| The FPCB
is Flexible
Printed Circuits Board as abbreviation the
electrical component becomes small-sized anger and the circuit
board of hazard existing which confront in the tendency which
comes to be complicated PCB the hazard which overcomes a ewakness
it is a electronic component which is developed;
Flexible circuits are constructed by building
up component layers, eg. base, copper, coverlay, stiffener.
Bonding between each component layer is provided by an adhesive
layer (epoxy or acrylic). The materials selected must be appropriate
for either static (eg. one time bend into a camera) or dynamic
applications (eg. hard disk drive). If components are to be
attached, the base material must be selected to withstand solder
temperatures, and a stiffener may be added. Flexible
base materials are relatively dimensionally unstable and have
to be processed on small step & repeated blanks, typically
of a size only 20% of that used for rigid pcbs. They are significantly
more expensive than rigid pcbs. Final profiling and test will
often be carried out as single circuits. Mechanical tooling
must be selected according to the volume and accuracy required.
Tooling may be either CNC soft tooling (low cost but high unit
costs), steel rule (volumes up to a few thousand pieces, medium
cost, low dimensional stability), or hard steel punch &
die sets (durable, accurate, & high cost).
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