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In the table on the page, why does "Foundry sale price per chip" decrease, while "Foundry sale price per wafer" increase? Does it have something to do with the
by etaioinshrdlu 6y ago
In the table on the page, why does "Foundry sale price per chip" decrease, while "Foundry sale price per wafer" increase?
Does it have something to do with the average chip area being much larger at larger process nodes?
- nimish 6y agoArea, intrinsic process cost, and also TSMC is a monopoly at the leading-edge node. They can charge what they wish.
- swsh 6y agoI assume as transistor density increases, you get more chips per wafer.
- tyingq 6y agoAMD style chiplets also increase yield.
- 4cao 6y ago> In the table on the page, why does "Foundry sale price per chip" decrease, while "Foundry sale price per wafer" increase I had the same question. Seems it's based on an earlier table in the same PDF (see my top-level comment for source link), namely Table 7 on page 41, which lists transistor density to calculate average chips per wafer. And then, for the table referenced in the article (which is Table 9 in the PDF), it says: "In line 8, we convert the per wafer value to a per chip value by dividing by the number of chips per wafer of a given year’s node listed in Table 7."
- mindslight 6y agoLine 8 of Table 9 is misleading out of context. If you dig into the report itself, it's calculated based on a hypothetical chip with the same number of transistors for each process (Table 7). For example, the 90nm process is listed as yielding "0.7" chips per wafer, which is obviously nonsensical. Line 8 would be more appropriately described as "cost per 90.7 billion transistors", if I am reading the report right.