PCB

• Printed Wiring Board (PCB)


  used in electronics to build electronic devices
• 1. a place to mount the components
  2. provides the means of electrical connection between the components


  two purposes of construction of PCB
• Substrate


  gives the PCB its rigidity and thickness
• Fiberglass


  this is what a substrate is usually made of
• Copper


  a foil, which is laminated to the board with heat and adhesive
• Solder Mask


  The layer on top of the copper foil; gives the PCB its green color; to insulate the copper traces from accidental contact with other metal, solder, or conductive bits
• Silkscreen

  • applied on top of the solder mask layer
  • adds letters, numbers, and symbols to the PCB that allow for easier assembly and indicators for humans to better understand the board
  • to indicate what the function each pin or LED
• Breadboard


  way of making a temporary circuit

  for testing purposes
• Stripboard


  has parallel strips of copper track on one side
• Printed Circuit Board


  have copper tracks connecting the holes where the components are placed
• Surface Mount Technology


  method of constructing electronic circuits in which the components (SMC, or Surface Mounted Components) are mounted directly onto the surface of printed circuit board
• Soldering


  noun. refers to the alloy (a substance composed of two or more metals) that typically comes as a long, thin wire in spools or tubes

  verb. means to join together two pieces of metal in what is called a solder joint
• Soldering Iron


  supplies heat to melt solder so that it can flow into the joint between two workpieces
• Soldering Tips


  part of the iron that heats up and allows solder to flow around the two components being joined
• Wand


  part of the iron that holds the tip

  part that is handled by the user
• Base


  control box that allows the adjusting of temperatures
• Stand (Cradle)


  houses the iron when it is not in use
• Wave Soldering


  an in-line process in which the underside of the printed circuit board is treated with flux, then preheated and immersed in liquid solder