Читать книгу The ESD Control Program Handbook - Jeremy M. Smallwood - Страница 65

Any object that is at a different voltage from an ESDS device can be a source of ESD if the object can touch the device or come close enough for a discharge to jump a small air gap between them. The ESD that occurs may be more or less damaging or problematic according to its characteristics. Different ESD sources produce waveforms with very different characteristics in terms of parameters such as peak current, duration, energy and charge transferred to the device, and frequency spectrum. Even an apparently similar source can give widely different ESD waveforms under different circumstances. Some examples of real ESD waveforms are given next – these may or may not be representative of ESD produced from similar sources in other real situations, which may be highly variable.