Purpose |
If the drill that is located inside the thermal has no sufficient electrical connectivity to the surrounding plane, it may not provide the required functionality, especially in high-speed designs. |
Function |
Reports all incidents of reduction in thermal connectivity. Measurements are circles whose diameter in mils represents
the percentage reduction in connectivity. The larger the circle the more
serious the reduction. |
Activation |
When layer is negative and thermal pads in the layer are
flashed (not drawn). |
Known Limitations |
The size of the circle representing the connectivity
reduction is always given in mils. The results of this category are best
reviewed in imperial units. |
The overall electrical connectivity of a thermal pad is defined
to be the sum of the defined spoke widths. The actual connectivity is the sum
of actual remaining spoke widths. The percentage reduction is defined as
follows: