4. Minimum aperture: 0.1mm
The 4-layer flexible PCB has a minimum aperture size of 0.1 mm, ensuring precise placement of components, thereby enhancing the overall functionality and reliability of the VR smart glasses.

5. Copper thickness: 12um
Excellent electrical conductivity is crucial for data transmission in VR devices. The 4-layer flexible PCB has a copper thickness of 12um, which provides optimal signal transmission and ensures seamless interaction between the user and the virtual world.

6. Flame retardant: 94V0
When designing electronic devices, safety is paramount. The 4-layer flexible PCB has a high level of flame retardancy and meets the strict 94V0 standard, ensuring the safety and reliability of VR smart glasses.

7. Surface treatment: immersion gold
The surface treatment of the PCB plays a vital role in ensuring a reliable connection. The 4-layer flex PCB features immersion gold, a highly effective surface treatment that enhances solderability and prevents oxidation, improving performance and longevity.

8. Resistance welding color: black
With its stylish black color, the 4-layer Flex PCB blends seamlessly with the overall aesthetics of the VR smart glasses, enhancing its visual appeal.

9. Stiffness: steel shell, FR4
4-layer flexible PCB provides the perfect balance between flexibility and rigidity. It uses a steel shell and FR4 material to provide the necessary rigidity to support the numerous components while maintaining the flexibility required for VR smart glasses.
10. Application: VR smart glasses
The application of 4-layer flexible PCB in VR smart glasses is transformative. These PCBs enable seamless integration of various components to deliver immersive and engaging VR experiences to users around the world.