PCB is also the printed circuit board, is a more important electronic components, electronic components of the support body. There are some friends in the drawing board, do not know what PCB negative process and positive process is, the following xiaobian for you to introduce the PCB negative process and positive process.

The negative and positive PCB processes show the opposite effect of the manufacturing process.

PCB negative technology and positive technology

Positive process

The design of the feature film is generally copper-free, with copper reservation in the wiring and copper laying areas, and no copper reservation in the wiring and copper laying areas. For example, the signal layer of the top layer, bottom layer and so on is positive.

Positive process is a forward logic, error rate is relatively small, because the positive process adopts the way of adding dynamic copper, basically can meet all the design requirements, unless the board to be designed is too complex, so it is generally better to use positive to design PCB, especially the novice.

Negative process

Negative process is the opposite of positive process. Negative process has copper by default. There is no copper in the wiring and copper laying area, and there is copper reservation in the non-wiring and copper laying area. Specify if negative process is to be used.

The negative process is a little more convenient than the positive process, where you just specify where you don’t need copper, whereas the positive process requires you to draw copper in pieces.