Interuniversity MicroElectronics Centre (IMEC) of Belgium is what can be called an intermediate research organisation in the world of semiconductor fabs. Dr Santhosh Onkar has covered its history in detail in this article.
Given the possibility that IMEC could be a partner for current or future applicants for semiconductor fab incentives under India’s new policy with $10 billion initial outlay, there is some curiosity in whether the ‘technology’ provided by IMEC will be sufficient for the applicant to qualify for the incentives under the silicon semiconductor fab category.
First, let us look at what the policy says. As per the gazette notification of 21 December 2021, a screenshot of which is given below, the ‘operational experience’ requirement has two options.
As for IMEC, under the section “what we offer'' on its website, there are four categories — research, development, solutions and venturing. These categories are focused around research, prototyping and product innovation for which the institute offers use of its technology platforms. The platform itself is not built for high volume manufacturing. Quoting from a presentation (slides 4.5), in the silicon chip processing, IMEC offers "130nm down to 40nm" and the typical project cycle is as shown below.
The low-volume production capability of approximately 500 wafers per year is much less than the 40,000 wafers per month that the government of India notification has asked for. Moreover, that capacity at IMEC too does not seem to be a constantly running one, but more of a "need-to" basis when there is a partner needing product development. So it may not be possible to count IMEC as a fab as mentioned in option A of the notification.
How about option B — licensing a technology ? A paper titled "Models Of Technology Development In Intermediate Research Organisations", says that "With respect to its overall strategic positioning in technologies’ lifecycles, IMEC’s core research activities are concentrated in early phases where potential commercial value starts to emerge out of basic science".
To understand technology lifecycle in the context of semiconductor fabs and to look at what IMEC can offer from a 'technology readiness' perspective, I will use the terminologies mentioned in this presentation (slide 4) which were used in IBM's high volume manufacturing fabs:
Checkpoints include T0, T1, T2, S0, S1 and S2.
> T0 and T1 includes basic development with increasing levels of product qualification.
> T2 includes extensive functional and reliability qualification by an independent assurance group.
> S0 and beyond involves release to manufacturing and transition to quality control.
What I have come to understand is that IMEC can provide at best a T0 or equivalent technology. Ramping up from T0 to the S0/S1/S2 stages and achieving the typical yield percentages that are needed for high volume manufacturing can take close to three years — in the Indian context, after the new fab is built and equipped. This may not then qualify for the “production grade licensed technology" that is mentioned in option B.
Given that new commercial silicon fabs in India will need a quick ramp up in production in order to be able to capture the market, the ideal (and what the policy seems to ask for) scenario will be an established commercial fab bringing a technology that is already running in high volume production to a 'branch' that it opens in India on its own or as a joint venture (option A) or licence that to a business partner wanting to open a fab in India (option B).
Established commercial fab running high volume production are the likes of TSMC, Samsung, Intel, UMC, GlobalFoundries, Tower Semiconductors etc. IMEC's strengths as a leading R&D organisation are different — India should make use of those in the right areas. For example (but not limited to) help boost the R&D ecosystem that already exists in India through R&D fabs at IISc, IITs etc — more on that later.
Arun Mampazhy has a BTech from IITM and MS from University of Maryland in semiconductor fabrication and over a decade of industry experience. His dreams of seeing a commercial fab takeoff in India has changed from black and white to colour over two decades. He can be reached via email nanoarun(at)gmail(dot)com or @nano_arun on twitter. Views expressed are personal.
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