What is WLCSP packaging?

WLCSP (Wafer Level Chip Scale Packaging) is a very small, cheap IC package where the chip is packaged at the wafer level, without the bond wires used in traditional packaging.

What are the advantages of WLCSP over wire-bonded packages?

WLCSP eliminates bond wires, which reduces parasitic inductance that can cause problems for high-speed designs, while also being smaller and cheaper to produce.

WLCSP

Suggest an improvement

November 13, 2020

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.

package

The downside is that they are very tiny!

cross section

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

Course feedback

Having the formal verification part additionally felt nice, that I could have something that I know is going to be functional instead of just guessing for a long time and then looking at waveforms and then not knowing what hell I'm doing!

Dylan Wadler (digital course)