Thermal Connect Reduction (Thermal)

Reports all incidents of thermal connectivity reduction in negative layers where thermal pads are flashed.

Internal ERF Name

<Area>:thermal_percent_red

Measurement Shape

Measurement ID

Bounding box around thermal

None

Layers Displayed

Power and ground (or mixed) layer

Graphic

Purpose

If the drill located inside the thermal has insufficient electrical connectivity to the surrounding plane, it may not provide the required functionality, especially in high speed designs.

Function

Reports all incidents of thermal connectivity reduction in negative layers where thermal pads are flashed. Measurement is expressed as a percentage.

The overall electrical connectivity of a thermal pad is the sum of its defined spoke widths. The actual connectivity is the sum of actual spoke widths. The percentage reduction is calculated according to this formula:

ERF Parameters

 

ERF Variables

thermal_shrink_outer

Limitations