1. PCB
Shweta jadhav

2. A PCB is a printed circuit board, also
known as a printed wiring board. It is used
in electronics to build electronic devices. A
PCB serves two purposes in the
construction of an electronic device; it is a
place to mount the components and it
provides the means of electrical connection
between the components.

3. 
Conducting layers are typically made of thin
copper foil.

The board is typically coated with a solder
mask that is green in color. Other colors
that are normally available are blue and red.

Unwanted copper is removed from the
substrate after etching leaving only the
desired copper traces or pathways

4. 
Components

Pads

Traces

Vies

Top Metal Layer

Bottom Metal Layer

5. 


Components are the actual devices
used in the circuit.
This includes input/output connections.
I/O ports, including power supply
connections, are also important in the
PCB design.

6. 



The PCB needs to be mechanically
secured to something.
Could be the chassis-consist of metal
frame on which the circuit boards and
other electronic components are
mounted.
Could be another PCB/socket on PCB.
Could be attachments to a heat sink.

7. High frequency circuits
Series Inductance
Shunt Capacitance
Inductive Coupling
Capacitive Coupling

8. Steps in PCB design process

9. 1.
Film Generation

10. 2. Shear Raw Material
Industry standard 0.059" thick, copper clad,
two sides

11. 3. Drill Holes

12. 4. Electrolux copper
Apply copper in hole barrels

13. 5. Apply Image
Apply Photosensitive Material to
develop selected areas from
panel

14. 6. Strip and Etching
•Remove dry film, then
etch exposed copper
•Tin protects the copper
circuitry from being
etched

15. 7. Solder Mask
Apply solder mask area to
entire board with the exception
of solder pads

16. 8. Solder Coat
Apply solder to pads

17. 9. Silkscreen
Apply white letter marking
using screen printing
process