Design is one thing, fabrication is another. India has designed 22nm chipsets too but can only fabricate 180nm in mass scale. Iran may have designed chips but not fabricated them.
Iran doing 90nm fabrication 10 years back is a unlikely. The timeline of fabrication technology is:
2000-2001: 180nm
2002-2003: 135nm
2004-2005: 90nm
2006-2007: 65nm
2008-2009: 45nm
2010-2011: 32nm
2012-2013: 22nm
2014-present: 14nm
10nm is still under development while companies like Samsung wrongly brands 14nm as 10nm by using different measurement parameter. But real 10nm of intel is not yet out.
Iran having 90nm technology in 2009-2010 is unlikely as only USA and its minions (Korea, Taiwan) had the technology. USA was leading by at least 10 years ahead of nearest rival of China & Russia. How can Iran get so advanced technology then?
I can't understand a word of what they are saying. I have only one question- whether Iran manufactured the chipset in Iran or only designed it in Iran and then got it manufactured by someone else in limited quantity?
Of course, Iran won't announce all military technology. But everyone is looking for semiconductor technology with Iran as semiconductor technology is more important than even nuclear technology. Someone will notice if Iran is indeed capable of making chipsets. Though, it is not necessary that they will disclose it in public.
Here is an article about Iran designing CPU but getting it manufactured in Taiwan:
https://www.eetimes.com/iran-develops-32-bit-processor/
Are you sure you are not speaking of this?