Issues with line width and wiring in PCB circuits

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Issues with line width and wiring in PCB circuits [Copy link]

The chip I use has 80 pins, and the ground line is 1.5mm wide. Can't it be connected directly from the pin to 1.5mm? Can I connect 0.2mm first and then make the line wider to 1.5mm? Also, if the SMD component is placed on the top layer (red line), can the bottom layer line (blue line) not be directly connected to the component pin?

qwqwqw2088

It's OK as long as the ground wire can be connected. The power line and ground wire should be as short and thick as possible. The top layer is patched, and the bottom layer is blank. You can run the wires randomly. I haven't figured this out yet.

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qwqwqw2088 posted on 2018-4-30 22:59 It's OK as long as the ground wire can be connected. The ground wire of the power line should be as short and thick as possible. The top surface is the patch, and the bottom surface is blank. You can run the wires at will. I haven't figured this out yet.

Isn't the ground wire thicker than the power line? . In other words, if you don't make holes, you can directly use the bottom surface wire to connect the top surface patch.

qwqwqw2088

DaDaDaDaDa posted on 2018-4-30 23:28 Isn't the ground wire thicker than the power wire? That is to say, if you don't make holes, you can directly use the bottom layer wire to connect the top layer patch.

If you can connect on one layer, you don't need to make holes. Try to make as few holes as possible. The ground wire and power wire should be as thick as possible and not too twisted. The power wire should be as close to the ground wire as possible. The ground wire should be wider than the power wire. For general boards, just pay a little attention.

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qwqwqw2088 posted on 2018-4-30 23:42 If it can be connected on one layer, there is no need to drill holes. Drill as few holes as possible. The ground wire and power wire should be as thick as possible and not too winding. The power wire should be as close to the ground wire as possible. The ground wire is thicker than the power...

The top chip has a blank bottom layer. Can any layer be used to directly connect the chip pins without drilling holes? Can the power wire and ground wire be wider and thinner in one section?

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If it's not high frequency and high current, it doesn't matter how you wind it. Just make the first prototype of your life. There's no need to pursue perfection, just make sure it can be used.

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qwqwqw2088

Da Da Da Da Da posted on 2018-5-1 12:45 The top layer chip is blank, can any layer be directly connected to the chip pins, power line and ground line without drilling holes? Can one section be wide and the other section be thin...

First clarify the relationship between the top and bottom layers. The top layer is a surface-mount device, and the wiring is usually on the top layer. If it is really impossible to route, you can drill holes on the bottom layer. This is not a tutorial, it is up to you to decide