Printed Circuit Boards (PCBs) are the foundation of contemporary electronic gadgets, playing an essential duty in powering and connecting the parts that make our gadgets smarter and much more reliable. With the fast innovation in innovation, numerous kinds of PCBs have emerged, each accommodating certain needs and applications. This essay https://www.ird.gov.lk/en/Lists/QuickFeedback/DispForm.aspx?ID=78815