Use the formula to determine the following resistor values.

Answers

1.	Divide L by W, then multiply by ?.
2.
3.
4.
5.

Contact Resistance

If we make and measure a square resistor, we can determine the ohms-per-square of the body material quite easily, especially if the square is very big.

Early engineers made lots of square resistors of different sizes 10, 20, 30, 40 microns wide, for instance. They plotted a graph of square size versus resistor value. The graph was expected to be constant, since they knew that all squares of the same material have the same resistance value.

Figure 4-17: The resistance of a square of poly should stay constant even as your square increases size, as discussed previously.

What we see in reality, however, is that the smaller resistors, as measured through their metal contacts, give a measured value that is higher than expected. This discovery was quite surprising.

Figure 4-18: In...