8 layers of Black Oil Sinking Gold Thick Copper Plate PCB

An 8-layer black solder mask immersion gold PCB is a high-density integrated circuit board composed of 8 copper circuit layers separated by insulating prepreg, bonded via high-temperature and high-pressure lamination. Its surface is coated with a black solder mask layer to protect copper traces from oxidation and corrosion, while the immersion gold finish ensures excellent solderability, electrical conductivity and anti-tarnish performance. Vias (through, blind, buried) realize reliable interlayer connections.

Core Advantages of Black Solder Mask Immersion Gold Multilayer PCBs vs. Conventional PCBs

Standardized Requirements for the Customization of Multi-layer PCB

Send us your:
1. Gerber files (RS-274X)
2. BOM (if PCBA needed)
3. Impedance requirements & stack-up (if available)
4.Test requirements (TDR, network analyzer, etc.)

Tip:Normally,Gerber files includes: PCB type,thickness, ink color, surface treatment process, and if SMT processing is required, you can provide a component BOM and reference designation diagram, etc.

We’ll reply within 24 hours with a free quote, DFM report, and material recommendation.

Production Process of Black Solder Mask Immersion Gold Multilayer PCBs
1. Fabricate inner circuit layers, inspect defects via AOI, then stack and laminate with prepreg under high temperature and pressure.
2. Drill through/blind/buried vias, plate copper on via walls and surfaces to ensure interlayer conductivity.
3. Transfer and etch outer circuit patterns, then apply black solder mask and cure it.
4. Perform immersion gold finish on pad areas to enhance solderability and corrosion resistance.
5. Conduct electrical testing (e.g., flying probe test) and shape cutting before final quality inspection.

Factory showcase

PCB Quality Testing

Certificates and Honors

Dongguan Xingqiang Circuit Board Co., Ltd. was established in 1995 and is a professional circuit boardfactory that manufactures single-sided and double-sided PCBs, multi-layer PCBs, and Rigid Flex PCBs.

As a professional supplier of customized boards, we work closely with our clients, leveraging our strengths in processes and technologies based on their design files to create high-performance, high-quality customized boards that support their product innovation and upgrades.Our company has two production bases in Dongguan andJiangxi, covering an area of 205000 square meters with a comprehensive monthly production capacity of 200000 square meters. The company's products are widely used in computer peripherals, communication, power supply, medical, automotive electronics, household appliances and other fields.

Our company advocate integrity, win-win and pioneering business philosophy, and put into practice the work style of "pragmatism, hard work and responsibility" to create a good corporate environment. Based on a new management model, advanced technology and equipment and good product quality, We always adhere to the corporate spirit of customer first and people-oriented.