What is the use of opening windows in PCB design? How to design?

What is the use of opening windows in PCB design? How to design?

      What is the use of opening windows in PCB design, and how do I open windows?Next, I will answer for you.ou

     Usually, the leads on the PCB are covered with oil to prevent short circuits and damage to the equipment.The so-called window is to remove the paint layer on the wire so that the wire can be exposed to tin.

     What is the use of opening windows in PCB design?

PCB design can not only realize the PCB as a plug-and-play plug-in, but also increase the thickness of the solder to achieve the purpose of excessive current

     As shown in the figure above, the window opens.It is not uncommon for PCBs to open windows, and one of the more common ones may be memory sticks.Anyone who takes apart the computer knows that there is a golden finger on the memory stick, as shown in the figure below:

      Here, cheat is the open window, plug and play.

there is also a very common function of opening windows, that is, the later iron increases the thickness of the copper foil, which facilitates excessive current, which is more common on the power supply board and the motor control board

     How to open windows in PCB design?

In PCB design, threading and windowing can be set on the TOP/BOTTOM SOLDER layer.

TOP/BOTTOM SOLDER (top/bottom solder resist green oil layer): The top/bottom solder resist green oil is applied to prevent tin on the copper foil and maintain insulation.

Solder mask green oil opening windows can be set on this layer to the pads, vias and non-electrical traces of this layer

1. In the PCB design, the soldering pad will open a window by default (OVERRIDE: 0.1016mm), that is, the soldering pad exposes the copper foil and expands by 0.1016mm, and solder is applied during the wave soldering process.It is recommended not to make any design changes to ensure weldability

 2. In the PCB design of the via hole, the window will be opened by default (OVERRIDE: 0.1016mm), that is, the via hole exposes the copper foil, expands by 0.1016mm, and is wave soldered.If the design is to prevent SOLDER from pasting on SOLDER MASK, you must select the PENTING option of SOLDER MASK to close SOLDER MASK.

3. In addition, non-electrical wiring can also be carried out separately in this layer, so that the green oil can be blocked, so that the window can be opened accordingly.

If it is on a copper foil wire, it is used to enhance the ability of the wire to overcurrent.

Tin is added during the soldering process.

If you use non-copper wire, usually used for logo and special character screen printing, you can omit it to create a character screen layer

y board and the motor control board