Topfast is a professional PCB assembly service provider offering a full range of services from component procurement, SMT placement, DIP post-soldering, to testing and assembly. We have advanced SMT production lines and a rigorous quality inspection system, supporting small to large-scale production runs to help customers shorten time to market and reduce supply chain risks.

In today’s rapidly developing electronics industry, finding a reliable PCB prototype manufacturer is crucial. Topfast is a one-stop PCB solutions expert with 17 years of experience, providing comprehensive services from design to assembly, with reliable quality and highly competitive prices.

PCB layer selection involves analyzing key factors such as circuit complexity, frequency requirements, cost constraints, and signal integrity. Practical selection methods include pin density calculations and BGA adaptation rules, while also exploring advanced technologies such as HDI (high-density interconnect) and stacking optimization.

In PCB design, the choice between 2-layer and 4-layer boards directly impacts product performance and cost. 2-layer boards offer the advantages of a simple structure and low cost (saving 30% in costs, 48-hour quick prototyping), making them an ideal choice for simple circuits (such as home appliance control boards). Meanwhile, 4-layer boards utilize specialized layer stacking designs (signal-ground-power-signal structure) to deliver exceptional signal integrity and EMC performance for high-frequency applications (increasing transmission distance by 15%) and complex circuits (reducing signal interference by 50%).