Product Parameters Layers: 1~32 Board thickness: 0.1mm-7.0mm Material: FR-4，CEM-1/CEM-3，PI，High Tg，Rogers Max panel size: 32'×48'(800mm×1200mm) Min hole size: 0.075mm Min line width: 3mil(0.075mm) Surface finish: OSP，HASL，Imm Gold/Nickel/Ag， Electric gold Copper thickness: 0.5-7.0OZ Soldermask: Green/Yellow/Black/White/Red/Blue Silkscreen: Red/Yellow/Black/White Min PAD: 5mil(0.13mm) Inter package: Vacuum Outer package: Carton Outline tolerance: ±0.75mm Hole tolerance: PTH：±0.05 NPTH：±0.025 Certificate: UL，ISO 9001，ISO14001，IATF16949 Special request: Blind hole+Gold finger + BGA Material Suppilers: Shengyi, KB, Nanya, ITEQ,etc. 1. General Introduction of Multilayer PCB : As the name suggests, a multi-layer circuit board can only be called a multi-layer circuit board with more than two layers, such as four layers, six layers, eight layers, and so on. Of course, some designs are three-layer or five-layer circuit, also called multi-layer PCB circuit board. Conductive wiring diagram larger than the two-layer board. The insulating substrate is separated between the layers. After each layer of the circuit is printed, each layer of the circuit is overlapped by pressing. After drilling, the electrical connection between them is usually achieved through plated through holes on the cross section of the circuit board. PCB Manufacturing Services As one of the leading Printed Circuit Board manufacturers based in China, Ucreate has been offering international companies of all sizes with high-quality PCB prototype to production services at a fair price for eight years. To make professional and advanced circuit boards, we're committed to adhering to the strictest standards during the PCB manufacturing process. We're fully compliant with the ISO 9001:2008 quality management system. 2. One-stop Service Include: PCB Prototype Quick Turn PCB Single-Sided PCB Double-Sided PCB Multilayer PCB Rigid PCB Flexible PCB Rigid-Flex PCB LED PCB Aluminum PCB Metal Core PCB Thick Copper PCB HDI PCB BGA PCB High TG PCB PCB Stencil Impedance Control PCB PCB Assembly High-Frequency PCB Bluetooth Circuit Board Automotive PCB USB Circuit Board Halogen-Free PCB Antenna PCB