When making blind holes on a four-layer board, there is always a warning. I don’t know why?

fish001

When making blind holes on a four-layer board, there is always a warning. I don’t know why? [Copy link]

This information comes from the cooperative QQ group: Electronic Engineer Technical Exchange (12425841) The group owner's ID in the forum: Kata

Has anyone used AD to draw a four-layer board and always got a warning when making blind holes? I don't know why

kata

Use blind holes, it's better to add two more layers

fish001

Why?

kata

High cost, difficult to debug and test in production

fish001

I put a wireless module and a simple MCU control circuit together. Because there are many vias on the wireless module, I can't add blind holes on the small board. It always reports errors. So... I don't know how to set the blind holes on AD.

easy.释

How many places in China make blind vias? It's only a 4-layer board, but you use blind vias. If you can't use a 4-layer board, you can use a 6-layer or 8-layer board, which is definitely much cheaper than using blind vias.