Notch on Silicon Wafers

By: Eric P (eric.delete@this.nospam.com), July 1, 2022 3:07 pm
Room: Moderated Discussions
> In fact on 300 mm wafers, the area near the notch generally is relatively badly behaved, compared to other areas
> due to types of issues, and there were plans to do away with the notch on 450 mm wafers for similar reasons.

The notch has been removed on current 300mm wafers, as you can see in the pictures linked below.
What is used today to indicate the crystal orientation now that the notch is gone?

semiaccurate.com/2022/05/20/intel-shows-off-future-wafers-at-vision
semiaccurate.com/2015/11/12/samsung-shows-off-10nm-wafers-techcon
wccftech.com/tsmc-rumored-to-hike-chip-prices-by-25-by-2021-end-as-alleged-workers-receive-no-overtime-pay

TSMC has not updated their logo, which still has a notch on the wafer.
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TopicPosted ByDate
OK dumb question timeDoug S2022/06/24 12:31 PM
  OK dumb question timeanon52022/06/24 12:38 PM
  Silicon ingots are round.Mark Roulo2022/06/24 01:29 PM
    Silicon ingots are round.Squarehead2022/06/24 01:38 PM
      Silicon ingots are round.Mark2022/06/24 02:00 PM
        Silicon ingots are round.Gary Kopp2022/06/24 02:20 PM
      Silicon ingots are round.Adrian2022/06/24 10:34 PM
    Silicon ingots are round.tarlinian2022/06/24 02:38 PM
      Silicon ingots are round.Doug S2022/06/24 10:13 PM
        Silicon ingots are round.anon2022/06/25 10:34 AM
          Silicon ingots are round.Doug S2022/06/25 10:39 AM
            Silicon ingots are round.Groo2022/06/26 08:41 AM
              Silicon ingots are round.Doug S2022/06/26 11:05 AM
                Silicon ingots are round.Gtoo2022/06/26 01:55 PM
          Silicon ingots are round.rwessel2022/06/25 10:43 AM
            Not reallyGroo2022/06/26 08:39 AM
              Not reallydmcq2022/06/26 09:56 AM
                Not reallyGroo2022/06/26 01:58 PM
              Not reallyanon22022/06/26 04:22 PM
              Why not triangles? Anon2022/06/27 02:34 AM
                Why not triangles? Math Nerd2022/06/27 03:52 AM
                Why not triangles? Math Nerd2022/06/27 04:45 AM
                  Don't forget Penrose Tiling (NT)ananon2022/06/27 05:06 AM
                  Why not triangles? Doug S2022/06/27 06:43 AM
                  Why not triangles? Anon2022/06/27 07:33 AM
                    Die shape that minimizes wasted area on circular wafersMath Nerd2022/07/01 08:20 PM
                      Die shape that minimizes wasted area on circular wafersBrett2022/07/02 01:35 PM
                        Die shape that minimizes wasted area on circular wafersMath Nerd2022/07/02 03:15 PM
                        Die shape that minimizes wasted area on circular wafersMark Roulo2022/07/02 03:41 PM
                          Die shape that minimizes wasted area on circular wafersDoug S2022/07/02 05:44 PM
                          Die shape that minimizes wasted area on circular wafersBrett2022/07/02 11:31 PM
                            Die shape that minimizes wasted area on circular wafersAdrian2022/07/03 09:25 PM
                              Die shape that minimizes wasted area on circular wafersanon22022/07/03 10:33 PM
                                Die shape that minimizes wasted area on circular wafersBrett2022/07/03 11:45 PM
                                  Die shape that minimizes wasted area on circular wafersdmcq2022/07/04 05:09 AM
                                    Die shape that minimizes wasted area on circular wafersJames2022/07/04 08:52 AM
                                      Die shape that minimizes wasted area on circular wafersdmcq2022/07/04 09:26 AM
                                        Die shape that minimizes wasted area on circular wafersAdrian2022/07/05 02:28 AM
                                      Cannon Lake vs Kaby LakeMark Roulo2022/07/04 09:30 AM
                                        C-class bonusesblue2022/07/04 11:27 AM
                                          C-class bonusesanonymou52022/07/04 02:23 PM
                                  Die shape that minimizes wasted area on circular wafersanon22022/07/04 05:53 AM
                                    Die shape that minimizes wasted area on circular wafersBrett2022/07/04 11:32 AM
                                      Die shape that minimizes wasted area on circular wafersFoyle2022/07/04 12:30 PM
                                        Die shape that minimizes wasted area on circular wafersAnon2022/07/04 12:37 PM
                                          What is a mirrored die?Mark Roulo2022/07/04 01:59 PM
                                            What is a mirrored die?Brett2022/07/04 02:32 PM
                                              What is a mirrored die?Doug S2022/07/04 09:08 PM
                                        Die shape that minimizes wasted area on circular wafersanonymou52022/07/04 02:12 PM
                                          Die shape that minimizes wasted area on circular wafersFoyle2022/07/05 09:41 AM
                                      Die shape that minimizes wasted area on circular wafersanon22022/07/04 03:52 PM
                                        Die shape that minimizes wasted area on circular wafersUngo2022/07/05 05:24 PM
                                          Die shape that minimizes wasted area on circular wafersBrett2022/07/05 06:56 PM
                                            Die shape that minimizes wasted area on circular wafersanonymou52022/07/06 04:46 AM
                                              Die shape that minimizes wasted area on circular wafersdmcq2022/07/06 01:55 PM
                                                Die shape that minimizes wasted area on circular wafersMark Roulo2022/07/06 03:09 PM
                                                Die shape that minimizes wasted area on circular wafersDoug S2022/07/06 04:31 PM
                                      Example of mirrored wafer?Mark Roulo2022/07/04 05:01 PM
                                  Not the same as 3-core CPU from a 4-core dieMark Roulo2022/07/04 08:31 AM
                                Wafer probingAdrian2022/07/05 02:08 AM
                                  Great comment, thank you (NT)anon22022/07/05 11:00 PM
                crystal latticehobold2022/06/27 11:09 AM
                  crystal latticedmcq2022/06/27 02:58 PM
                  Given path dependency I doubt it ...Mark Roulo2022/06/27 05:02 PM
                    Given path dependency I doubt it ...Adrian2022/06/27 09:01 PM
              Hexagonal DieMath Nerd2022/06/27 04:05 AM
                Hexagonal DieAdrian2022/06/27 09:24 PM
                  Hexagonal Diedmcq2022/07/06 02:00 PM
          Silicon ingots are round.dmcq2022/06/25 01:38 PM
            Silicon ingots are round.dmcq2022/06/25 01:43 PM
          Silicon ingots are round.aaron spink2022/06/25 02:05 PM
      Notch on Silicon WafersEric P2022/07/01 03:07 PM
        Still there, I think ...Mark Roulo2022/07/01 03:47 PM
          Still there, I think ...Eric P2022/07/01 04:26 PM
            Still there, I think ...tarlinian2022/07/01 05:50 PM
              Still there, I think ...David Kanter2022/07/02 08:14 AM
            Still there, I think ...Mark Roulo2022/07/01 08:31 PM
              Still there, I think ...Eric P2022/07/01 11:10 PM
  OK dumb question timeanonymouse2022/06/24 02:47 PM
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