Qué (quién) es Digital Semiconductor - definición
![Operation of a [[MOSFET]] and its Id-Vg curve. At first, when no gate voltage is applied. There is no inversion electron in the channel, the device is OFF. As gate voltage increase, the inversion electron density in the channel increase, the current increases, and the device turns on.](https://commons.wikimedia.org/wiki/Special:FilePath/Threshold formation nowatermark.gif?width=200 "Operation of a [[MOSFET]] and its Id-Vg curve. At first, when no gate voltage is applied. There is no inversion electron in the channel, the device is OFF. As gate voltage increase, the inversion electron density in the channel increase, the current increases, and the device turns on.")
![[[John Bardeen]], [[William Shockley]] and [[Walter Brattain]] developed the bipolar [[point-contact transistor]] in 1947.](https://commons.wikimedia.org/wiki/Special:FilePath/Bardeen Shockley Brattain 1948.JPG?width=200 "[[John Bardeen]], [[William Shockley]] and [[Walter Brattain]] developed the bipolar [[point-contact transistor]] in 1947.")
![[[Karl Ferdinand Braun]] developed the [[crystal detector]], the first [[semiconductor device]], in 1874.](https://commons.wikimedia.org/wiki/Special:FilePath/Ferdinand Braun.jpg?width=200 "[[Karl Ferdinand Braun]] developed the [[crystal detector]], the first [[semiconductor device]], in 1874.")
![ingot]] of [[monocrystalline silicon]]](https://commons.wikimedia.org/wiki/Special:FilePath/Monokristalines Silizium für die Waferherstellung.jpg?width=200 "ingot]] of [[monocrystalline silicon]]")
![[[Silicon]] crystals are the most common semiconducting materials used in [[microelectronics]] and [[photovoltaics]].](https://commons.wikimedia.org/wiki/Special:FilePath/Silicon.jpg?width=200 "[[Silicon]] crystals are the most common semiconducting materials used in [[microelectronics]] and [[photovoltaics]].")
Wikipedia
Semiconductor memory is a digital electronic semiconductor device used for digital data storage, such as computer memory. It typically refers to devices in which data is stored within metal–oxide–semiconductor (MOS) memory cells on a silicon integrated circuit memory chip. There are numerous different types using different semiconductor technologies. The two main types of random-access memory (RAM) are static RAM (SRAM), which uses several transistors per memory cell, and dynamic RAM (DRAM), which uses a transistor and a MOS capacitor per cell. Non-volatile memory (such as EPROM, EEPROM and flash memory) uses floating-gate memory cells, which consist of a single floating-gate transistor per cell.
Most types of semiconductor memory have the property of random access, which means that it takes the same amount of time to access any memory location, so data can be efficiently accessed in any random order. This contrasts with data storage media such as hard disks and CDs which read and write data consecutively and therefore the data can only be accessed in the same sequence it was written. Semiconductor memory also has much faster access times than other types of data storage; a byte of data can be written to or read from semiconductor memory within a few nanoseconds, while access time for rotating storage such as hard disks is in the range of milliseconds. For these reasons it is used for primary storage, to hold the program and data the computer is currently working on, among other uses.
As of 2017, semiconductor memory chips sell $124 billion annually, accounting for 30% of the semiconductor industry. Shift registers, processor registers, data buffers and other small digital registers that have no memory address decoding mechanism are typically not referred to as memory although they also store digital data.
