Home > Flexible Circuits > FR-4 Stiffener Flexible Printed Circuits (FPC) for Enhanced Durability and Flexibility
FR-4 Stiffener Flexible Printed Circuits (FPC) for Enhanced Durability and Flexibility

(Printed Circuit Boards are custom-made products, the picture and parameters shown are just for reference)


Product Overview

Our FR-4 Stiffener Flexible Printed Circuits (FPC) are custom-made solutions tailored for surveillance systems and other precision applications. This single-layer FPC, with a thickness of 0.15mm, is constructed using Shengyi base laminate and adheres to IPC 6012 Class 2 standards. The design incorporates FR-4 stiffeners on the tails and polyimide stiffeners on the inserting heads, ensuring optimal support and flexibility.


Key Features and Benefits

1.Excellent Flexibility: Designed to bend and flex without compromising performance.
2.Weight and Volume Reduction: Ideal for compact and lightweight applications.
3.Assembly Consistency: Ensures uniform assembly processes.
4.Increased Reliability: Durable construction for long-term use.
5.Cost-Effective: Affordable solutions with no minimum order quantity.
6.Efficient Processing: Seamless continuity in manufacturing.



Parameter and Data Sheet

Click to expand/collapse the table
Size of Flexible PCB 230.5 X 30.8mm
Number of Layers 1
Board Type Flexible PCB
Board Thickness 0.15mm 
Board Material Polyimide (PI) 25µm
Board Material Supplier ITEQ
Tg Value of Board Material  60℃
PTH Cu thickness ≥20 µm
Inner Iayer Cu thicknes N/A
Surface Cu thickness  35µm (1oz)
Coverlay Colour Yellow
Number of Coverlay 2
Thickness of Coverlay 25 µm
Stiffener Material Polyimide
Stiffener Thickness 0.2mm
Type of Silkscreen Ink IJR-4000 MW300
Supplier of Silkscreen TAIYO
Color of Silkscreen White
Number of Silkscreen 1
Peeling test of Coverlay No peelable
Legend Adhesion 3M 90℃ No peeling after Min. 3 times test
Surface Finish Immersion Gold
Thickness of Nickle/Gold Au: 0.03µm(Min.); Ni 2-4µm
RoHS Required Yes
Famability 94-V0
Thermal Shock Test Pass, -25℃±125℃, 1000 cycles. 
Thermal Stress Pass, 300±5℃,10 seconds, 3 cycles. No delamination, no blistering.
Function  100% Pass electrical test
Workmanship Compliance with IPC-A-600H & IPC-6013C Class 2


Applications

Our FR-4 Stiffener FPCs are widely used in:

Mobile phone built-in antennas
Mobile phone battery flex boards
Industrial surveying and mapping instruments



Understanding Stiffeners in Flexible PCBs

In applications requiring soldered components, flexible circuit boards often need external stiffeners for added support. Common stiffener materials include:

1.PI or Polyester Film: Thickness: 125μm (5mil)
Provides moderate hardness and flexibility.
2.Glass Fibers (FR-4): Thickness range: 125μm (5mil) to 3.175mm (125mils)
Offers higher hardness for demanding applications.
3.Polymer Materials: ow water absorption with high pressure and temperature resistance.
4.Steel Foil and Aluminum Shim: High hardness and excellent heat dissipation properties.


Why Choose Our FR-4 Stiffener FPCs?

Our FR-4 Stiffener Flexible Printed Circuits are engineered to meet the highest industry standards, offering unmatched flexibility, durability, and cost efficiency. Whether you need a prototype or large-scale production, we provide customized solutions to fit your requirements.





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