Flex PCBs, also known as flexible printed circuits or flexible electronics, provide greater options for designers and engineers when assembling electronic circuits.
They are constructed from flexible, high-performance plastic material, usually polyimide, which enables the board to bend or "flex" during use. This flexibility opens them up to use in a wide range of applications.
Rigid-flex are a type of high-adaptability printed circuit boards that use both flexible and rigid-board construction in an application. Though they offer greater spatial effiency, rigid-flex PCB require different design rules and can be more challenging than designing a rigid board. PCB International is experienced with helping many of our customers bring their complex rigid-flex design to market. All of our products come with full engineering DFM support.
Here are the most common types of flex circuit construction:
|MULTI-LAYER FLEX CIRCUITS|
|Maximum Board Size||19.68" x 13.38"||500 x 340 mm|
|Maximum Board Thickness||0.0945"||2.4 mm|
|Minimum Board Thickness||0.0315"||0.8 mm|
|Maximum Number of Layers||Single-sided up to 16 layers|
(Plated Thru Hole) diameter
|Maximum aspect ratio||
10:1 (max. thickness 0.0066",
min. PTH 0.0079")
10:1 (max. thickness 2mm,
min. PTH 0.2 mm)
|Minimum Traces/Spaces||0.003" / 0.003"||75 / 75 µm|
|SURFACE FINISHES TYPES|
|Lead Solder (HASL)||Immersion Silver|
|Lead Free Solder (HASL)||Electrolysis gold plating|
(Electroless Nickel Gold - ENIG)
|Immersion Tin (White Tin)|