SkyWater Technology, the US DoD sponsored fab, and Efabless, a crowdsourcing design platform for custom silicon, are accepting designs  for a series of Google-sponsored open source MPW shuttles that will run at SkyWater.
Through a partnership between Google, SkyWater and Efabless, open source designs selected by the program will be fabricated at no cost to the designers.
The MPW program is enabled by the first foundry-supported open source process design kit (PDK) for 130 nm mixed-signal CMOS technologies (SKY130 process).

The initiative will enable a complete open source manufacturing supply chain for custom application specific integrated circuits (ASICs) and has been discussed in a series of talks produced by the FOSSi (Free and Open Source Silicon) Foundation including presentations by Google and Efabless.
Google supports open source silicon a a founding member of both the RISC-V Foundation and the Linux Foundation’s CHIPS Alliance project.
In support of the shuttle program, Efabless has released a complete Apache 2.0-licensed open source RTL2GDS design stack, referred to as openLANE, that supports the SKY130 PDK and is available to designers worldwide.
With open source designs and a standardized test harness produced by Efabless that is open and freely available, verification results can be easily and cost-effectively replicated by other designers, enabling a new model to evaluate and iterate on ideas. This community-based model also brings a new and effective approach to product verification and security.
This offering has implications for accelerating innovation in the 130 nm mixed-signal SoC node popular for IoT type applications by removing barriers and obstacles relating to experimentation and collaboration for IC design. The model and its innovative outcomes are extensible to advanced nodes over time.
The open source foundry PDK is accessible at https://github.com/google/skywater-pdk and by the time of this announcement, has been downloaded more than 1700 times in the past two weeks. Efabless has created a digital portal to enable customers to follow a step by step workflow to submit their designs as candidates for the MPW shuttle.
The Efabless portal is active now and will accept designs through November 30, 2020. Efabless will perform license and data integrity checks followed by design rule checking prior to assembling the shuttle. Each shuttle run will have 40 design slots (seats) and the first run is scheduled to launch in Q4 2020. In the case submitted designs exceed the number of seats on a shuttle, designers will be deferred to the next shuttle.