All of Asia Vintage Four-Phase Systems RAM 9 Silicon Wafer

[Steve Tinter]

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Vintage Four-Phase Systems RAM 9 Silicon Wafer – NMOS 4-phase dynamic logic​

https://www.ebay.com/itm/376643182706

Offered here is a vintage Four-Phase Systems “RAM 9” silicon wafer, populated with repeating memory dies from the early NMOS LSI era. This is an original manufacturing artifact—a fantastic display piece for vintage-computing collectors, chip historians, and educators.

The wafer clearly have the Four-Phase logo as pictured.

 

[NeXT]

So pretty.

...So expenisve... ;_;

Edited: What's with the listing calling it RAM9 but the mask etch calls it RAM3, which was some of their earliest design?