Let say it's on chip resistor, transistor and the resistor made of diffusion with heavier doping.It depends on the resistor material; some have a positive temperature coefficient, some have a negative one.
Let say it's on chip resistor, transistor and the resistor made of diffusion with heavier doping.
Let say it's on chip resistor, transistor and the resistor made of diffusion with heavier doping.
No.
Unless we are talking about some extreme conditions (like very deep impurities - like In in Si, or extremely high or low temperatures) - in doped semiconductor, the dominant effect would be decrease of carrier mobility with increasing temperature.
So, temperature coefficient in doped semiconductor (acting as a resistor) is positive, i.e. resistance increases with temperature.
Resistivity of semiconductors (bulk doped semiconductor) is many orders of magnitude lower than that of insulators, that's why different names - insulator, conductor, semiconductor.
Kill ohm/square, that in micron square unit?Tens of kΩ are not huge resistances. On ICs we have an access to a number of different kind of resistors. Well resistors and high resistive un-salicided poly's provide sheet resistance in order of kΩ/sq.
The temperature coefficient depends on many thing (i.e. doping) so it could be both positive and negative for resistors used in IC. Not only metal materials are used as conductors.
ohm/sq is dimensionless, simply the resistance of a structure of same length and width.
For argument sake, ?lets say the article is correct. What's the percentage change in resistance per C degree temp change typically?Although the article (C. Yoo and J. Park, A new compact temperature-compensated CMOS current reference, ELECTRONICS LETTERS 6th December 2007) , claims a negative temperature coefficient of Rs, it doesn't tell anything about the utilized technology. The authors may be wrong in this point.
For argument sake, ?lets say the article is correct. What's the percentage change in resistance per C degree temp change typically?
For pure metals, the temp coefficient is almost constant: a google search shows the value is close to 0.003 to re0.004 /C (http://hyperphysics.phy-astr.gsu.edu/hbase/Tables/rstiv.html#c1)
It can be very different for alloys and semiconductors. For intrinsic semiconductors, you need to look up their band structures.
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