Storing Data: To write data, a high voltage (around 15-20V) is applied to the control gate above the floating gate. This causes electrons from the transistor’s channel (the substrate) to “tunnel” through the thin oxide barrier via a quantum mechanical process called Fowler-Nordheim tunneling. The electrons get trapped in the floating gate, creating a negative charge. The presence and amount of this charge shift the cell’s threshold voltage—the voltage needed to turn the transistor on during a read operation.
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We have a dedicated buying guide that digs deeper into the key aspects to consider when buying a mechanical gaming keyboard, so we encourage you to look at that for a full rundown. To keep things high-level, the most influential part of your purchase is your keyboard’s switch type. These little mechanisms slot underneath the keycaps and generally have the biggest effect on how your keyboard feels and sounds as you type away.