I have designed with both but have never done the replacement.
I shouldn't be hard - they work the same way.
Doug
Budijanto S wrote:
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Hi Dough Hale,
Do you have any experience to replace vacum tube with power MOSfet...???
Thank you
----- Original Message -----
From: Doug Hale <mailto:doughale@...>
To: Electronics_101@...
<mailto:Electronics_101@...>
Sent: Monday, October 29, 2001 12:54 PM
Subject: [Electronics_101] No metal in MOS?
The context of no metal had to do with fabrication of the transistor,
not interconnecting them.
MOS means metal oxide semiconductor.. the metal oxide forms the
transistor gate. A poly gate transistor
has the metal oxide replaced with poly-silicon. We still cal it a MOS
transistor - either due to tradition - or because PSS is harder to
say(ha ha). (and CPSS instead of CMOS would even be worse)
Doug Hale
Kevin Vannorsdel wrote:
>For RAM processes? This is interesting... are you saying you use
NO metal
>interconnects in RAM? Even for power distribution??
>
>Very curious. KV.
>
>________________________________________________
> Kevin Vannorsdel IBM Arm Electronics Development
> 408-256-6492 Tie 276-6492 kv@... KF6YCI
>
>Please respond to Electronics_101@...
>To: <Electronics_101@...>
>cc:
>Subject: Re: [Electronics_101] Re: Fuses--for kevin;-)
>
>
>
>
>hey ,
>
>just to add...now we use polysilicon instead of the metal...:-)
>
>Regards :-),
>
>--himanshu sharma
>----- Original Message -----
>From: Kevin Vannorsdel
>To: Electronics_101@...
>Sent: Monday, October 29, 2001 9:54 PM
>Subject: Re: [Electronics_101] Re: Fuses vs. resistors
>
>I'm new to this group so missed the CMOS topic (which I would have
>enjoyed)... CMOS transistors use metal as interconnects - mainly
>aluminum. The latest silicon processes are beginning to use
Copper as
>interconnects. This is fairly widely publicized so you may all
know
>this.
>
>The CMOS transistor itself is made of standard P and N type
silicon
>(with
>various doping levels) along with Poly-Silicon for the gate and
a bunch
>of
>silicon dioxide for the gate dielectric.
>
>Metal is still a very important issue in IC design. See my
previous
>comments on electromigration...
>
>KV.
>
>________________________________________________
> Kevin Vannorsdel IBM Arm Electronics Development
>408-256-6492 Tie 276-6492 kv@... KF6YCI
>
>Please respond to Electronics_101@...
>To: Electronics_101@...
>cc:
>Subject: Re: [Electronics_101] Re: Fuses vs. resistors
>
>
>
>heros,
>
>>or that the length of a wire has nothing to do with resistence
>> - mark
>>
>>>But I do find it surprising that one who likes to get things
stated
>>>
>>correctly does not want a wire to be called a resistor!!
>>
>
>Since these quotes are all mixed up and shortened I don't know
who said
>what
>and for certain what he said. Here's my parting shot on the fuze,
>resistor,
>etc. topic.
>I was wrong when I originally said that a fuze has no
resistance, and of
>course the resistance is required for it to fuze, i.e. blow,
when it's
>rated
>current passes through it. That something has resistance
doesn't make it
>
>a
>resistor. If it did we'd have to call everything that is not an
insulator
>
>a
>resistors, transformers, wires, fuzes, etc. A resistor is not
simply a
>device
>that has resistance but one in which resistance is utilized as
part of
>the
>circuit design, to achieve a voltage drop when connected in
series, to
>bypass
>current in a device when in parallel, i.e. shunt like the old
D'Arsonval
>(SP?) analog meters when used to measure current. Someone
earlier said
>that
>CMOS devices actually no longer use Metal, I don't know whether
that is
>so,
>but we don't stop calling them CMOS, which may be why I didn't
know that
>metal is no longer used in their manufacture.
>
>Anyway, that's my swan song on the issue.
>
>Jim
>
>
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