Take a look a this paper. Here's an excerpt from the abstract.
"Direct writing (DW), also known as digital writing or digital printing,
is a family of flexible multi-length scale processes for the deposition
of functional materials to form simple linear or complex conformal
structures on a substrate. This paper provides an overview of key DW
technologies and their process characteristics under a unified
classification system."
You'll have to pay for it, of course, but it seems to be worth it.