchronized Electrostatic Discharge for Studying Electrostatic Discharge Susceptibility

Electrostatic discharge (ESD) - susceptible states of a product can be studied more productively than with randomly timed discharges with the arrangement shown in the figure. The ESD generator 10 is set into its single-shot mode and triggered during suspected susceptible states of the product. The susceptible states can be identified and individually studied and fixed. If the person operating the equipment can identify a susceptible state, the product designers can usually put in hardware modifications or software retries or something else to fix the problem at low cost. The benefits of synchronized ESD testing (compared to randomly timed discharging) are listed below. 1) If there is more than one ESD problem, work on each problem can be done independently. 2) If the susceptible state occurs infrequently, the test can synchronize to it and speed up the fix work. For example, if the susceptibility is only for the sector recognition of a soft- sectored disk, this would be a susceptible state only about 0.05% of the time, but synchronized ESD could check the product on each revolution of the disk and reduce the required number of discharges from about 1000 to 1. 3) If the susceptible states are known, but have not been fixed, random ESD can be run during all but the susceptible states to see if all the susceptible states have been found. 4) This technique allows random ESD to ru...