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Why sio2 is used as the insulator in MOS?

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bala9383

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why sio2(Silicon-di-oxide) is used as the insulator in MOS?

why not other materials can be used ??

plzz explain briefly
 

MOS Transistor

other materials like cu are being tried out now due to their low-k dielectric strength. This ensures faster switching speeds and lesser parasitic capacitances. please check this site for a list of other materials used

https://en.wikipedia.org/wiki/Low-K
 

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