By: Foyle (user.delete@this.domain.com), July 4, 2022 1:30 pm
Room: Moderated Discussions
Brett (ggtgp.delete@this.yahoo.com) on July 4, 2022 12:32 pm wrote:
> You can tell which manufacturers are smart by the die layout on the wafer, and
> mirrored dies in the reticle. Explain why some wafers have a split down the middle
> and GPU pointing to the right on the right half and the left on the left.
>
> By having a pair of mirrored die in the reticle you can guarantee
> which corner is going to be cut by the circle of the disk.
>
> Please explain the extra cost of testing mirrored dies,
> unless this is to recover more good die from the edges.
>
That's the first I hear of it. Please provide an example of a recent big chip that exists in two mirrored versions.
> You can tell which manufacturers are smart by the die layout on the wafer, and
> mirrored dies in the reticle. Explain why some wafers have a split down the middle
> and GPU pointing to the right on the right half and the left on the left.
>
> By having a pair of mirrored die in the reticle you can guarantee
> which corner is going to be cut by the circle of the disk.
>
> Please explain the extra cost of testing mirrored dies,
> unless this is to recover more good die from the edges.
>
That's the first I hear of it. Please provide an example of a recent big chip that exists in two mirrored versions.
