This package is very small and cheap to produce. It also has benefits due to the lack of bond wires. Bond wires increase parasitic inductance, and can be a problem for high speed designs.

The downside is that they are very tiny!

The last 5 layers of the Skywater PDK define the layers necessary to build the WLCSP package.

Course feedback

At first I wasn’t interested in testing at all, but by the end of the course somehow it got quite fascinating just to figure out all the ways to test the design.

Renaldas Zioma (digital course)