Hi the CI 2309 says skywater 130A where as I used 130 B for my tapeout.Is that an issue? I have rram in design @Tim Edwards @jeffdi

@samarth jain: We do split lots, which means that part of the shuttle run will go through normal processing, and some wafers will be split off and get the ReRAM layers. I have recommended that the information be posted as "130A/B" to be clearer, but that hasn't been done yet.

So to confirm, my chip will follow 130 B? Right?

To be accurate, everbody's design will follow both 130A and 130B. If everybody is paying attention as they should, we will ship you the one that was processed on 130B.

O so generally both 130 A and 130 B are done 😅 ,looks little weird 😂 .It will cause die wastage ?

That's what it means to do a split lot. Half of everything is on the wrong split and gets thrown away (although I would like to get some non-ReRAM designs from both A and B splits to see if there is any measurable difference between the two).

I seee ,yes sounds reasonable now.

It becomes a short circuit. sky130B designs fabricated on sky130A split = dead chip sky130A designs fabricated on sky130B split = probably-working chip with some different timing characteristics (because all metals from metal2 and up are higher, and all the via1 contacts are twice the resistance because they are twice as high).