Semiwiki on LinkedIn Semiwiki on Facebook Semiwiki on Twitter Register / Log in 
Array
(
    [content] => 
    [params] => Array
        (
            [0] => /forum/threads/tsmc-discloses-n2-defect-density-lower-than-n3-at-the-same-stage-of-development.22699/page-2
        )

    [addOns] => Array
        (
            [DL6/MLTP] => 13
            [Hampel/TimeZoneDebug] => 1000070
            [SV/ChangePostDate] => 2010200
            [SemiWiki/Newsletter] => 1000010
            [SemiWiki/WPMenu] => 1000010
            [SemiWiki/XPressExtend] => 1000010
            [ThemeHouse/XLink] => 1000970
            [ThemeHouse/XPress] => 1010570
            [XF] => 2021770
            [XFI] => 1050270
        )

    [wordpress] => /var/www/html
)

TSMC Discloses N2 Defect Density Lower Than N3 At The Same Stage Of Development

my_wing said:
As TSMC did not specified, I remember TSMC N3B was reported to be having "serious" issues

technode.com

TSMC’s 3nm yield rate reportedly just 55% · TechNode

TSMC is struggling with its new 3nm process, with the semiconductor giant's yield rate reportedly far below the standard expected.
technode.com technode.com

also rumor that Apple was paying only usable die not the whole wafer.

With such a low target, it is not surprise that they can beat it and it is really not mean that much.

That just bring my calculation above making more sense, i.e. N2 is not production ready for a larger chip such as EYPC compute i.e. 50 - 80 mm^2 range, it could be the same 55 - 70% yield if they go ahead. AMD will then only pay for good die not the whole wafer. I also explain why Apple do not jump into N2 right away.

They are not ready !!!!
Click to expand...

Apple had a problem with their version of N3 and there was a delay. I believe it was an EUV issue, TSMC reduced the amount of layers to resolve it and better optimize N3. This will not be the case with N2. Several companies have already taped out including Apple and AMD. TSMC does make mistakes but they learn from them. I can assure you Apple does not pay for good die. Stupid rumor.
 
You must log in or register to reply here.
Back
Top