3. Also it is start point of the invention, it still plays a major role in the industry.
This Single Sided PCB is invented to give a good mechanical base for components.
Reliability of connections compared to hand wiring and another big benefit is ease
of assembly production of an electronic device in volume.
In through hole device technology, it does have it’s limitations in interconnecting
large numbers of components as all the tracks are on one side.
Due to surface finishes like Lead free hot air level, Nickel Gold and organic
surface protection, single sided boards can used for surface mount devices as well
as through hole.
6. The double sided “PTH” (plated through holes) PCB is the universal workhorse of the
electronics industry.
Increasing complexity and density of components.
In this “Plated Through Holes” where the copper connections go right through the
connecting holes to the opposite side of the board.
This PTH Connections either form simple electrical connection between both sides of
the PCB (Via Holes),or electrical connectivity and mechanical support for leaded
components.
9. The multilayer PCB is the development of the double sided PCB.
Increasing complexity and density of components.
Adding just a power and ground plane to the inside of the board allowed the
components to be powered with just two plated holes to the inner layers rather than a
track back to a power/ground point.
Highly complex and compact circuits.
High Density and Hole Technology.
