Multi-layer circuit boards are very important in recently electrical technology. Especially in electric equipment filed, such as computer,TV set, medical equipment and more products. Printed circuit boards (PCBs) form the basis of all electrical technology found today. They consist of an insulating substrate patterned with copper wires and other electrical components such as resistors, capacitors and LED Shower. As technology has become more complex, so has their associated PCBs, and it is common today for them to have two or more copper layers. These multi-layered boards are complex and are normally designed with computer aided design software before being sent to an external company for fabrication. Before you read this article I strong recommend you read how to make PCB board.

Design multi-layer printed circuit board. Use your PC design software package to design the board. But you should make a draft first, you should know how to design PCB . Then In the software, designs can be put into a number of "layers." These allow the separation of various components, and are needed by the printed circuit board Supplier. In layer 0, draw the board outline. The outline has to be in the dimensions expected of the final board. Any drilled holes present on the board need to be drawn into layer 1 and need to be actual size. The copper layers are placed in layers 2 and 3.

Save the PC design as a "Gerber" file. This is the industry standard for PCB manufacturing companies. The Gerber file format will separate each layer out into a different file for processing by the manufacturer.

Create a text file with the board dimensions, and the contents of each layer. For example:
Board dimensions: 60 mm x 100 mm
Layer 0: Board outline
Layer 1: Drilled holes
Layer 2: Copper layer A
Layer 3: Copper layer B

If you don’t have design tools and didn’t know how to make PCB boards ,you can ask for help online. TBS is the largest Printed Circuit Board Supplier in china, you can contact via Email. You can visit website www.10pcb.com The PCB company will normally reply to the email with some initial designs for machine processing.