ABSTRACT

Printed wiring board (PWB) is, in general, a layered dielectric structure with internal and external wiring that allows electronic components to be mechanically supported and electrically connected internally to each other and to the outside circuits and systems. The components can be complex packaged very largescale integrated (VLSI), RF, and other ICs with multiple I/Os or discrete surface mount active and passive components. PWBs are the most commonly used packaging medium for electronic circuits and systems. Electronic packaging has been defined as the design, fabrication, and testing process that transforms an electronic circuit into a manufactured assembly. The main functions of the packagings include signal

distribution to electronic circuits that process and store information, power distribution, heat dissipation, and the protection of the circuits.