1. CONFIDENTIAL
PCB designing basics and tools used for it
Akash J
Jr. Engineer

2. Overview
What is PCB ?
What are basic steps in PCB designing ?
What are different tools used for PCB designing ?

3. 2
What is PCB
A printed circuit board (PCB) is the board base for physically supporting and wiring the
surface-mounted and through-hole components.
woven
fiberglass cloth
with an epoxy
resin.
A basic building block of the PCB is FR-4 ( Flame Retardant ) panel with a thin layer of copper
foil laminated to one or both sides.
PCB thickness varies from 0.2 mm (for single layer board) up to
6.00 mm (for max. 38 layers).
Generally, there is a Ground plane, a Power plane and rest are the signal layers in
multilayer PCB.

4. 3
Required input files for designing
Schematic diagram Netlists
Board drawing
Bill Of Materials
Datasheets
Silkscreen legend
Trace-routing rules

5. 4
What are basic steps in PCB designing
1. Schematic capture –
• This is the first step in designing PCB. It is mandatory step in any tool, but it can be
done manually or automatically.
• Creating a part, if it is not available
in parts library.
• Simulation of circuit.

6. 5
2. Component placement –
• Assigning decals to each part. If the part is new then we need to create a decal for that
part according to its data sheet.
• Arranging parts according to functionality
and physical shape of board.

7. 6
3. Routing & exporting the output file –
• Creating each route according to design rule and netlists.
• Use of layers and planes for efficient
routing with the help of vias.
• Can be done manually or auto routing.
• Exporting the required layers in Gerber
format or ODB format

8. 7
What are the different PCB designing tools
1. Cadence Allegro
Design entry CIS for schematic capture.
Design entry HDL for schematic capture using netlists.
Package designer for creating a part and assigning a decal to it.
PCB router for routing and PCB editor for generating required output format.

9. 8
2. Mentor Graphics PADS
PADS logic for schematic capture.
PADS layout for component placement.
PADS router for routing.

10. 9
3. Altium PCB designer 4. Mentor Graphics Xpedition
5. Eagle PCB design 6. Dip Trace PCB design software

11. 10
Thank you
References
http://www.radio-electronics.com
https://www.mentor.com/blogs
https://www.pads.com
https://www.alitum.com
http://diptrace.com/
https://cadsoft.io/
http://www.electroschematics.com/