I'm using a small value (~60milliohm) and small-package (0402) resistor to measure current. When I probe the resistance with a (nice Agilent) DMM, the resistance is more like 100millohm though and it's messing up my current sensing. I've zeroed out the probes, I've measured across five or so different samples, and the resistance ranges around 100 +/- 15mOhm.
The resistor is placed very close to a current-sense amplifier
Are these very susceptible to the reflow procedure? If heat up the resistor too much does the resistance increase?