Bernstein ESD workstations & ESD hand tools brochure Page 5
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Tel. +49 (0) 2191 - 9650 - 0 ELECTRONICS ESD FOLLOWS ELECTROSTATIC UNLOADING OF COMPONENTS Date of damage detection value efforts component level 1x part costs production stop part costs assembled circuit board ELECTROSTATIC DISCHARGE IN EVERYDAY LIFE 10x production stop error search repair costs The most visible form of electrostatic discharge is lightning during a storm, when clouds with different potentials abruptly discharge. All of us have at one point experienced a sudden discharge, such as after walking across a carpeted floor and then touching the handle of a door. part costs production stop finished, tested product 100x error search repair costs inspection costs delivery delays Replacement/repair costs delivered product 1000x Field service / delivery costs compensation loss of reputation CAR DOOR DOOR LINK GREETING COMPONENT SENSITIVITY The ESD sensitivity of electronic components is rising as component parts are increasingly miniaturised. Moreover, ever smaller components offer less and less space for protective circuits on microchips. In order to save energy, components need to get by on less power. A discharge of just 50 volts is enough to cause damage to a blue LED, for example. SMDs are already at risk of damage at voltages higher than 100 V. In contrast to this, the human ability to perceive ESD is very limited. Discharges are first noticeable from 3500 volts, audible from 4500 volts and visible from 10000 volts. DETECTING AND ELIMINATING FAULTS Components damaged by ESD cannot normally be seen with the naked eye. Even tiny discharges can lead to complete failure. These direct failures can usually be identified during quality control. So-called latent failures are especially critical, as they only become apparent when products are in operation. The time and effort needed to eliminate these intrinsic failures cause the greatest costs. ESD damage generally concerns latent damage. It is therefore absolutely essential that the appropriate precautions are taken. LATENTER ERROR (intrinsic error) DIRECT ERROR 26% ESD damage no error 19% FAILURE CAUSE ELECTRONICAL COMPONENTS not analyzed 3% user error 32% manufacturing error 20%
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