CONFIDENTIAL

PCB designing basics and tools used for it

Akash JJr. Engineer

Overview

What is PCB ?

What are basic steps in PCB designing ?

What are different tools used for PCB designing ?

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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.

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Required input files for designing

Schematic diagram Netlists

Board drawingBill Of Materials

Datasheets

Silkscreen legend

Trace-routing rules

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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.

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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.

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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

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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.

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2. Mentor Graphics PADS

PADS logic for schematic capture.

PADS layout for component placement.

PADS router for routing.

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3. Altium PCB designer 4. Mentor Graphics Xpedition

5. Eagle PCB design 6. Dip Trace PCB design software

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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/