22.01.2015

Mentor Expedition Library Tutorial: Display Control Settings for PCB Library

Mentor’s Display Control gives designers and librarians myriad options for influencing how a design is displayed on the screen. The goal of any display scheme is to have any information a designer needs readily visible, so more time is spent working, as opposed to scouring the design for the portion you wish to work on. While the individual colors chosen are personal preference, best practices exist for both library and PCB design work. Let’s take a look at how many of Optimum’s librarians configure their Display Controls.

Colors

The goal of adjusting the default colors in Display Control is to ensure all portions of a PCB footprint are visually distinct, and able to be quickly identified by a librarian or designer. Display colors can be adjusted from Mentor Cell Editor by clicking View > Display Control.

Note: For the purposes of this article we’ll be looking at one ODA librarian’s standard setup, individual color choices will vary by user. The most important factor is that all colors be unique for easy identification.

Placement Outline: Dark Blue

Assembly Outline: Yellow

Silkscreen Outline: Dark Pink

DFA Bound Top: Light Pink

Solderpaste Top: Maroon

Soldermask Top: Teal hatched pattern

Solderpaste Bottom: Blue

Soldermask Bottom: Yellow hatched pattern

Mounting Holes: Dark Green

Assembly Part Number: Magenta

Assembly Reference Designator: Orange

Silkscreen Reference Designator: White

Line Widths

Next, we’ll take a look at line and typeface width, height, and font. Maintaining consistency in the library begins with part labeling. Ensuring that labeling is consistent across all parts leads to cleaner designs and less problems during layout and assembly.

The primary goal of line widths for the various part layers in a PCB library component is to ensure that all layers are easily visible when stacked on top of one another. This allows a librarian to quickly verify that all necessary layers for the part are both present, and accurate.

Placement Outline

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Line Width: 0

Assembly Outline

display_control_post_3

Line Width: 0.1

Silkscreen Outline

display_control_post_4

Line Width: 0.12

DFA Bound Top

display_control_post_5

Line Width: 0

Text

The goal of text on a PCB component should be to clearly identify the part number and reference designator to the designer, and have consistent silkscreen sizing for easier assembly.

Assembly Layer Text

Reference Designator

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