Flexible PCB

Overview

Flex PCBs are built on flexible polyimide or polyester films, allowing them to conform to complex shapes or dynamic mechanical requirements. Rigid flex PCBs combine multiple rigid layers with flexible layers, laminated together into a single structure. This hybrid approach reduces interconnects, enhances signal reliability, and simplifies enclosure design.

 

Applications

Flex PCBs are thin and lightweight, allowing for compact designs that save space and reduce the overall weight of electronic devices, which is particularly important for aerospace, automotive, and wearable applications.

 

Specifications

Feature	Capability	Feature	Capability
Layer	1-12	Min. bend radius of single layer	3‐6 times of board thickness
Board thickness (without stiffener)	4‐40 mil	Min. bend radius of double layer	7‐10 times of board thickness
Tolerance of single layer	±1.0mil	Min. bend radius of multi‐layer	10‐15 times of board thickness
Tolerance of double layer (≤12mil)	±1.2 mil	Min. mechanical drill hole	4 mil
Tolerance of multi‐layer (≤12mil)	±1.2 mil	Inner Layer Trace/ Space	2/ 2 mil
Tolerance of multi‐layer (12mil‐32mil)	±8%	Outer Layer Trace/ Space	2/ 2 mil
Tolerance of board thickness (including PI stiffener)	±10%	Solder mask color	Green\Black
Min. board size	0.0788" *0.1576" (without bridge) 0.3152" * 0.3152" (with bridge)	Surface treatment	HASL, ENIG, ENEPIG, Electrolytic Nickel Gold, Soft gold, Hard gold, Immersion silver and OSP, Immersion tin
Max. board size	8.668" * 27.5"	Laser accuracy (Routing)	±2 mil
Impedance control tolerance	±4Ω (≤50Ω), ±7% (>50Ω)	Punching accuracy (Routing)	±2 mil ‐ ±6 mil
Min. overlay bridge	8 mil

 

Competitive Advantage

Flex PCBs are widely used across various industries due to their unique combination of flexibility, durability, and design versatility.

The flexible nature of these materials allows flex PCBs to bend, fold, and twist without causing damage to the circuits or impacting their functionality.