part 2 : let’s define some Terminology that you may hear whe

2018-11-23 18:00Writer: qyadminReading:

       1.Plated through hole - a hole on a board which has an annular ring and which is plated all the way through the board. May be a connection point for a through hole component, a via to pass a signal through, or a mounting hole.

  2.Pogo pin - spring-loaded contact used to make a temporary connection for test or programming purposes.

  3.Reflow - melting the solder to create joints between pads and component leads.

  4.Silkscreen - the letters, number, symbols, and imagery on a circuit board. Usually only one color is available, and resolution is usually fairly low.

  5.Slot - any hole in a board which is not round. Slots may or may not be plated. Slots sometimes add to add cost to the board because they require extra cut-out time.

  6.Solder paste - small balls of solder suspended in a gel medium which, with the aid of a paste stencil, are applied to the surface mount pads on a PCB before the components are placed. During reflow, the solder in the paste melts, creating electrical and mechanical joints between the pads and the component.

  7.Solder pot - a pot used to quickly hand solder boards with through hole components. Usually contains a small amount of molten solder into which the board is quickly dipped, leaving solder joints on all exposed pads.

  8.Soldermask - a layer of protective material laid over the metal to prevent short circuits, corrosion, and other problems. Frequently green, although other colors (SparkFun red, Arduino blue, or Apple black) are possible. Occasionally referred to as “resist”.

pcb backup board
pcb back up board backup material