Impedance Controlled Flexible Printed Circuit (FPC) on Polyimide
(Printed Circuit Boards are custom-made products, the picture and parameters shown are just for reference)
General Description
This flexible prined circuit (FPC) is built on a 76-micron polyimide substrate with 90-ohm impedance control, specifically designed for USB connector applications. The FPC has a standard thickness of 0.20 mm and features a yellow solder mask (coverlay) on both sides, with immersion gold plating on the pads. To provide additional support, FR-4 stiffeners are incorporated at the head and tail of the circuit. The base material is sourced from Shengyi, and the entire board is supplied as 1-up flex per panel. Fabrication adheres to IPC 6012 Class 2 standards using supplied Gerber data. Each shipment contains 25 pieces.
Parameter and data sheet
| PCB Size: | 196 X 35mm = 1 PCS |
| Number of Layers | 2 layers |
| Board Type | Flexbile PCB |
| Board Thickness | 0.2mm +/-10% |
| Stackup | TOP FR-4 Steffener 0.8mm |
| PI coverlay 0.025mm | |
| Copper top 0.035mm finish | |
| Polyimide substrate 0.076mm | |
| Copper top 0.035mm finish | |
| PI coverlay 0.025mm | |
| Board Material Supplier | Shengyi |
| Tg Value of Board Material | 60℃ |
| PTH Cu thickness | 20 um |
| Inner Iayer Cu thicknes | N/A |
| Surface Cu thickness | 35 um (1oz) |
| Coverlay Colour | Yellow |
| Number of Coverlay | 2 |
| Thickness of Coverlay | 25 um |
| Stiffener | FR-4 0.8mm |
| Type of Silkscreen Ink | N/A |
| Supplier of Silkscreen | N/A |
| Color of Silkscreen | N/A |
| Number of Silkscreen | N/A |
| Minimum via (mm) | 0.3 |
| Minimum Trace (mil) | 5.90 |
| Minimum Gap(mil) | 11.8 |
| Surface Finish | Immersion Gold |
| 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 |
| Type of artwork to be supplied | email file, Gerber RS-274-X, PCBDOC etc |
| Service area | Worldwide, Globally. |
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Features and Benefits
Excellent Flexibility: Ideal for applications requiring intricate routing and flexibility.
Volume Reduction: Optimizes space in compact designs.
Weight Reduction: Lightweight materials enhance overall product efficiency.
Consistency of Assembly: Ensures uniform manufacturing and assembly processes.
Increased Reliability: Designed for high-performance applications with robust construction.
Powerful PCB Capabilities: Supports research, development, sales, and marketing needs.
On-Time Delivery: Maintains a delivery rate higher than 98%.
No Minimum Order Quantity: Available for orders as low as one piece.
Applications
Our impedance-controlled FPCs are suitable for various applications, including:
Flexible flat cables
Industrial control temperature controllers
Medical equipment controllers
Automobile GPS navigation flex boards
Tablet keypad flex boards
Display backlights
Characteristic Impedance
Definition: Characteristic impedance refers to the resistance of high-frequency signals or electromagnetic waves during transmission relative to a reference layer. It is the vector summation of electrical impedance, inductive reactance, and capacitance resistance.
Classification:
1.Single-ended (Line) Impedance: Measured impedance of a single signal line.
2.Differential Impedance: Measured impedance between two transmission lines with equivalent width and spacing.
3.Coplanar Impedance: Measured impedance with signal lines transmitting between surrounding GND/VCC.
Determinant Conditions for Impedance Control
When signal transmission occurs in the PCB conductor, if the conductor length approaches 1/7 of the signal wavelength, it acts as a signal transmission line. Impedance control is necessary based on customer requirements, particularly for specific line widths.
Explore our range of impedance-controlled flexible circuits tailored for high-performance applications. For more information or to discuss your specific needs, please contact us!