The never ending story of TSMC's 28nm process
Subject: General Tech | April 17, 2012 - 08:12 PM | Jeremy Hellstrom
Tagged: TSMC, 28nm
Once again DigiTimes is focusing on TSMC's 28nm process, a node which we have been hearing a lot about for a long time. Today they are proposing that perhaps the industry has been a bit harsh on TSMC and the availability of working 28nm silicon from that manufacturer. Their analyst suggests that the 28nm node is still new to the industry and that the production lines still do not have all of the bugs worked out, let alone optimizations to decrease the time it takes to produce a wafer. This is at least partially true though AMD has been using TSMC for its 28nm Southern Islands GPUs for a while now, other companies have not been so successful in using TSMC. That seems to have scared other companies, not only is NVIDIA looking elsewhere for chips, Qualcomm is as well. On the other hand, ARM is trying to get their customers to do the opposite, and are optimising their processors for TSMC's 28nm node, as well as the older 40nm.
DigiTimes may be spot on when they describe TSMC's 28nm process production speeds as increasing faster than previous nodes have and that the problems are only for specific chips and not across the board like the 40nm issues were. Since TSMC is predicting that they will be running at 95% capacity by the end of the year they had better hope that they can speed production and find a way to do so without having to shut down entire production lines in order to implement any optimizations they discover along the way as any drop in supply is going to be poorly received by customers.
No process transition goes smoothly. TSMC may be in the news more frequently than other Fabs but those competitors are not without their difficulties as we saw with the limited amount of GLOBALFOUNDRIES produced Llano chips at the end of last year. Hopefully the current yields do improve, not just for the sake of the GTX 680 but for all of the other customers planning on moving to this node. In the meantime, it offers a tech-centric soap opera for enthusiast to watch and speculate on.
"Taiwan Semiconductor Manufacturing Company (TSMC) could ramp up its 28nm production capacity at a much faster pace than older 40/45nm and 65nm process nodes, according to Digitimes Research analyst Nobunaga Chai. To make such speculation about yield problems with TSMC's 28nm processes is unfair, said Chai, adding that the foundry is actually improving the process yield rate within its expectations."
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