What is a Double sided Rigid PCB?
A Double sided Rigid PCB is a printed circuit board (PCB) that uses plated through-holes (PTHs) to achieve electrical interconnections on an FR-4 rigid PCB substrate with copper cladding on both sides. It is also commonly referred to as:
- Double Layer Rigid PCB
- Two-Layer Rigid PCB
- 2 Layer Rigid PCB
Compared to a Single Layer Rigid PCB or 1 Layer Rigid PCB, it offers greater routing freedom and enhanced electrical performance. Compared to multi-layer PCBs, it provides advantages in cost and process complexity, making it particularly suitable for medium-complexity circuit designs.
Core Structure and Material Advantages
- Double-sided copper: Standard copper thickness is 1oz, which can be increased based on current-carrying requirements.
- Plated Through Hole (PTH): Enables electrical interconnection between the upper and lower layers and is the core process for double-sided PCBs.
- Solder mask and silkscreen: Protects traces, prevents short circuits, and marks component designations and polarity.
- FR-4 rigid PCB base material: Offers excellent insulation, heat resistance, and mechanical strength, suitable for operating environments from -40°C to 125°C. Its stable dielectric constant and good thermal performance make it ideal for most general-purpose electronic products.
Key Manufacturing Process Points (Rigid Double sided Rigid PCBs)
- Panel cutting: Using 41×49-inch FR-4 large panels, cut to the required thickness (common thicknesses: 1.0 mm, 1.6 mm, 2.0 mm).
- Drilling: Precise positioning ensures alignment between through-holes and pads; deburring after drilling prevents uneven copper plating.
- Copper plating: Depositing copper on the hole walls creates a stable conductive path between the upper and lower layers; hole wall quality directly affects reliability.
- Image transfer and etching: Circuit patterns are transferred using dry film and film; excess copper is etched away to preserve the circuitry.
- Solder mask and legend printing: The solder mask protects the copper surface and prevents solder bridges; the legend marks component identifiers, polarity, and other details.
- Surface finish: Common finishes include HASL, ENIG, and OSP; selection depends on soldering process, storage time, and cost considerations.
Why choose Double sided Rigid PCBs?
|
Advantage |
Description |
|
Cost advantage |
No lamination or inner-layer fabrication as in multilayer boards, reducing manufacturing costs by 30%–50%, ideal for volume budget control. |
|
Mature process |
Eliminates complex steps, shortens production cycles by 20%–30%, with typical delivery in 7–10 days for standard orders. |
|
Flexible design |
Upper and lower layers can be routed alternately, reducing wire crossing and signal loss. |
|
Easy installation |
Rigid structure supports screw fastening and enclosure mounting without additional flexible design. |
|
Easy maintenance |
Straightforward structure allows for easier inspection and repair, suitable for engineering validation and post-production servicing. |
Application Scenarios
- Consumer electronics: TV motherboards, game consoles, printer control boards, home appliance control modules
- Automotive electronics: Window control modules, engine management systems, sensor interface boards
- Industrial control: PLC control boards, robot driver boards, sensor acquisition modules
- Power supply: LED driver boards, power supplies, relay circuits
- Medical equipment: Portable testers, patient monitor boar
In these fields, 2 Layer Rigid PCBs combine stable performance with cost advantages, making them a preferred solution for engineers.
Our Manufacturing and Service Advantages
- High-precision manufacturing: Dimensional tolerance ≤±0.1 mm, ensuring assembly accuracy.
- Stable process flow: Precision drilling and copper plating ensure reliable connections between layers, preventing cracking.
- Quality assurance: Automated Optical Inspection (AOI) and through-hole continuity testing ensure every board works the first time.
- Flexible capacity: Supports both small-batch prototyping and large-scale production, meeting project needs at different stages.
- Full-process service: From DFM review to packaging and delivery, reducing communication costs and improving delivery efficiency.
Unlock more of STHL's services.
Start by sending us your requirements at info@pcba-china.com.
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