toolbar button
toolbar buttonThis item of the Plot
menu - or the button -
is available only if the active function plot window contains a cumulative or
a differential structure function.
Once selected, a browser with names of structural materials common in the electronics and microelectronics industry is shown as illustrated in Figure 4‑45. The materials are taken from a materials data base. It is stored in a file called matlib.dat. located in the program folder of the T3Ster-Master program. This is a pure ASCII file that can be easily extended with new material entries. For the format of this file, refer to Appendix A. For background of estimation of geometrical dimensions refer to Section 3.3.8.
Selecting a material in a cumulative structure function window the cursor position (always expressed as thermal capacitance) is also displayed as volume of the given material (Figure 4‑46). This is done using the (volumetric) specific heat values from the matlib.dat file. For calculating the volume of a given material section the value measured at the beginning of the section has to be subtracted from the value measured at the end of the section.
Figure 4-45: The Materials Browser window.
Figure 4-46: Estimation of geometrical dimensions: the volume of a copper cylinder l
Selecting a material in a differential structure function window the cursor position (always expressed as thermal capacitance / thermal resistance) is also displayed as cross-sectional area of the heat-flow path (Figure 4‑47). This is done using the (volumetric) specific heat and thermal conductivity values from the matlib.dat file.
Figure 4-47: Estimation of geometrical dimensions: the volume of a copper cylinder l
