![blinded hole board](http://www.knpcba.com/uploads/blinded-hole-board.jpg)
blinded hole board
8-layer-board, board-thickness: 2.40mm;
Finished Copper Thickness: 35um,
Finish: ENIG
![blinded and buired holes board with laser drilling hole](http://www.knpcba.com/uploads/blinded-and-buired-holes-board-with-laser-drilling-hole.jpg)
blinded and buired holes board with laser drilling hole
6 layer board, board thickness: 1.80mm;
Finished Copper Thickness: 35um,
Finish: ENIG