TSMC this afternoon has disclosed that it will expand its production capacity for mature and specialized nodes by about 50% by 2025. The plan includes building numerous new fabs in Taiwan, Japan, and China. The move will further intensify competition between TSMC and such contract makers of chips as GlobalFoundries, UMC, and SMIC.

When we talk about silicon lithography here at AnandTech, we mostly cover leading-edge nodes used produce advanced CPUs, GPUs, and mobile SoCs, as these are devices that drive progress forward. But there are hundreds of device types that are made on mature or specialized process technologies that are used alongside those sophisticated processors, or power emerging smart devices that have a significant impact on our daily lives and have gained importance in the recent years. The demand for various computing and smart devices in the recent years has exploded by so much that this has provoked a global chip supply crisis, which in turn has impacted automotive, consumer electronics, PC, and numerous adjacent industries.

Modern smartphones, smart home appliances, and PCs already use dozens of chips and sensors, and the number (and complexity) of these chips is only increasing. These parts use more advanced specialty nodes, which is one of the reason why companies like TSMC will have to expand their production capacities of otherwise "old" nodes to meet growing demand in the coming years.

But there is another market that is about to explode: smart cars. Cars already use hundreds of chips, and semiconductor content is growing for vehicles. There are estimates that several years down the road the number of chips per car will be about 1,500 units – and someone will have to make them. Which is why TSMC rivals GlobalFoundries and SMIC have been increasing investments in new capacities in the last couple of years.

TSMC, which has among the largest CapEx budgets in the semiconductor industries (which is challenged only by Samsung) has in recent years been relatively quiet about their mature and specialty node production plans. But at their 2022 TSMC Technology Symposium, the company outlined its plans formally.

The company is investing in four new facilities for mature and specialty nodes:

  • Fab 23 Phase 1 in Kumamoto, Japan. This semiconductor fabrication facility will make chips using TSMC's N12, N16, N22, and N28 nodes and will have a production capacity of up to 45,000 300-mm wafer starts per month.
  • Fab 14 Phase 8 in Tainan, Taiwan.
  • Fab 22 Phase 2 in Kaohsiung, Taiwan.
  • Fab 16 Phase 1B in Nanjing, China. TSMC currently makes chips on its N28 in China, though the new phase was once rumored to be capable of making chips using more advanced nodes.

Increasing mature/specialized capacity by 50% over the next three years is a big shift for the company, and one that will improve TSMC's competitive positions on the market. What is perhaps more important is that the company's specialty nodes are largely based on its common nodes, which allows at least some companies to re-use IP they once developed for compute or RF for a new application. 

"[Our] specialty technology is quite unique as it is based on common technology platform  [logic technology platform], so our unique strategy is to allow our customer to share or reuse many of the [common] IP," said Kevin Zhang, senior vice president of business development at TSMC. "For example, you have RF capability, you build that RF on a common logic platform, but later you find 'hey someone need a so-called ULV feature to support an IoT product application.' You want to build that on a common platform so you can allow different product lines to be able to share IP across the board, this is very important for our customers so we do want to provide a integrated platform to address the market needs of customer from product perspective.' 

There are other advantages too. For example, TSMC's N6RF allows chip designers to combine high-performance logic with RF, which enables them to build products such as modems and other, more unique solutions. Many companies are already familiar with TSMC's N6 logic node, so now they have an opportunity to add RF connectivity to something that benefits from high performance. GlobalFoundries has a similar approach, but since the U.S.-based foundry does not have anything comparable to TSMC's N6, TSMC has an indisputable advantage here.

With its common platform approach for mature nodes as well as specialized technologies, and 50% more capacity, TSMC will be able to offer the world more chips for smart and connected devices in the coming years. Furthermore, it will also benefit TSMC by significantly increasing the company's revenues from mature and specialized nodes, as well as increasing pressure on their rivals.

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  • ballsystemlord - Thursday, June 16, 2022 - link

    This might be a dumb question, but why can't these specialized technologies be moved to smaller nodes?
    Yes, the shrink might not be much compared to logic, but there's bound to be some transistors and/or other elements inside of the designs that could see benefits and the demand for more products and smaller ones is there.
    Reply
  • BushLin - Thursday, June 16, 2022 - link

    Because whatever benefits there might be, it won't be considered to be worth the cost to the manufacturers of products (at scale of say, car makers) so the demand won't be there for the foreseeable. Reply
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  • gdansk - Thursday, June 16, 2022 - link

    Imagine that some of these are designs being brought over from old nodes like 90nm, 65nm. Reply
  • Doug_S - Friday, June 17, 2022 - link

    A lot of these specialized technologies are either:

    1) such small circuits that a shrink is pointless - i.e. they are pad/pin limited
    2) they are something like power or RF ICs where the transistors don't scale and even if they do the wires won't (especially in the case of power ICs)
    3) the sell for so little (at least in normal times) that it would take a thousand years to pay back the cost of the N5 mask sets...how you going to make the numbers work for something that sells for 25 cents?
    Reply
  • Wereweeb - Friday, June 17, 2022 - link

    Analog is very difficult to scale, some IC's simply wouldn't benefit from the transistor scaling offered by newer nodes.

    Mature nodes also have their own benefits in terms of being very well understood (And therefore having predictable properties), being faster and easier to tape out, generally more reliable, etc...

    See also: "If it works don't fix it"
    Reply
  • Lonyo - Sunday, June 19, 2022 - link

    There is a cost to redesign for a node shrink, but also the cost of the product on a newer node can be more expensive than on an older node.

    TSMC needs to invest more and more each new node, so the cost per mm can increase, even though the number of mm decreases. So a 14nm chip could be cheaper than a die-shrunk 10nm or 7nm of the same.
    Reply
  • andychow - Sunday, June 19, 2022 - link

    The smaller nodes are completely booked. The demand is over 100%, so to land to these is impossible. It's the same reason AMD is using dual nodes: they can produce more overall chips.
    Now, if you wanted to make RAM on the smallest nodes, TSMC just wouldn't be able to fill that order for years, because bigger and wealthier clients would outbid you.
    If you notice the article talks about chips for cars also. Well recently there was a shortage that lasted over a year.
    Tl/dr: the demand for the smallest nodes is much much higher than the capacity.
    Reply
  • webdoctors - Friday, June 17, 2022 - link

    I've been to Tainan, Kaohsiung and Hsinchu, beautiful places to hop off and on from the high speed train. But isn't it kinda risky for TSMC to put all their most advanced factories so close together? There was a hurricane 2 years ago that knocked out the refineries in Texas for like a week spiking gas prices in the USA for a week. If something happens in a much smaller area it would spike prices for the entire world for months.

    Typhoons, earthquakes, power outages are already annual events. Sure there's some supply chain efficiency having everything together but seems the planet is trying to test us lately...
    Reply
  • nandnandnand - Friday, June 17, 2022 - link

    Hurricanes, yeah, that's one reason not to put fabs in Taiwan. There may be other reasons. Reply

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