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6 Layer Rigid Flex Circuit Boards,
1.6 MM Rigid Flex Circuit Boards,
FR4 Flex PCB
Rigid Flex Printed Circuit Board 6 Layer 1.6 MM Board Thickness
1 Rigid flexible pcb, FR4 and polymide material laminated together.
2 10 Layer pcb, L1-L2 and L5-L6 are rigid layers. L3-L4 are flexible layers.
3 Finished pcb board size is 1.6mm.
4 Copper thickness is 1/1/1/1 OZ.
5 Min hole size is 0.3mm.
6 Min line space and width is 36/6mil.
7 Surface treatment is immersion gold 2u'.
8 The production cost will be higher than normal multilayer pcb and lead time will also be longer.
9 Min BGA size is 12mil.
Q1:What is a Rigid-Flex PCB?
A1: A Rigid-Flex PCB is a hybrid board that consists of a combination of rigid and flexible printed circuit boards. These boards are designed by combining flexible circuit boards with one or more rigid boards.
The flexible part of the board is usually used for providing interconnections between rigid boards, which allows narrow conductor lines which take up less space making the boards smaller. Using flexible PCBs for interconnections also eliminates the need for connectors, which are bulky and heavy making rigid-flex printed circuit boards much lighter. Interconnections using flexible PCBs over connectors also provide lower losses and accommodate controlled impedance and eliminate connection problems such as cold joints.
Another major advantage of Rigid-Flex boards is the use of different substrate materials in different sections on the board. Some sections of the board might require high performance substrates which are expensive while others sections might not could use a standard FR-4 substrate. This flexibility in terms of substrate selection can optimize the performance and cost of Rigid-Flex PCBs.
Designers often use Rigid-Flex PCBs as they provide a lot of design flexibility. These boards are also more cost effective than flexible PCB boards.
Q2: What are Flexible Printed Circuit Boards?
A2:A Flexible Printed Circuit Board (PCB) is a board that can be bent to conform to a desired shape during its application. The board can be bent or twisted without damaging the circuit. The substrate material used to build the PCB is responsible for its flexibility. Polyamide, PEEK (Polyether ether ketone) or a transparent conductive polyester film are common substrates used to make flexible PCBs.
The layers of a Flex PCB are more or less the same as a Rigid PCB, with the addition of an overlay, or coverlay i.e. a lamination process used to encapsulate and protect the external circuitry of a flex circuit. This is similar to the solder mask layer in a rigid PCB. The coverlay film is a polyimide film which is coated with a thermoset adhesive. It protects the flexible circuit from damage. The coverlay is optional, but most flexible PCBs do use this.
The fabrication of flexible PCBs does cost more than rigid PCBs, however they have a number of advantages in certain applications and thus the cost can be justified. For example, they can replace bulky wiring in Satellites where space and weight are the main constraints for the designers. They are also in LED Strips, consumer electronics and a number of other applications.
Other advantages of flexible Printed circuit boards are that they are lighter than rigid boards and have improved resistance to vibrations and movement so are often used in transportation applications.