Flex PCBs |
At PCB Prime, our flex PCB solutions are backed by expert PCB manufacturing and assembly, ensuring each design meets the highest standards for flexibility and durability. 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.
Here are the most common types of flex circuit construction:
- Single-sided flex PCB
- Back-bared flex circuits
- Double-sided flex PCBs
- Multi-layer flex circuits
- Rigid flex PCB
- Sculptured flex circuit board
Flexible PCB Capabilities & Tolerances
| MULTI-LAYER FLEX CIRCUITS | ENGLISH | METRIC | |
|---|---|---|---|
| Maximum Board Size | 19.68" x 13.38" |
500 x 340 mm |
|
| Maximum Board Thickness | 1 (copper) layer | 8.5 mil |
0.22 mm |
| 2 layers | 12.6 mil |
0.32 mm |
|
| 4 layers | 16.5 mil |
0.42 mm |
|
| Minimum Board Thickness | 1 (copper) layer | 2.5 mil |
0.065 mm |
| 2 layers | 4.7 mil |
0.12 mm |
|
| 4 layers | 11.8 mil |
0.30 mm |
|
| Maximum Number of Layers | 16 layers |
||
| Minimum PTH (Plated Thru Hole) diameter | 0.0079" |
0.2 mm |
|
| 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 | 0.002" / 0.002" |
0.05 mm / 0.05 mm |
|
| SURFACE FINISHES TYPES | |||
Lead Solder (HASL) |
OSP (Entek) |
||
Lead Free Solder (HASL) |
Electrolysis gold plating |
||
Immersion Gold (Electroless Nickel Gold - ENIG) |
Immersion Tin (White Tin) |
||
Immersion Silver |
|||
| MATERIAL | |||
FR-4 |
Teflon |
||
FR-5 |
Polyimide |
||
Aluminum |
BT |
||
Other material available upon request |
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