Why does IBM use so many metal layers?

By: anon (anon.delete@this.anon.com), September 11, 2019 6:09 pm
Room: Moderated Discussions
IBM CPUs seem to use about 50% more metal layers than Intel, I wonder what the reason is. Let's forget mainframe with huge power draw and very high clock frequencies, and incremental cost to manufacture probably being virtually irrelevant.

POWER9 is much more similar in characteristics to a Xeon, yet it uses 17 metal layers compared with 14nm Xeon's 11 layers.

I wonder what it is about physical design methodologies and tradeoffs that give rise to this difference.
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TopicPosted ByDate
Why does IBM use so many metal layers?anon2019/09/11 06:09 PM
  Why does IBM use so many metal layers?Ricardo B2019/09/11 06:47 PM
    Why does IBM use so many metal layers?anon2019/09/11 11:21 PM
      Why does IBM use so many metal layers?Ricardo B2019/09/12 04:02 AM
        Why does IBM use so many metal layers?anon2019/09/12 04:11 AM
      Why does IBM use so many metal layers?Adrian2019/09/16 05:17 AM
        Why does IBM use so many metal layers?Michael S2019/09/16 07:39 AM
        Why does IBM use so many metal layers?Joseph2019/09/16 04:16 PM
  Why does IBM use so many metal layers?anon2019/09/12 02:02 AM
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