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"...

TSMC said that a batch of photoresist it used included a specific element which was abnormally treated, creating a foreign polymer in the photoresist. The problem was detected late when the wafer yields were lower than expected. As it turns out, consequences of the photoresist incident at Fab 14B were more serious than initially calculated by TSMC. There are media reports claiming that between 10,000 and 30,000 wafers were affected and had to be scrapped, but TSMC has never confirmed either of the numbers.

...

In any case, the cost of the wafers totals $550 million and they will be made up in Q2. In the meantime, TSMC is pulling in "certain production" from Q2, which will bring in $230 million in additional revenue in Q1. As a result, TSMC’s first quarter earnings are now expected to be between $7 billion and $7.1 billion, down from $7.3 - $7.4 billion predicted in mid-January.

..."

https://www.anandtech.com/show/13975/tsmcs-fab-14b-photoresist-material-incident-550-million-in-lost-revenue



Submitted February 20, 2019 at 08:55AM by amy31415 https://ift.tt/2Gztdjc

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