iMechanica - Thin Film Mechanical Properties - Comments

Thanks, great article, good

mixmagtmb — Thu, 18 Dec 2008 15:27:27 -0500

Thanks, great article, good film.

Thank you Prof. Nix

leila ladani — Thu, 06 Dec 2007 13:31:26 -0500

Thank you for your useful notes. I am teaching micromechanics of materials next semester and I am sure that I could use some of your notes.

Thank you

Vahid Mirjalili — Mon, 12 Nov 2007 11:10:00 -0500

Thank you Prof. Nix for the Note. Yours, Vahid

Thanks for a useful notes

ashokpandey — Sun, 07 Oct 2007 10:55:41 -0400

Thanks for a useful notes on thin-film

correction

Rui Huang — Fri, 10 Aug 2007 22:35:26 -0400

Oops, I forgot the CTE of the substrate. The correct solution should be: CTE(film) = (dh/dT)/h * (1-nu)/(1+nu) + 2*nu/(1+nu)*CTE(substrate).

Take nu = 0.5 for incompressible cases.

a simple thermoelastic solution

Rui Huang — Fri, 10 Aug 2007 22:29:05 -0400

If the polymer is incompressible, the rate of thickness change is identical to the rate of volume change, from which you should be able to determine the CTE (assumed to be isotropic).

If the polymer is compressible, you also need to know Poisson's ratio (nu): CTE = (dh/dT)/h * (1-nu)/(1+nu).

Dear Professor Nix: Thank

zhan-sheng guo — Fri, 29 Jun 2007 09:52:36 -0400

Dear Professor Nix:

Thank you very for sharing your notes!

I would like learning this note carefully. I'm interest in this field.

guo

Valuable notes to prepare students for the thin film industry.

Ting Tsui — Thu, 14 Dec 2006 15:15:54 -0500

This set of class notes presented a wide range of thin film mechanics topics that are important for the integrated circuit (IC) and other thin film industries. In fact, most of my basic thin film mechanics knowledge was obtained from this set of notes ~10 years ago. The document introduces the basic concepts of residual stress in thin films and its impact on wafer curvature. Wafer curvature technique is still one of the most common and important methods for daily process qualifications in any IC fabrication plant. Film stress is the driving force for most of the catastrophic failures (delamination and cracking) during IC production. Professor Nix’s class notes also discussed other experimental methods, such as XRD, that are commonly used to extract stress components in metal interconnect line generated during processing. These are useful tools in understanding the effects of process integration methods on the via-stress-voiding defects. Contact mechanics in nanometer scale (nanoindentation) were also introduced in this class. They are important in understanding the physics of chemical mechanical polish (CMP) and tribology processing.

Virtual classroom of Thin Film Mechanics

Teng Li — Thu, 14 Dec 2006 14:27:00 -0500

Dear Prof. Nix:

Thanks for sharing your notes here in iMechanica. I believe many of the iMechanicians who has downloaded your notes, as Rui and I did, will appreciate your generosity.

Here I propose this post to serve as a virtual classroom of "Mechanical properties of thin films" for students from all over the world, where students can raise questions, and then experts like Prof. Nix can answer. This way, education reaches the world without boundary.

Rui: also look forward to your slides on this.

-Teng

similar courses on thin films

Rui Huang — Thu, 14 Dec 2006 12:12:12 -0500

Dear Professor Nix:

Thank you for sharing your notes!

I am teaching a similar class this semester, which is over now. I have downloaded your notes for future uses in my classes. Because of my background, I focus more on mechanics in my class, following a similar structure as the book by Freund and Suresh. My colleague, Paul Ho, teaches two other courses focusing on the processes and materials aspects of thin films. I believe several others teach similar thin film classes elsewhere. It would be nice to compare and share notes. I will post my slides later.