I'm designing a 4 layer PCB, using positive and negative power planes along with a ground plane and a top signal layer. While making the schematic I've notice strange little Xs in some of the through holes of my through hole parts. Here is an example.
I'm wondering if the little cross in the middle of the through hole means that a connection is being made from pin 4 of this chip to the VS- layer. In other words, is the via connecting the VS- layer (layer 15) to pin 4 unnecessary?
Also, I know that the via shows up as a design rule violation. I need to change the minimum blind via ration for this board, and I'm not looking for advice about this.