PCB and Circut Design Training

Pcb (printed circuit board) is a thin board of fibreglass or laminated material in which self- contained interconnected electronic components are found. It electrically connects and mechanically supports all the electrical components. It is done by using conductive tracks or through the laminated copper sheets.
It is found in beepers, pagers, radars or computer systems. The applications of pcb can be found in desktop and laptop computers, video cards, controller cards, network interface cards and expansion cards. Pcbs can be divided into three categories on the basis of copper layers:
single sided (only one layer).
Double sided (two layers).
Multi-layer (more than two layers).
Pcbs are usually green in colour. In case of advanced pcb the components such as capacitors, resistors or active devices can be present.
History of pcb
1947 : the development of early pcb can be traced back to 1920, but it was in 1947 when double sided pcb came into being which contained plated through holes.
1957 : formation of ipc (institute of printed circuits) took place.
1960 : production of multilayer (4+ layers) pcb began.
1960-1970 : boards were designed using 4:1 red and blue line vellum method, and the circuitry and overall size of the boards were becoming smaller, and hot air soldering methods began to be used.
1992 : genesis 2000 software for pcb, cam and dfm was founded by valor computerized systems.
1995 : implementation and use of micro-via technology in pcb production started, hence hdi (high density interconnects) pcb came into existence.
1997 : odb++ printed circuit board manufacturing data was released by valor computerized systems.
2010 : the production of elic (every layer interconnect) begins.