curved mosfet idea

[Jamie Morken]

Hi,

I was thinking about how to make a mosfet have low on state resistance
and also have low gate capacitance while not taking up too much space:

"http://www.rocketresearch.org/new/curved-mosfet/curved-mosfet.JPG"

I think this design should:

1. minimize gate capacitance by making a longer gate
(parallel capacitance)

2. minimize the on-state resistance by making a wider current path
(parallel resistance)

3. keep the area used to a minimum

Any idea if this would be any good?

cheers,
Jamie

 

[[email protected]]

Hi,

I was thinking about how to make a mosfet have low on state resistance
and also have low gate capacitance while not taking up too much space:

"http://www.rocketresearch.org/new/curved-mosfet/curved-mosfet.JPG"

I think this design should:

1. minimize gate capacitance by making a longer gate
(parallel capacitance)

2. minimize the on-state resistance by making a wider current path
(parallel resistance)

3. keep the area used to a minimum

Any idea if this would be any good?

cheers,
Jamie

How would its cost compare with current, commercially available
mosfets? Would it be more difficult to manufacture? (Would its
construction cost make it more expensive?)

Give it a shot, let us know how it goes...

 

[Jim Thompson]

Hi,

I was thinking about how to make a mosfet have low on state resistance
and also have low gate capacitance while not taking up too much space:

"http://www.rocketresearch.org/new/curved-mosfet/curved-mosfet.JPG"

I think this design should:

1. minimize gate capacitance by making a longer gate
(parallel capacitance)

2. minimize the on-state resistance by making a wider current path
(parallel resistance)

3. keep the area used to a minimum

Any idea if this would be any good?

cheers,
Jamie

"Any idea...? Yes. It wouldn't be any improvement. Calculate gate
area (gate capacitance) versus _effective_ W (inversely proportional
to ON resistance).

...Jim Thompson