via padstack question

[mspagon]

I have a four layer PCB, TOP/VCC/GND/BOTTOM

When I route from Bottom to VCC the via connecting the two has BOTTOM, hole in the ground, VCC, and a little dot connecting to TOP. Why would it even go to top if I'm not routing in it. Also the previous PCB that I am editing has a ton of little dots on the top and bottom where no routing is seen because it either goes from top to vcc or bottom to vcc... Is there a reason for this? Easy to manufacture?

Thanks.

 

[PCB design]

Edit your Via padstack to blind or buried vias......

 

[marce]

How much PCB design knowledge do you have?
The vias are probably stiching vias for GND copper pour.
You should not need to use blind vias on a 4 layer board!

 

[sivamani]

Since it is a through hole via ,you will be seeing from top to bottom and via may be connected in any one of the layers.

 

[Mattylad]

Look at the costs involved in Blind vias.

You can expect a heavy increase in the cost when using them and.

 

[praveenlb]

Edit your Via padstack to blind or buried vias......

I never suggest to use blind and buried via for 4 layer card.