PCB-Stack Design Papers

PCB Stack-Up -- Part 5 - Ten-Layer Boards
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PCB Stack-Up
Part 5. Ten-Layer Boards

A ten-layer board should be used when six routing layers are required.  Ten-
layer boards, therefore, usually have six signal layers and four planes. 
Having more than six signal layers on a ten-layer board is not
recommended.  Ten-layers is also the largest number of layers that can
usually be conveniently fabricated in a 0.062" thick board.  Occasionally
you will see a twelve-layer board fabricated as a 0.062" thick board, but
the number of fabricators capable of producing it are limited..
High layer count boards (ten +) require thin dielectrics (typically 0.006"
or less on a 0.062" thick board) and therefore they automatically have
tight coupling between layers.  When properly stacked and routed they can
meet