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why not place contact directly on the gate of transistors?

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yann_sun

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Hi,
I mean the channel area of mos. Under some circumstances, contact and via are placed directly on the gate of mos in anti-radiation application for an example. Many design rules also mention that it is not recommended to place contact on gate.
Thanks.
 

Re: why not place contact directly on the gate of transistor

You know that Cgs is significant in MOSFET, if you connect the driver directly to the MOSFET gate without a resistor, you will make the driver output overloaded or even shortcircuited and it must be blown out.

nguyennam
 

Re: why not place contact directly on the gate of transistor

Since the insulating material is very thin, the process to try making the contact will destroy the insulating material.
 

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    yann_sun

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