why p+ poly resistors are preferred over n+ poly resistors?

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kapilsn

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N+ and P+ poly resistors

when we say that it is a n+ poly resistor ,do we mena that the poly is doped with n+.??
Also can anyone tell me why it is said that p+ poly resistors are preferred over n+ poly resistors.
 

Re: N+ and P+ poly resistors

kapilsn said:
when we say that it is a n+ poly resistor ,do we mena that the poly is doped with n+.??
Click to expand...
Yes.
kapilsn said:
Also can anyone tell me why it is said that p+ poly resistors are preferred over n+ poly resistors.
Click to expand...
Because generally p+ poly resistors have a lower TC1 (but their VC1 mostly is larger than that of n+ poly resistors).
 
Usually the sheet resitance of p+ poly is larger than n+ poly. That helps when you try to save area.
 
Re: N+ and P+ poly resistors

kapilsn said:
when we say that it is a n+ poly resistor ,do we mena that the poly is doped with n+.??
Also can anyone tell me why it is said that p+ poly resistors are preferred over n+ poly resistors.
Click to expand...

Check with foundry's mismatch report and you will know the answer.
 
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