National Instruments Graphical User Interface Ultiboard - Manual (Page 274)

Glossary
NI Ultiboard User Manual G-4 ni.com
T
Thermal Relief Area around a pin where no copper appears, but which is crossed by copper
lines to make connections. A thermal relief is used to dissipate heat during
the soldering process.
Through-Hole Via Normal via.
Trace Code The system provides 32 trace codes, each with a width and clearance.
“Clearance” describes the space required between pads and pads, between
traces and pads, and between traces and traces. This free space is
continuously checked by the real-time design rule check. Trace code
specifications can be exported as part of the design rules.
V
Vertex A vertex is a point of a polygon. A side of a polygon connects two vertices.
Via A plated through-hole in a printed circuit board used to route a trace
vertically (from one layer to another).
Visual Grid Provides a visual reference for you to visually align parts and traces.
W
Workspace The part of the screen where you build your design.