More rainbows from silicon chips

More rainbows from silicon chips

Picked up at Junk Independence Day, these are unencapsulated silicon chips. You can make out the solder pads around the top edges, and I think the two solid blocks are PROM storage. The chips are supposedly Mosel MSS1002-14T speech generator ROMs from 1991.

To give an idea of scale, the outside walls of each cell are 3.8 mm / 0.15ʺ.

Here’s another photo, taken through a very cheap 8× loupe with a cellphone camera:
Silicon Rainbow

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