Printed Circuit Board (PCB)

Printed Circuit Board
1. It is mechanically supports and electrically connects electronic components using conductive tracks instead of wires. Printed circuit board is the heart of every electronic device.

2. These boards are made up of special materials that do not conduct electricity such as fiber and glass. 

Printed Circuit Board

Electronic Components Connection Without Printed Circuit Board

An early 1960's printed circuit boards are not available. those days electronic components are point to point to connect through wires. 

In this connection any problem occurs, very difficult to find out and repair. 

Early 1960's -Vintage Television Connections

Designing Process of a PCB
Step 1
Design PCB circuit using 'Eagle circuit board' design software.

PCB Circuit Design with 'Eagle Circuit Board' Software

Step 2
Designed PCB circuit printed out on a plastic sheet.

PCB Circuit on Plastic Sheet

Step 3

1. Cut the required size insulated fiber glass and laminated with thin copper plate.

2. Printed designed circuit plastic sheet properly placed on the thin copper plate and provide heat. Then circuit print on the copper layer with copper tracks and remove the plastic sheet.

Copper Laminated Fiber Glass

Copper Tracks Produced on the Copper Layer

Step 4
To remove the untracked  copper using chemicals like ferric chloride, ammonium per-sulphate, etc. Then produce copper tracked printed circuit on the insulated fiber glass.

Copper Tracked Printed Circuit 

Step 5
Machines and carbide drills are used to put holes on the printed circuit board and to place the electronic components.

Printed Circuit Board With Electronic Components