Rigid-Flex PCB

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Rigid-Flex PCB:

Rigid-Flex printed circuit boards are designed to provide solutions, and act as replacements for rigid PCBs. As the

name suggests, these circuit boards are a hybrid of flex and rigid circuits. The advantage of this type is that they

exhibit the benefits of both rigid as well as flexible circuit boards.Most rigid-flex circuit boards consist of multiple

layers of flexible circuit substrates attached to rigid boards externally and/or internally. The flexible substrates

are designed to be in a constant state of flex, and are usually formed in a flexed curve during manufacturing or

installation. This is dependent upon the design of the application

The designing of this board is a little bit difficult compared to a rigid circuit board because this module is designed

according to a three-dimensional environment that also provides high spatial efficiency.

The main benefit of this board is that it provides highly flexible, decreases flex thickness and less expensive circuit

board.

As on the tradition printed circuit board we can assemble large no of components on any side of a rigid circuit

board.

Since the incorporation that exits among rigid and flex circuitry, a rigid-flex assembly does not use connectors

among the units. In its place, the flex circuitry electrically joins the scheme together.

Each rigid-flex printed circuit board divided into different parts that have different categories of layers and quantity.

The number of layers can be larger than the flexible portion and construction substance can be

FR4 (Flame Retardant) or polyimide.

No.	Item	Description		Data and Model

1	FPC Main material	Brand	taiflex、graceth）、SY

2	PCB Material	Brand	SY、ITEQ、KB

3	Texture	Texture Brand	PI、 PET

4	Cover Film	Brand	taiflex、graceth、SY

5	Max Layers	LAYER	1-56layers（sample）、1-48layers(manufacture）

6	Finish Board thickness	mm	0.25-6.0mm(samplel） Rigid – Flex PCB 0.25-6.0mm

7	Min Pattern Width / Spacing	mm	0.05mm/0.05mm

8	Max finish board size	mm	*230450mm**

9	Finish Board thickness tolerance	mm	±50.05mm

10	PP Thickness	um	12.5um 、 25um 、 50um

11	Copper thickness	um	12um 、 18um 、 36um 、 70um

12	Stiffener materail	Variety	FR4/PI/PET/SUS/PSA

13	Surface treatment	Variety	ENIG、Immersion tin、OSP、immersion silver、plating gold

14	Min hole size	mm	Mechanical Hole ：0.15mm 、Laser Hole0.1mm

15	Hole tolerance	mm	NPTH:±0.05mm 、PTH:±0.075mm

16	Cover film color	Variety	Yellow 、 Black

17	PI thickness	mil	0.5mil、0.7mil、0.8mil、1mil、2mil

18	Max number of layers of FPCB		1-8layers

19	Min finished size	mm	*5mm8mm**

					1/2

20	Min pad	mm	inner layer（5mil）、outer layer（4mil）

21	Stiffener min size	mm	4mm×5mm

22	Stiffener max size	mm	32mm×32mm

23	Stifferner alignment accuracy	mm	±0.075mm

24	Cover minimum openning size	mm	0.6×0.6mm(steeling tooling)、0.5×0.5mm(Precision tooling)

25	Minimum openning spacing for covering film	mm	0.5mm(Precision tooling)、0.2mm（Laser Routing）、
25	Minimum openning spacing for covering film	mm	0.15mm(Normal drilling)
			0.15mm(Normal drilling)

26	Coating film overflow amount（unilateral）	mm	Normal0.08-0.12mm 、 Limitation0.03mm

27	Min diameter of gold finger semicircle hole	mm	0.25mm，Normal value0.3mm

28	Rigid-Flex PCB：Peel-off strength	N	1.4N

29	Rigid-Flex PCB：Planeness	um	Less than 15um before baking; less than 30um after baking

30	Rigid-Flex PCB：thermal shock	℃	288℃（3 times within 10 seconds）

31	Rigid-Flex PCB：W/B gold wire pull	g	> 6g
	strength
32	Rigid-Flex PCB：min.board thickness	mm	FPCB 0.1mm、4Layers 0.3mm、6Layers 0.5mm、8Layers 0.6mm、
32	Rigid-Flex PCB：min.board thickness	mm	10Layers0.8mm
			10Layers0.8mm