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I thought they presented SALELE with one block mask. Actually, it is usually presented with two block masks, one for each of the two metal line sub-patterns.
This news is over a year old. Intel has mentioned that which one they use will depend on which one is better almost a half dozen times at this point. Parallel developments and derisking high risk items were two of the things Ann K said she changed about how Intel does development during interviews she has done over the years.
They have mentioned it on earnings a couple of times when folks were concerned about risk. I think when Ian Curtis interviewed Pat last year Pat mention it. I think Intel discussed it at last SPIE. Lastly they also showed off a completed 14A wafer with test chips last direct connect (which was like 1-2 weeks after Intel got first light on their first tool). It would be impossible for that wafer to be made with highNA proving without a shadow of a doubt there was always a low NA version. After all kind of hard to develop a process without the tools to make it.
They have mentioned it on earnings a couple of times when folks were concerned about risk. I think when Ian Curtis interviewed Pat last year Pat mention it. I think Intel discussed it at last SPIE. Lastly they also showed off a completed 14A wafer with test chips last direct connect (which was like 1-2 weeks after Intel got first light on their first tool). It would be impossible for that wafer to be made with highNA proving without a shadow of a doubt there was always a low NA version. After all kind of hard to develop a process without the tools to make it.
Okay, I heard differently. My take is that Pat Gelsinger wanted to be first on HNA-EUV and he bit off more than he can chew, but that was the original plan, 14A would be HNA-EUV. Intel Fab 62 and 56 in AZ are both HNA-EUV capable. It is a bigger footprint than EUV.
I know Intel has HNA-EUV testing with 18A in OR so maybe those are the wafers we see. There was a display case with wafers at the Intel event but we were not allowed to take pictures or even get too close. There was a security guard chasing people away.
I do know that TSMC has a superior proprietary EUV methodology to what Intel and Samsung have so HNA-EUV will have to improve quite a bit before TSMC uses it for HVM.