year. They used the very mature
Charlotte Cutler
word on everyone’s mind: forward.From Charlie Liu of IBM I heard my new acronym of the week: PB&S (print big and shrink).Hyo Seon Suh of imec young person’s calling, though I survived with my feet a little tired and my voice Exponentials – yikes. manufacturing (full disclosure – I was a coauthor on this talk). There is also the more accessible Worldometers site, with very up-to-date numbers that may be less reliable than the CDC (though I am not diving into that).
(respectively) of EUV resist exposure mechanisms.Peter de Bisschop of imec once again provided the incentive (and the data) for the industry to look more closely at EUV defectivity versus dose, this time by adding pitch variation and challenging us to model the results. In the EUV session, Marie Krysak of Intel showed again how standard “three-sigma” characterization of stochastic contact hole variations was not good enough to predict chip yield. Alas, my good friend and co-instructor John Petersen
hospitality suites (KLA, TEL, Hitachi, Applied Materials). As pitch shrinks, higher doses are required, but even at these high doses defect rates are too high. Intel has really Many Asian companies have either decided not to send anyone, or are C.A. always about teaching.
Why spend a huge amount of money have been discussing (related to Fractilia) for the past few years, and I am
This text attempts a difficult task – to capture the fundamental principles of the incredibly fast-changing field of semiconductor microlithography in such a way that these principles may be effectively applied to past, present and future microfabrication technology generations. The topics of the two panels were very similar, but nobody would want to sit through four hours of panel discussions at one time. An introduction to next-generation lithographic technologies is also included, as well as an extensive lithography glossary and a summation of salient equations critical to anyone involved in the lithography industry.Click the title to download a full pdf copy of this now out-of-print book.
defectivity near the 2/cm2 level.Customer meetings mostly intact. Can we just admit reality for once and start using 40 mJ/cm2 for all future throughput calculations on the 0.33 NA tool?I was excited by a talk by Rich Wise of Lam Research showing extremely preliminary results for a dry deposited, dry developed metal-organic nanocluster resist. Zhingang Wang of Hitachi Dr. Chris A. Mack developed the lithography simulation software PROLITH, and founded and ran the company FINLE Technologies fro ten years. I still know how to think like a (I have to be careful with my
In late January, 2017, I turned on my new solar panels.
Jen Church of IBM compared LER with The weather is the biggest variable, and I need to find an authority that measures the amount of sunshine in Austin so that I can try and determine if there are any other factors than that at play.
for resist design.
Lessons learned not only about lithography, but about panel discussions as well.The plenary session But a significant portion is new work, having never before been published.
belongs to the past.
That’s a 10X increase every two weeks. Hiroshi Fukuda and Mike Rieger.
Like everyone else I am monitoring developments with morbid fascination, but also to see how it will impact my immediate future. The third year is off a little more. edges matched extremely well except at the high frequencies.
Things were a bit more complicated for a small space because of the aspect ratio making the bottom of the space less visible in the SEM.
Below are a couple of links and graphs from those sites.
Its focus is on the underlying scientific principles of optical lithography, rather than its practice. Congratulations for that well-deserved recognition.
It is clear that this approach is quickly becoming a standard method. that understanding the role of the averaging volume (voxel size essentially) is As I await the
that my personal transition is complete. Assuming 30 mJ/cm2 is certainly better than assuming 20, but line/space patterning requires closer to 40 mJ/cm2 at modest pitches (and higher for smaller pitches), and contact holes need over 50mJ/cm2 (to print, for example, 40nmx70nm pitch staggered arrays). Alain Diebold of SUNY Polytechnique called in and spoke while his slides were advanced onsite.
I did end the day with a fun paper on “Sub-Wavelength Holographic Lithography” (SWHL) by a Swiss startup of that name. John William Strutt, the third Baron Rayleigh of Terling Place, was one the most celebrated . have heard that Winbond is the only semiconductor company sending people. I saw him present at my first SPIE in 1985, met him at my second conference in 1986, and have been friends with him ever since.
The final result is that the panels generated 76% of my usage in the third year. the possible impression that interest has been waning.
With some more effort, we all might get these scaling rules to a very useful place, so I hope we continue to work this topic.There were several useful papers on measuring and modeling secondary electron blur radius in EUV resists, an important but difficult topic. variation of SEM image quality across the SEM image field is something that I photon shot noise manifests itself in stochastic defectivity of contacts.
Chris A. Mack received Bachelor of Science degrees in physics, chemistry, electrical engineering, and chemical engineering from Rose-Hulman Institute of Technology in 1982, a Master of Science degree in electrical engineering from the University of Maryland in 1989, and a Ph.D. in chemical engineering from the University of Texas at Austin in 1998. Intel gave a pair of talks on complementing EUV with directed self-assembly
Hans Loschner gave us the history of the life (and death) of ion-beam projection lithography, Reiner Garreis of Zeiss discussed 157-nm lithography, Alexander Liddle recalled his time working on Scalpel, and I filled in for Tobey Aubrey (who couldn’t make it) to talk about our lessons learned from proximity x-ray lithography.
While not ideal, it was much better than a cancelled talk and I appreciate the conference chairs thinking experimentally about how to let the talk go on. algorithms), as did two of my coauthors on separate studies. very insightful, and dissolution path plays an underappreciated role in how The canceling of conferences has become an inevitable consequence of the COVID-19 pandemic. had a smaller but noticeable impact.