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The second example is a structure proposed by Gummel [28] as shown in
Fig. 3.8b. It can be shown that the pentagon can be transformed
into an equivalent quadratic resistor with side-length 2^{ . }*a*. This is
quite a severe test for both the grid generator and the implemented
discretization of the semiconductor equations. The simulation results are
identical to Fig. 3.11 and hence not shown.

*Tibor Grasser *

1999-05-31