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Rigid-flex PCB of S1000-2M Rigid and R-F777 Flexible

Shipped: 17th-JAN-2024

1. Rigid-flex PCB Introduction
A rigid-flex PCB is a type of PCB that combines both rigid and flexible circuitry into a single board. It consists of rigid sections and flexible sections interconnected through flexible material. This construction allows the PCB to bend or flex to fit into various form factors or conform to the shape of a specific application.

The rigid sections in a rigid-flex PCB are made of rigid substrates, typically FR-4, which provide stability and support for components. The flexible sections are made of flexible materials, such as polyimide (PI), that allow the PCB to bend or twist without breaking.

Rigid-flex PCBs offer several advantages over traditional rigid PCBs or flexible PCBs. They eliminate the need for separate rigid and flexible boards, reducing assembly and interconnect complexity. Rigid-flex PCBs also provide improved reliability, as they have fewer interconnect points and are less prone to mechanical failures or solder joint issues.

2. Features of S1000-2M (FR-4)
- Lead-free compatible FR-4.0 laminate
- Tg180℃ (DSC), UV Blocking/AOI compatible
- High heat resistance
- Lower Z-axis CTE
- Excellent through-hole reliability
- Excellent Anti-CAF performance
- Low water absorption
- Excellent mechanical processability

3. Features of R-F777 (Polyimide)
- Polyimide (PI) thickness ranging 25um, 50um and 75um
- Copper types with ED copper and RA copper, thickness ranging 12um, 18um, and 35um
- Coefficient of Thermal Expansion (CTE) ranging 18.5-19.7 ppm/K
- High Tg value of 350℃
- Soldering Resistance of 280-350℃
- Flammability of UL 94V-0

4. PCB Stackup: 4-layer rigid-flex PCB
Copper_layer_1 - 35 μm
S1000-2M Rigid - 0.565 mm (22.2mil)
SF-PC6000 Adhesive (66μm)
Copper_layer_2 (inner layer) - 18 μm
R-F777 0.075mm (75μm)
Copper_layer_3 (inner layer) - 18 μm
SF-PC6000 Adhesive (66μm)
S1000-2M Rigid - 0.565mm (22.2mil)
Copper_layer_4 - 35 μm

5. PCB Construction details:
- Board dimensions: 83.2mm x 72.82 mm=1PCS, +/- 0.15mm
- Minimum Trace/Space: 6/7 mils
- Minimum Hole Size: 0.55mm
- No Blind vias.
- Finished board thickness: 1.6mm+/-10%, flex part thickness 0.243mm +/-0.05mm
- Finished Cu weight: 1oz (1.4 mils) outer layers
- Via plating thickness: 20 μm
- Surface finish: Immersion gold
- Top Silkscreen: White
- Bottom Silkscreen: No
- Top Solder Mask: Green
- Bottom Solder Mask: Green
- Impedance control of 50 ohms with specified tracks, Application of EMI shielding film
- 100% Electrical test used prior to shipment

6. PCB Statistics:
Components: 19
Total Pads: 56
Thru Hole Pads: 35
Top SMT Pads: 21
Bottom SMT Pads: 0
Vias: 31
Nets: 6

7. Type of artwork supplied: Gerber RS-274-X

8. Accepted standard: IPC-Class-2

9. Availability: worldwide

10. Some Typical Applications:
- computer, communication, automotive electronics, and etc.

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