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<p>A <b>single-event upset</b> (<b>SEU</b>), also known as a <b>single-event error</b> (<b>SEE</b>), is a change of state caused by one single ionizing particle (e.g. ions, electrons, photons) striking a sensitive node in a live micro-electronic device, such as in a <a href="page.php?w=microprocessor">microprocessor</a>, <a href="page.php?w=semiconductor_memory">semiconductor memory</a>, or power <a href="page.php?w=transistors">transistors</a>. The state change is a result of the free charge created by <a href="page.php?w=ionization">ionization</a></p><p>
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