Fast Characterization of Defects and Inclusions in Multi-layer Films Presented by: Peng Gao Analytical chemist, Eastman Performance Films Date: October, 29th, 2018 Approved for external use

Eastman Performance Films, LLC Martinsville, VA, US Scratch Resistant Coating Mounting Adhesive Laminated Components PET+ Dye Metal Deposit (vapor deposition and sputtering) Release liner PET Silicone Approved for external use

Overview Contaminants in optically clear films Large impact on quality Trapped in multi-layers Particles: 5-100 microns Organic/inorganic 100 µm Approved for external use

Analysis of contaminants Involves deconstruction of multi-layer films or microtome techniques. Analysis of contaminants using current techniques could take a couple of days. Location information is very often inconclusive. Approved for external use

Approved for external use

Cutting by hand is not precise enough Approved for external use

Nanoindenter (CB500, Nanovea) modified with cutting blades Nanoindenter offers precise control to cut through the contamination in films. Locate the contamination using the built-in microscope Cut through the contamination using a sharp blade. Approved for external use

Samples cut by the new technique Approved for external use

Small particle contamination 5 microns 30 µm 40 µm Approved for external use

Approved for external use Flaky contamination Approved for external use

Outcome of the new technique Deconstruction New technique Took days Machine? Process? Took less than 2 hours In the coating Approved for external use

Microtome vs. Nanoindenter technique Advantages No contamination from resin embedding Fast Precise Limitations Non-contact methods of chemical analysis Organic contamination Approved for external use

Approved for external use Summary A new technique for faster identification of contamination was developed by cutting precisely through contaminants. Works for contamination as small as 5 microns. No chemical or resin are needed. Provides more conclusive information on the location of contamination (process & machine), offering a possible source for root cause analysis. For organic contamination, microtoming may be required. Approved for external use

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