What are the requirements regarding the spacing of printed circuit board wires?

On the printed circuit board wire spacing requirements? jiubao think, adjacent wire spacing must be able to meet the electrical safety requirements, and in order to facilitate the operation and production, the spacing should be as wide as possible. The minimum spacing should at least be suitable for the voltage to be withstood. This voltage generally includes operating voltage, additional fluctuation voltage and peak voltage caused by other reasons. If the relevant technical conditions allow the presence of some degree of metal residue between the wires, the spacing will be reduced. Therefore the designer should take this factor into account when considering voltage. In the wiring density is low, the spacing of the signal line can be appropriately increased, the high and low levels of the signal line should be as short as possible and increase the spacing.

The minimum width of the printed circuit board wires is mainly determined by the adhesion strength between the wires and the insulating base wrench and the value of the current flowing through them. When the copper foil thickness of 0.05mm, width of 1-1.5mm. Through the 2A current, the temperature will not be higher than 3 ℃, the wire width of 1.5mm can meet the requirements. For integrated circuits, especially digital circuits, usually choose 0.02-0.3mm wire width. Of course, as long as allowed, or as wide as possible. Especially for power and ground lines, the minimum spacing of the wires is mainly determined by the worst-case insulation resistance between the wires and breakdown voltage. For integrated circuits, especially digital circuits, as long as the process allows, the wire can make the pitch as small as 5-8mm.

But for large currents, if the current load to 20A / square millimeter calculation, when the thickness of the copper-clad foil for 0.5MM, (generally so much,) then 1MM (about 40MIL) line width of the current load of 1A, therefore, the line width of 1-2.54MM (40-100MIL) to meet the general requirements of the application of high-power equipment on the board of the ground and the power supply, according to the size of the power, can be appropriately increased line width, while in the small power digital circuits, in order to improve the wiring density can be met by taking a minimum line width of 0.254-1.27MM (10-15MIL). Appropriate increase in line width, while in the small power digital circuit, in order to improve the wiring density, the minimum line width of 0.254-1.27MM (10-15MIL) can meet.

In the printed circuit board at the same time there are high-voltage circuits and low-voltage circuits, high-voltage circuits part of the components and low-voltage parts to be separated from the open position, the isolation distance and to withstand the withstand voltage related to the usual situation in 2000V when the board to distance 20mm, in this case above the proportion of the calculations have to be increased, for example, if you want to withstand the 3,000V withstand voltage test, then the distance between the high and low-voltage circuits should be in the more than 35mm, many In many cases to avoid creepage, but also in the printed circuit board between high and low voltage slot. The circuit boards we make also have high and low voltage circuits, and the distance between high and low voltage circuits is 10mm.

Shenzhen jiubao technology Co., Ltd, thirteen years focus on high precision multilayer circuit boards, single and double-sided circuit boards, special circuit boards R & D and production, with national certification qualification, is a collection of R & D, production and sales as one of the high-tech enterprises, if you are interested in our printed circuit board wires, please contact us: +86-755-29717836