Homebrew PCBs

"Stefan Trethan" <stefan_trethan@...> writes:
> I don't understand how you can solder the VIAs in between the boards,
> for example.
> 
> Maybe you can like sketch a cross section?

I'll try...  = is copper, - is some other boundary, # is solder, W is
wire, copper marked with * is drilled before taping layers together:

Through via:
               #####W#####                  
=================== W ====================== signal
                  | W |                      8 mil FR4
==========--======= W =======--============= ground
                  | W |                      16 mil FR4
------------------- W ---------------------- (tape between boards)
                  | W |                      16 mil FR4
==========--======= W =======--============= power
                  | W |                      8 mil FR4
=================== W ====================== signal
               #####W#####                  

Blind via:
           ###################              
=============== ######### ================== *
              | ######### |                 
============================================
                                            
--------------------------------------------
                                            
============================================
                                            
============================================
                                            

Far-plane via:
               #####W#####                  
=================== W ======================
                  | W |                     
==========--======= W =======--=============
                  | W |                     
------------------- W ----------------------
                  | W |                     
=================== W ======================
          |    #####W#####      |           
===========                     ============ *