What is a pad in pcb design A pad is the exposed region of metal on a circuit board that the component lead is soldered to Multiple pads in conjunction are used to generate the component footprint or land pattern on the pcb What is a pad stack in pcb design A pad stack refers to the combination of copper pads, drilled holes, and other features that form the connection point between a component and the pcb. Select all vias that you wish to convert in the design space and choose the tools » convert » convert selected vias to free pads command from the main menus
Pad stack design refers to the process of defining the physical and electrical properties of the pads used to connect components to a printed circuit board (pcb) The pad stack includes the pad size, shape, drilling requirements, and layer stackup of the pads. The padstack consists of combinations of letters and numbers that represent shape, or dimensions of lands on different layers of printed boards or documentation The name of the padstack needs to represent all the various combinations. Each pin can have any pad type (regular, thermal relief, antipads, and custom shapes) defined on each etch/conductor layer of the design For negative artwork layers, the layout editor uses thermal reliefs and antipads.
It consists of various layers, including the pad itself, the dielectric material, and the copper traces. Part 1 reviews the various aspects of the unplated holes in the pad stack while part 2 will address how you go about routing the traces associated with these fine pitch components.
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