Technical Challenges:

1. Multiple Lamination Cycles: Ensuring both lamination quality and alignment accuracy is critical. Specifically, during the lamination process, it's a challenge to maintain dielectric uniformity and surface flatness while simultaneously achieving high alignment precision.
2. Laser Drilling: The process presents difficulties such as inconsistent drilling depth, rough hole walls, and hole deformities, all of which negatively impact subsequent plating quality and signal integrity.
3. Electroplating: There are risks of uneven plating and potential reliability issues.
4. Aggressive Lead Time: The required delivery schedule was extremely challenging.

Our Countermeasures:

1. Our Zhuhai PCB factory is positioned to specialize in high-end R&D quick-turn prototypes and small to medium-volume production. In line with this positioning, our manufacturing process for this product utilizes state-of-the-art equipment—including Orbotech LDI high-precision exposure machines, in-line AOI (Automated Optical Inspection), Orbotech AOI, and X-Ray drills—to effectively enhance alignment accuracy and guarantee production quality.
2. Our process employs a 6th generation Mitsubishi laser drill, which offers precise control over laser energy and position to ensure consistent quality for every drilled hole. Additionally, the equipment is fitted with a high-precision positioning system capable of achieving micron-level accuracy. This feature is particularly crucial for applications with stringent drilling requirements, such as HDI (High-Density Interconnect) boards.
3. In the electroplating stage, we utilize a gantry-type pulse plating process. The application of high-frequency pulse currents promotes the diffusion of ions in the plating solution. This improves the uniformity of copper thickness at the bottom of the holes to within ±10%, meeting the performance requirements of high-end PCBs.
4. For the production of this complex 30+ layer, ultra-high layer count HDI PCB, the entire cycle from customer order placement to product shipment was completed in just 2 weeks. Circuit Butler provided an expedited service for this project. Through meticulous and systematic planning and coordination, our project team successfully accomplished this highly challenging production task.