Si8000m / Si9000e / Speedstack / CGen What’s new for 2013 Si8000m / Si9000e / Speedstack / CGen January 2013 by Richard Attrill New ‘Process Window’ function We have received requests from Si8000m / Si9000e users to provide an option that determines the acceptable parameter range for a given target impedance. For example: If the target impedance is 50 ohms ± 5%, what is the acceptable range of dielectric heights (H1) that can be used? Another example: If the target impedance is 75 ohms ± 5%, what is the acceptable range of trace widths (W1) that can be used? This acceptable range is what some fabricators call the ‘Process Window’ and the following slides show how this new functionality has been implemented. New ‘Process Window’ function Selecting the new ‘Process Window’ toolbar icon will load the new option The first stage is to enter the Target Impedance & Tolerance and then select the structure Parameter. On selecting Calculate the minimum, nominal and maximum impedances is displayed. The parameter value for these impedances is then calculated using the Goal Seek technique, with the results displayed in the relevant boxes.
In this case, the Process Window for H1 is 3.60 to 5.11 In this example the trace width W1 parameter has been selected In this example the trace width W1 parameter has been selected.
You can download Si 9000 PCB Transmission Line Field Solver 11.04 from our software library for free. The program is categorized as Business Tools. The actual developer of the program is Polar Instruments Ltd. The most popular version among the program users is 11.0.