Low Reflection Black Solder Mask Aluminum Substrate PCB is a metal core circuit board with a matte black mask surface designed to minimize stray light and unwanted reflections. Built on a rigid aluminum base for efficient heat dissipation, this PCB is ideal for optical, camera and LED lighting applications where low light reflection is required.
1. Specifications
- Board Type: Aluminum Metal Core PCB (MCPCB), black solder mask
- Base Material: Aluminum alloy 1060 / 5052
- Dielectric Layer: Thermally conductive insulation layer, 75μm – 150μm
- Copper Foil: 1oz (35μm) / 2oz (70μm)
- Board Thickness: 1.0mm / 1.5mm / 2.0mm
- Thermal Conductivity: 1.0 W/m·K / 1.5 W/m·K / 2.0 W/m·K optional
- Solder Mask: Matte / Glossy black LPI solder mask, UL94 V-0
- Surface Finish: HASL-LF / ENIG / OSP
- Minimum Trace / Space: 0.15mm / 0.20mm
- Emissivity: Low light reflection surface, optimized for optical systems
- Breakdown Voltage: ≥2500V AC
- Insulation Resistance: ≥1000 MΩ
- Maximum Operating Temperature: 130°C
- Certification: UL, RoHS ，REACH
- Quality Test: 100% open/short test + insulation resistance verification
2. Performance Characteristics
- Low light reflection: matte black solder mask surface minimizes stray light and reflection, critical for optical imaging and sensor applications
- Good heat dissipation: aluminum base efficiently conducts heat away from LED and power components, maintaining stable operating temperatures
- High contrast visibility: black background makes white silkscreen markings and copper pads highly visible for assembly and inspection
- Reliable electrical insulation: dielectric layer prevents short circuit between copper traces and aluminum base
- Anti-glare surface: reduces unwanted reflections in camera modules, display backlight and optical sensor systems
- Stable thermal performance: consistent thermal conductivity across the board for uniform heat spreading
- Mechanical rigidity: rigid aluminum base resists warping during reflow soldering and long-term operation
- Chemical resistance: black mask withstands flux residue and cleaning solvents without discoloration
3. Manufacturing & Process Advantages
- Matte black mask option: provides ultra-low reflection surface for optical-sensitive applications
- Tight mask thickness control: consistent surface finish across the entire panel
- Anti-yellowing black formulation: maintains deep black appearance under heat and UV exposure
- Precise pad opening: clear soldering windows with no mask residue on contact pads
- Strict insulation testing: 100% verification of dielectric integrity before shipment
- Custom outline and mounting holes: tailored to different optical module and LED fixture designs
- Panel optimization: maximizes board count per panel for cost-effective mass production
- DFM support: engineering team provides feedback on thermal layout and optical clearance design
- Fast prototype turnaround: standard MCPCB designs available in short lead time
- Consistent batch quality: controlled dielectric thickness and mask curing process
4. Typical Applications
- Camera module PCBs and optical sensor boards requiring low stray light
- LED lighting systems where glare reduction is required
- Display backlight units and illuminated signage with black aesthetic
- Infrared LED and optical sensing modules
- Automotive interior ambient lighting and instrument panel backlighting
- Machine vision and inspection equipment circuit boards
- Photographic and cinematography equipment PCBs
- Medical optical instruments and endoscope control boards
- Industrial vision systems and barcode scanner modules
