FLEX
The demand for flexible PCBs is increasing in all business segments with especially strong demands from medical, defense and industrial markets.
What are the available structures for flexible circuit boards?
There are numerous, different structures available. The more common ones are defined below:
Single sided flex (IPC-6013 type 1) Coverlay (polyimide + adhesive) bonded onto an adhesiveless single sided FPC core. With or without stiffeners.
Double sided flex (IPC-6013 type 2) Coverlay bonded onto both sided of an adhesiveless double-sided FPC core (two conductive layers) with plated through holes. With or without stiffeners.
Multilayer flex (IPC-6013 type 3) Coverlay bonded on both sides of an adhesiveless construction containing three or more conductive layers with plated through holes. With or without stiffener.
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FPC/ Rigid-flex PCB Manufacturing Capability | ||
Feature | Standard | Advanced |
Layer count | 16L | HDI 2 step |
Material Type | General flex, LCP, Panasoinc, Dupont, Shengyi, Taiflex | |
Board thickness | 0.04-2.0mm | |
Board thickness tolerance | ±0.05mm | |
Max size | 480*1200mm | |
Outline tolerance | ±0.05mm | |
Dielectric layer thinckness | 0.013-0.15mm | |
Outlayer copper thickness | 18-280um | |
Innerlayer copper thickness | 18-105um | |
Min line width/ space | 0.05mm | |
Finished hole size | 0.1-6.35mm | 0.05-6.35mm |
Hole tolerance | ±0.05mm | |
Hole position tolerance | ±0.05mm | |
Plugged hole size | 0.25-0.60mm | |
Thickness aperture ratio | 8:01 | |
Min. solder mask dam | 0.075mm | |
Min. solder mask isolation ring | 0.05mm | |
Coverlay | yellow, black, white, red | Others |
PI thickness | 12.5-25um | |
AD thickness | 15-50um | |
Stiffener | PI: 0.05-0.25MM, FR4, Al, copper | |
Impedance Tolerance | ±10% | |
Surface treatment | ENIG, immersion silver, OSP, gold finger | HAL, LF HAL |