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# System prepended metadata

title: MOSFET

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# MOSFET

* ### **MOSFET**(metal-oxide-semiconductor field-effect transistor)is the "most" important device for advanced logic ICs such as the microprocessor and volatile memories such as DRAM and SRAM
*  ### **MOSFET** offers high density, low power consumption, simpler manufacturing processes and high yield
*  ### In this note we consider:
*   Basic characteristics of MOSFET
*   MOSFET scalling and short-channel effects
*   **Complementary MOS(COMS) logic circuit**--> most important 
*   Silicon-on-insulator devices
*   DRAM and SRAM
*   Power MOSFET

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# Introduction(Structure)
* ### MOSFET is composed of an MOS capacitor and two p-n junctions placed immediately adjacent to the MOS capacitor
* ### Figure below shows a perspective view of an MOSFET:
![](https://i.imgur.com/8egFZdZ.png)
![](https://i.imgur.com/BwFmyMB.png)

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# Basic Characteristics of MOSFET
![](https://i.imgur.com/3IfmbOO.png)
![](https://i.imgur.com/FwpTn6m.png)
![](https://i.imgur.com/NhixnPE.png)
![](https://i.imgur.com/OgDx59g.png)
![](https://i.imgur.com/WyPA0ed.png)
![](https://i.imgur.com/kML9dWY.png)
![](https://i.imgur.com/L39qNsx.png)
![](https://i.imgur.com/dpqvLdn.png)

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# Linear region

![](https://i.imgur.com/SMcuTlJ.png)

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# Saturation region
![](https://i.imgur.com/JB6raD1.png)
![](https://i.imgur.com/jGszOq8.png)
![](https://i.imgur.com/ZlJzrY8.png)
![](https://i.imgur.com/bHTLzQw.png)
* ## Velocity saturation region 
![](https://i.imgur.com/KdKOWGf.png)
![](https://i.imgur.com/pv2VxWE.png)
![](https://i.imgur.com/SIjxkGs.png)

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# Subthreshold region
![](https://i.imgur.com/xWxfC8n.png)
![](https://i.imgur.com/8JdvrKs.png)

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# Type of MOSFET

## There are 4 types of MOSFET, depending on he inversion layer.


![](https://i.imgur.com/CXItj4V.png)
