Flexible Printed Circuit FPC on Polyimide with 90ohm Impedance Controlled
(Flexible printed circuits are custom-made products, the picture and parameters shown are just for reference)

General description
This is a type of flexible PCB built on polyimide 76 micron substrate with 90 ohm impedance controlled on 0.15mm/0.3mm track and gap for the application of USB Connector. It's standard 0.20 mm thick with yellow solder mask (coverlay) on both sides and immersion gold are on pads. FR-4 as stiffener is on the head and tail. The base material is used from Shengyi, entire board supplying 1 up flex per panel. They're fabricated per IPC 6012 Class 2 using supplied Gerber data. Each 25 pieces are packed for shipment.



Parameter and data sheet

Features and benefits
Excellent flexibility;
Reducing the volume;
Weight reduction;
Consistency of assembly;
Increased reliability;
Powerful PCB capabilities support your research and development, sales and marketing;
Delivery on time with higher than 98% on-time-delivery rate;
Team with passion, discipline, responsibility and honesty;
No minimum order quantity. 1 piece is available;

Applications
Flexible flat cable, Industrial control temperature controller soft board, medical equipment controller, automobile GPS navigation flex board, tablet keypad flex board, display backlight

1.5 Single ended (line) impedance, Differential impedance
Definition of Characteristic Impedance
At a certain frequency, relative to a reference layer, the resistance of its high-frequency signals or electromagnetic waves in the process of transmission is called the characteristic impedance, which is the vector summation of electrical impedance, inductive reactance, capacitance resistance.

The classification of characteristic impedance
Common characteristic impedance is divided into: (1) Single ended (line) impedance; (2) Differential impedance and (3) coplanar impedance, etc.

Single ended impedance refers to the measured impedance of a single signal line. Differential impedance refers to the impedance measured between the two transmission lines with equivalent width and spacing in differential drive. Coplanar impedance refers to the impedance measured when the signal line is transmitting between its surrounding GND / VCC (the space between the signal line to GND / VCC on both sides is equal).



The Determinant Condition Required for Impedance Control
When the signal is transmitted in the PCB conductor, if the length of conductor is close to the 1/7 of the signal wavelength, then the conductor at this time becomes a signal transmission line, the other general signal transmission lines are required to be done with impedance control. Whether it is required to control the impedance in PCB production is based on the customer's requirement, if the customer requires that a certain line width need to be done with impedance control, it is required to control the impedance of the line width in production.Three basic elements of impedance match are the output impedance (the original active parts), the characteristic impedance (signal line), the input impedance (passive parts) (PCB board)

More Impedance Controlled Flexible Circuit (FPC)

Bicheng PCB is headquartered in Shenzhen, a city with great economic vitality. Based in China, we adhere to the philosophy of servicing small and medium sized companies offering variety of circuit boards to meet the demands of market.

We maintain the highest standards which support products that exhibit exceptional quality, performance and reliability. The circuit board ranges from conventional FR-4 to PTFE, metal core to flexible circuits which are used in the industries of home appliances, portable and consumable electronics, medical filed, aerospace as well as telecommunications etc.

Main material partners