Rigid-flex Circuits & Rigid-flex PCB

Rigid-flex Circuits / Rigid-flex PCB Stackup

This is Multi-stackup, that is, at different positions on the substrate, its thickness and stacked structure are different, as shown in 6 layer rigid-flex circuit board stackup below. The thicker stackup is usually applied to the rigid substrate portion, while the stackup on the flexible circuit portion will be thinner and suitable for bending and folding.

With the bending and folding capabilities of rigid-flex boards in tight spaces, Rigid-flex printed circuit boards are widely used in military and avionics manufacturing. When designing a rigid-flex board, expand the minimum ring hole on the flexible layer plated via hole, and ensure that all line-to-pad and line-to-trace nodes added the teardrops to meet the multi-layer Rigid-flex circuit technology. Beton Technology can manufacture multilayer Rigid-flex circuit board and HDI Rigid-flex circuit board.

Rigid-flex circuits support connecting external blind via PCB layers to one or more inner layers without passing through the entire board; buried vias connect one or more inner layers without passing through the outer layers. Rigid-flex PCBs require a lower number of interconnects and related components. It helps simplify assembly operations, making rigid-flex PCBs easier to assemble and test. Rigid-flex PCB is very suitable for PCB prototyping.

1+1+1 Rigid-flex PCB Stackup

1+2+1 Rigid-flex PCB Stackup

2+2 Rigid-flex PCB Stackup

1+1 Rigid-flex PCB Stackup

1+2 Rigid-flex PCB Stackup

2+1 Rigid-flex PCB Stackup

2+2+2 Rigid-flex PCB Stackup

1+4+1 Rigid-flex PCB Stackup

3+2+3 Rigid-flex PCB Stackup

Rigid-flex Circuits (PCB) Advantages

1. Small size, flexible shape, the compact shape of the rigid-flex PCB makes it the best choice for thin lines and high-density circuits in HDI technology.

2. Can be customized for different applications, can be customized for applications in many industries such as aerospace, military, medical equipment and consumer electronics.

3. Better mechanical stability, the stability of the rigid board and the flexibility of the flexible board form a stable structure for the entire package

4. Better performance in harsh environments, rigid-flex PCBs have high resistance to shock and high vibration, so they can work normally in high-stress environments.

5. Ease of fabrication and testing

6. High circuit density, good heat dissipation and chemical resistance

Rigid-flex Circuits Capabilities

Item	Capabilities
Rigid-Flex PCB Layer	2-30 layers
Base Material	PI (12.5um, 25um, 50um, 75um,100um), FR4 TG 130, 150, 170, 180 (0.05mm-3.2mm)
Stiffeners Material	PI, FR4, stainless steel, aluminum
EMI Shielding Film	HCF-6000G,PC800
Board Thickness	0.4mm ~ 6.0mm
Copper Thickness	HOZ 1OZ 2OZ 3OZ 4OZ 6OZ 10OZ
Solder Mask Color	Green, White, Black, Red, Blue, Yellow
Coverlay Color	Black, White, Amber, Yellow
Surface Finish	HASL, ENIG, Immersion Nickel Palladium Gold, Gold Finger, Gold Plating, Tin Plating ,Immersion Silver, Immersion Tin, OSP
Minimum aperture	0.10mil/3mil
Line width and line space	0.10mil/3mil
Impedance Tolerance	±10％
Conduction Test Impedance	≤50Ω
Impedance Controlling	50 Ohm, 90 Ohm, 100 Ohm, 110 Ohm and other value
PTH Tolerance	0.075mm
Minimum drilling size	0.10mm
Blind/Buried Vias	Yes(HDI Technology)
Minimum vias Pad Size	0.3mm
Minimum Annular Ring Size	0.1mm
Excessive Glue	≤0.15 mm
Quality Grade	Standard IPC 2, or your need
Build Time	2days - 5weeks

Rigid-flex Circuits manufacturing Processing

The rigid-flex board is a new type of printed circuit board that combines the stability of a rigid PCB and a flexible FPC. It has strong resistance to harsh application environments and a strong signal transmission path, but its manufacturing process is also more complex than normal circuit boards.

Rigid-flex PCB