The Shorting Copper May Be Removed At A Later Date To Allow The Application Of An Optional Shorting Jumper.įigure 4: Net Tie (In BOM) Used To Designate A Two Pin Header With The Pins Initially Shorted This Component Would Call Out The Header Part In The BOM. For instance, a two pin Net Tie component may be represented to look like a piece of wire in a schematic sheet (totally hiding its existence).įigure 3: A Net Tie footprint Possibly Used To Short Two Polygons Of Differing Net Names. The graphic for a Net Tie component is arbitrary and in some cases unnecessary. The simplest form of a PCB layout net tie is a two pin component associated with a two pad footprint in which the pads are connected together with copper features.Īs with other schematic symbol types in board layouts, the display of symbol pin designators and display names are optional, schematic wiring between pins determines net connectivity, and there is a pin-to-pad connectivity established between the schematic and printed circuit board PCB. Both types will be explored in this paper. Using the Net Tie (In BOM) allows materials to be called out in the BOM.

Net connectivity between the schematic symbol pins and printed circuit board PCB footprint pads is established in the customary way however, no line item will appear for this component in the Bill Of Materials (BOM). When using a Net Tie, the component schematic symbol graphic is attached to a specific type of footprint containing copper features connecting (shorting) the pads together. Each type is available on the pulldown options for Type in the Component Properties dialog. When using net ties to meet pcb design requirements, there are two types of Net Ties to consider: Net Tie and Net Tie (In BOM).

Using Net Ties to Meet PCB Design Requirements:ĭefining a Net Tie component can just be a matter of specifying it in the Type field of the Component Properties dialog in the right software.įigure 1: Net Tie Component Properties Dialog TYPES OF NET TIES FOR PCB ASSEMBLY

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