PCB Layer Introduction From Wonderful PCB Limited

PCB board layer analysis:

1.       Top Layer, also known as component Layer, is mainly used to place components, for than the laminates and sandwich plate can be used to wiring.

2.       Mid layer, can have up to 30, in a multilayer signal lines used for cloth.

3.       Bottom layer, also known as the welding layer, mainly used for wiring and welding, sometimes also can be placed components.

4.       Top overlayer, Projection of the contour is used to indicate components, components of symbols, nominal value or model and various kinds of comment character.

5.       Bottom overlayer, Same as the top silk layer effect, if various annotation on top silkscreen layer contain, so don't need to be at the bottom screen printing layer

6.       Internal planes, it is mainly used as the signal wiring layer, Protel DXP contains 16 internal layer

7.       Mechanical layers

8.       Solder mask layer, there are top solder mask and bottom solder mask. It is Protel PCB corresponds to the welding plate and the hole in the PCB file data automatically generated plate layer, laying resistance welding is mainly used in the paint. The board layer adopts negative film output, plate layer displayed on the bonding pad and a hole part represents not solder resist paint shop area on a circuit board, which is for welding parts.

9.       Past mask layer, there are top past mask and bottom past mask. When it is welding furnace used to correspond to the SMD components of solder joints, is also a negative form of output. Board layer to display on some representative circuit boards welding plate and the hole are not spread the area of solder paste, is can't to welding parts.

10.   Keep-out layer, it is mainly used for electrical drawing PCB border

11.   Multilayer, it is mainly used for layout multilayer circuits

12.   NC drill

13.   Drill drawing, it is used for setting drill profile.

Wonderful PCB circuit board factory production circuit board used in all kinds of electronic products, PCB type can be divided into: gold-plated board, heavy gold plate, tin plate. OSP antioxidant plate, tin plate, gold finger plate, plate, carbon oil LanJiao plate, high-frequency boards, aluminum circuit boards, etc. Products are widely used in computers, communication products, household electrical appliances. Product sales throughout the country China, receive the praise of users, welcome to inquire, to choose.