You fill find all the basics you need to know about PCB and its types and also all information regarding the manufacturing process

2. Presentation By: Manish K
Arun Naik

3. Contents
• Introduction to PCB
• History
• Types of PCB
• Composition
• Manufacturing process
• Advantages and disadvantages
• Colour coding of Capacitor / Resistor
• SMD component Identification

4. What Is PCB ?
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.

5. PCB

6. Different Types of Printed Circuit Boards
PCBs have copper tracks to connect the holes where the various
components are located They are specially designed for each and
every circuit and build construction very easy. Though, making the
PCB necessitates special tools. The different types of printed
circuit boards mainly include the following
• Single Sided PCBs
• Double Sided PCBs
• Multilayer PCBs
• Rigid PCBs
• Flex PCBs
• Rigid-Flex PCBs

7. Single Sided PCBs
This single sided printed circuit board includes just one layer of base
material or substrate. One end of the substrate is coated with a thin
layer of metal, usually copper because it is a good electrical
conductor. Generally, a protecting solder mask be seated on the peak
of the copper layer, and a last silkscreen coat may be applied to the
top to mark elements of the board.

8. Double Sided PCBs
This type of PCBs is much more familiar than single-sided boards.
Both sides of the board’s substrate include metal conductive layers,
and elements attach to both sides as well. Holes in the PCB let
circuits on a single side to attach to circuits on the other side.

9. Multilayer PCBs
These PCBs further enlarges the density and complexity of PCB
designs by adding extra layers beyond the top & bottom layers
seen in a configuration of double sided. With the accessibility of
over many layers in multilayer printed circuit board
configurations, multilayer PCBs let designers to make very thick
and highly compound designs.

10. Rigid PCBs
In addition to having different numbers of layers & sides, Printed
circuit boards can also come in changing inflexibilities. Most
customers usually think of inflexible PCBs when they image a circuit
board. Rigid printed circuit boards use a solid, rigid substrate material
like fiberglass that remains the board from twisting. A motherboard
within the tower of a computer is the best example of an inflexible
PCB.

11. Flex PCBs
Generally, the substrate in a flexible board is a flexible plastic. This
fundamental material permits the board to fit into forms that inflexible
boards cannot & to turn or shift during use without harmful the circuits
on the printed circuit board. Though flex boards tend to charge more to
intend and create than rigid PCBs, they come with a number of
advantages.

12. Rigid-Flex PCBs
Rigid flex boards merge technology from both flexible and rigid circuit
boards. An easy rigid-flex boards comprises of a rigid circuit board
that joints to a flex circuit board. These boards can be more compound
if design requests demand.

13. PCB Composition
1. FR4
2. Copper
3. Solder mask
4. Silkscreen

14. 1)
4)3)
2)

15. Step 1: Design and Output
Step 2: From File to Film
Step 3: Printing the Inner layers: Where Will the Copper Go?
Step 4: Removing the Unwanted Copper
Step 5: Layer Alignment and Optical Inspection
PCB Manufacturing Process Steps

16. Step 6: Drill
Step 7: Final Etching
Step 8: Solder Mask Application
Step 9: Surface Finish gold or silver laetr
Step 10: Silkscreen
Step 11: Electrical Test

17. • Schematic Capture
• Component Footprint Editor
• PCB Layout
• PCB Auto router
• Analog/Digital Simulator
• Signal Integrity Analysis Tools
• Vendors :
– Orcad (Cadence)
– Allegro (Cadence)
– Eagle (Cadsoft)
– P-CAD (Altium)
PCB Design Tools

18. Capacitor colour coding

19. Resistor colour coding