CONTOur plotted quantity range definition control
The CONTOUR line plots contours on a plotted two-dimensional area of the device, as specified by the most recent PLOT.2D line.
POtential = logical Mid-gap potential QFN = logical Electron quasi-fermi level QFP = logical Hole quasi-fermi level N.temp = logical Electron temperature P.temp = logical Hole temperature BAND.Val = logical Valence band potential BAND.Cond = logical Conduction band potential DOping = logical Total net impurity concentration IOn.imp = logical Net ionized impurity concentration ELectrons = logical Electron concentration Holes = logical Hole concentration NET.CHarge = logical Net charge concentration NET.CArrier = logical Net carrier concentration J.Conduc = logical Conduction current J.Electr = logical Electron current V.Electr = logical Electron velocity J.Hole = logical Hole current V.Hole = logical Hole velocity J.Displa = logical Displacement current J.Total = logical Total current E.field = logical Electric field Recomb = logical Net recombination Flowlines = logical Current flow lines
The above parameters specify the quantity to be plotted. For vector quantities the magnitude is plotted. Model dependent parameters (current and recombination) are calculated with the models currently defined, not with the models that were defined when the solution was computed. This allows the display of, for instance, Auger and Shockley-Read-Hall components of recombination separately. For consistent values of current, the models used in the solution should be specified. The quantity to be plotted has no default.
range definition
MIN.value = real MAx.value = real DEl.value = real NContours = integer CONstrain = logical (default is true)
MIN.VALUE and MAX.VALUE specify the minimum and maximum contours to be plotted. MIN.VALUE and MAX.VALUE default to the minimum and maximum values of the quantity to be plotted over the device (these are printed during execution). DEL.VALUE specifies the interval between contours. Alternatively, NCONTOURS specifies the number of contours to be plotted. If the plot is logarithmic, the minimum and maximum should be given as the logarithmic bounds. CONSTRAIN constrains the contours to lie between min/max values; if CONSTRAIN is turned off, the min and max contours extend out to +/-infinity.
control
LIne.type = integer (default is 1) ABsolute = logical (default is false) LOgarithm = logical (default is false) X.compon = logical (default is false) Y.compon = logical (default is false) MIX.mater = logical (default is false) PAuse = logical (default is false) COLor = logical (default is false) Grey = logical (default is false)
LINE.TYPE defines the plot line type. ABSOLUTE specifies that the absolute value of the variable be taken. For rapidly varying quantities, the LOGARITHM is often more revealing. Since many of the quantities may become negative, PADRE actually uses
to avoid overflow. To get the true logarithm of a quantity, specify ABSOLUTE and LOGARITHM - the absolute is taken first and there is no danger of negative arguments. X.COMPON and Y.COMPON take the x and y components of a vector quantity, respectively. MIX.MATER specifies that local vector averaging should be done over all materials to which the node belongs as opposed to just the hierarchical choice (see the PRINT line). The PAUSE option causes PADRE to stop at the end of the plot during an interactive run so that a hardcopy may be made before continuing. Execution can be resumed by hitting a carriage return. COLOR specifies that color fill (GREY is a grey scale fill), as opposed to simple lines, should be used to delineate contours; the contour colors are chosen by default, but the user can override this scheme using appropriate parameters on the OPTION line.
The following plots the contours of potential from -1 volts to 3 volts in steps of .25 volts:
CONTOUR POTEN MIN=-1 MAX=3 DEL=.25
In the next example, the log of the doping concentration is plotted from 1.0e10/cm**3 to 1.0e20/cm**3 in multiples of 10. By specifying ABSOLUTE, both the n-type and p-type contours are shown.
CONTOUR DOPING MIN=10 MAX=20 DEL=1 LOG ABS
In the following, current flow lines are plotted. The number of flow lines is 11 so that 10% of the current flows between adjacent lines.
CONTOUR FLOW NCONT=11