Adding Text to a Layout in Cadence PCB Editor
Introduction
Text is important on PCB layouts to identify the designers, project, version, components, etc. Typically, text can be placed on a silkscreen layer that sits on top of the copper. However, our manufacturing process in PRLTA 109 only supports text that is milled on the TOP COPPER or BOTTOM COPPER layers.
Altering Trace Widths in Cadence
Background
Why do I need to change my trace widths?
As you start to learn schematic and PCB design, you will have to learn how to alter your trace widths on boards. There are several different reasons that we have difference trace widths on boards. The specifications of traces for digital signals and power traces will be different. Therefore, we must change the widths of the traces on our boards. For more information about the importance of trace widths, you can read more here.
Changing a Hole Diameter in Cadence PCB Editor
Why would you need to change the hole diameter?
The default diameter of holes in Cadence is 0.3 mm. This is too small for most components to fit through, as well as too small for proper through-plating of vias. According to the Peralta PCB Mill specifications, hole diameters should be at least 0.5 mm (19.7 mil). Therefore, the following settings are recommended:
Changing the Default Via Padstack in Cadence PCB Editor
Introduction
A via is an electrical interconnection that connects one layer of a PCB to another layer of a PCB. Vias are typically used when two wires need to cross on the same side of a PCB design, but cannot without continuing the trace on a different layer. It is best to minimize the use of vias for boards being manufactured in Peralta to maximize reliability, but sometimes they are necessary in order to complete a design. If you do need a via, the default via padstack in Cadence is too small for the LPKF ProtoMat S63 PCB Mill that we use to manufacture PCBs in PRLTA 109. There are two ways to address this issue:
Changing the Library Search Path in Cadence PCB Editor
Why would I need to change the library search path?
When creating a custom PCB footprint for a component, it is stored somewhere on your computer. In order for PCB Editor to find where a custom footprint is stored, the library search path must be changed so that PCB Editor knows where to look.
Creating a Board Outline in Cadence PCB Editor
What is a board outline?
A board outline is the outermost boundary of a printed circuit board design. It is used by the PCB manufacturer to cut the printed circuit board to the specified size and shape.
Creating a Ground Plane in Cadence PCB Editor
What is a ground plane?
A ground plane is a large area of copper in a printed circuit board design that is connected to ground on the power supply.
