Homebrew PCBs

Just for a laugh:

I just read "Tinker",   by Wen Spencer.


It's set in the future, and there's a repeated mention of "circuit  
paper".

Anyone in the future who wants to run off a PCB prints with metallic- 
bearing inks on peel-n-stick 'paper',  then sticks it on a substrate  
and surface-mounts components.

One example was applying the circuit paper to human skin....  I  
thought maybe some people on this list would find the idea cute.

Obviously it wouldn't be actually wood cellulose-based paper.   But  
printing on mylar might work if you could attach components with  
conductive glue rather than solder.

How about ferric oxide or silver paste (like heat-sink paste)  
formulated into standard hot glue sticks?

Later in the novel, they also had markers with metallic inks in a  
buckeyball matrix.

I had an idea years ago in my antenna-building phase, of drawing  
antennas on glass with conductive ink pens.

Of course mechanically mounting lead wires to the glass would be tricky.