WHAT ARE FLEXIBLE PRINTED CIRCUITS?
Flexible printed circuit (FPC) designs share many advantages over printed circuit boards (PCB), however, share many of the same challenges PCB designs. They are also excellent alternatives to membrane switches where ruggedness, reliability, and/or component use are necessary objectives. The very nature of a flex circuit being able to bend and flex make it as much a mechanical device as an electrical one. This creates a special set of requirements unique to flexible circuitry. Understanding how these requirements interact is key to a successful, and cost effective solution.
Flexible printed circuits are designed to three (3) Circuit Classes:
- Class 1 – These circuits have the minimum inspection, testing, and performance requirements, as defined by IPC-6013. These circuits are typically designed for disposable electronics.
- Class 2 – These circuits have moderate inspection, testing, and performance requirements, and are generally designed for use in many consumer electronics.
- Class 3 - These circuits have the highest levels of inspection, testing, and performance requirements. As such, these circuits are generally designed for medical devices, and many military and defense applications.
In addition to classes, flexible printed circuits are offered in four (4) type variations:
- IPC 6013 Type 1 – Single layer, with insulating material on one or both sides, and access to the conductors.
- IPC 6013 Type 2 – Two layers with insulating film between both layers; plated interconnect holes; and access to the conductors are one or both sides.
- IPC 6013 Type 3 – Three or more layers with insulating film between both layers; plated interconnect holes; and access to the conductors are one or both sides.
- IPC 6013 Type 4 - Two or more layers with insulating film between both layers; ability to incorporate a rigid PCB; plated interconnect holes; and access to the conductors are one or both sides.
Nelson-Miller offers all types and classes of flexible printed circuits.
Due to the unique nature of the design and manufacturing of flexible printed circuits, Nelson-Miller employs a team of talented, and well-skilled engineers who will work with you and your team to ensure a successful, and cost-effective solution.