Difference between DMOS and normal CMOS

[Alles Gute]

hi,everybody
What is DMOS? What's the difference between DMOS and nrmal CMOS?

 

[flatulent]

dmos structure

DMOS is a physical structure to make a MOS transistor. CMOS is a logic family using N and P carrier MOS transistors. In the DMOS the D stands for double diffused. One polarity diffusion is done through a hole in the oxide and then the other polarity of carrier diffusion is done. At the surface this produces the usual three areas of alternating polarity carriers that is used in making MOS transistors only the middle region (channel) is very thin (short).

 

[cretu]

dmos cmos

DMOS is a physical structure to make a MOS transistor. CMOS is a logic family using N and P carrier MOS transistors. In the DMOS the D stands for double diffused. One polarity diffusion is done through a hole in the oxide and then the other polarity of carrier diffusion is done. At the surface this produces the usual three areas of alternating polarity carriers that is used in making MOS transistors only the middle region (channel) is very thin (short).

If might add something, there is also a vertical power DMOS. It uses the same principle but it's using a vertical structure, using the burried layer as one of the S/D active areas. The trend is for the use of lateral DMOS

Added after 2 minutes:

DMOS is a physical structure to make a MOS transistor. CMOS is a logic family using N and P carrier MOS transistors. In the DMOS the D stands for double diffused. One polarity diffusion is done through a hole in the oxide and then the other polarity of carrier diffusion is done. At the surface this produces the usual three areas of alternating polarity carriers that is used in making MOS transistors only the middle region (channel) is very thin (short).

If might add something, there is also a vertical power DMOS. It uses the same principle but it's using a vertical structure, using the burried layer as one of the S/D active areas. The trend is for the use of lateral DMOS

It's used extensively in the automotive industry due to the high voltage/current capabilities(up to 40 -100Amps and 40~60V )

 

[lastdance]

what s dmos

Google keyword vertical DMOS.

It's a free device in many BiCMOS process, the drain is connected via sinker to the buried layer, and the conduction is through the tub in which it is sitting, therefore vertical its name.

 

[cretu]

dmos structure

Google keyword vertical DMOS.

It's a free device in many BiCMOS process, the drain is connected via sinker to the buried layer, and the conduction is through the tub in which it is sitting, therefore vertical its name.

Completely agree up to a point. Sometimes you really have to make special ones for the motives in my previous message. regards

 

[paladinzlp]

dmos 구조

NDMOD's Vth<0
DC analysis is the same as NMOS.
AC analysis is different to NMOS