Chapter 4
Working with Parts
©
National Instruments Corporation
4-33
Use the
Thermal Relief
tab to choose what type of thermal relief the pin
will use when connecting to a copper area or power plane.
1.
Select the desired thermal relief in the
Type
box.
2.
Select the desired width of the spokes in the thermal relief from the
Spoke Width
drop-down list.
Viewing and Editing SMT Pin Properties
Complete the following steps to edit SMT (Surface Mount Technology)
properties:
1.
Select the desired SMT pin and select
Edit»Properties
.
2.
The
SMT Pin Properties
dialog box appears, consisiting of five tabs:
Attributes
,
General
,
Pad
,
Thermal Relief
, and
Pin Neck
.
To edit an SMT pin’s attributes, use the
Attributes
tab. Refer to the
section for more information.
To edit an SMT pin’s display style, use the following options in the
General
tab:
•
X
—The x-axis coordinate.
•
Y
—The y-axis coordinate.
•
Net
—The net this SMT pin is on (read-only)
•
Angle (degrees)
—The angle for the pin.
•
Board side
—Select the
Top
or
Bottom
radio button to set the side of
the board on which the SMT pin resides.
•
Units
—The unit of measurement.
•
To Trace
—The minimum space between the SMT pin and any trace.
Use the
Pad
tab to control the
Shape
and size of the through hole pin. The
Pad Preview
on this tab shows the SMT pin as it was created, the
Selection
Preview
shows how the SMT pin appears on the workspace.
Use the
Thermal Relief
tab to choose what type of thermal relief the SMT
pad will use when connecting to a copper area or power plane.
1.
Select the desired thermal relief in the
Type
box.
2.
Select the desired width of the spokes in the thermal relief from the
Spoke Width
drop-down list.
Use the
Pin Neck
tab to enter dimensions for the pin necks.
