Formation of Conducting Columns in Adhesive Epoxy

2006 ◽  
Author(s):  
M.F. McInerney ◽  
T. Bruemmer
Keyword(s):  
Adhesive Epoxy

Self-adhesive epoxy modified silicone materials for light emitting diode encapsulation

2017 ◽  
Vol 28 (11) ◽  
pp. 1473-1479 ◽  
Author(s):  
Yishan Liu ◽  
Xinying Luan ◽  
Yakai Feng ◽  
Xiaohua Tan ◽  
Ying Han ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Light Emitting ◽  
Adhesive Epoxy

Managing Epoxy Tailing in Die Attach thru Design of Experiment

2020 ◽  
pp. 44-50
Author(s):  
Michael D. Capili
Keyword(s):  
Production Process ◽  
Design Of Experiment ◽  
Conductive Adhesive ◽  
Fluid State ◽  
Die Attach ◽  
Epoxy Dispensing ◽  
Common Problems ◽  
Adhesive Epoxy

Die attach epoxy dispensing is an automated factory environment that creates some special challenges. A robust production process begins with an understanding of the adhesives in their fluid state and which important parameters must be controlled. One of the most common problems encountered with adhesives in Die attach process is epoxy tailing. Tailing in this sense means the peak of the dispensed material falls away from the center of the dot when the nozzle finishes dispensing. Dispensing requirements, techniques, and equipment resulting from this experience are discussed. Guidelines for optimizing quality is given. In this research, epoxy-associated defects are eliminated by optimizing the Break tail parameter using the Design of Experiment (DOE) methodology. The DOE prediction profile result shows that the tailing parameters recommended is Broken tail delay: 200 ms and Break tail offset is 350 counts. This study is applicable for silver filled conductive adhesive epoxy with greater than 9K Viscosity and greater than 4 Thixotropic Index.

scholarly journals Multivariate Curve Resolution–Alternating Least Squares (MCR-ALS) with Raman Imaging Applied to Lunar Meteorites

2017 ◽  
Vol 72 (3) ◽  
pp. 404-419 ◽  
Author(s):  
Joseph P. Smith ◽  
Frank C. Smith ◽  
Karl S. Booksh
Keyword(s):  
Chemical Composition ◽  
Least Squares ◽  
Raman Imaging ◽  
Alternating Least Squares ◽  
Multivariate Curve Resolution ◽  
Analytical Methodology ◽  
Thin Sections ◽  
Curve Resolution ◽  
Lunar Meteorites ◽  
Adhesive Epoxy

Lunar meteorites provide a more random sampling of the surface of the Moon than do the returned lunar samples, and they provide valuable information to help estimate the chemical composition of the lunar crust, the lunar mantle, and the bulk Moon. As of July 2014, ∼96 lunar meteorites had been documented and ten of these are unbrecciated mare basalts. Using Raman imaging with multivariate curve resolution–alternating least squares (MCR-ALS), we investigated portions of polished thin sections of paired, unbrecciated, mare-basalt lunar meteorites that had been collected from the LaPaz Icefield (LAP) of Antarctica—LAP 02205 and LAP 04841. Polarized light microscopy displays that both meteorites are heterogeneous and consist of polydispersed sized and shaped particles of varying chemical composition. For two distinct probed areas within each meteorite, the individual chemical species and associated chemical maps were elucidated using MCR-ALS applied to Raman hyperspectral images. For LAP 02205, spatially and spectrally resolved clinopyroxene, ilmenite, substrate-adhesive epoxy, and diamond polish were observed within the probed areas. Similarly, for LAP 04841, spatially resolved chemical images with corresponding resolved Raman spectra of clinopyroxene, troilite, a high-temperature polymorph of anorthite, substrate-adhesive epoxy, and diamond polish were generated. In both LAP 02205 and LAP 04841, substrate-adhesive epoxy and diamond polish were more readily observed within fractures/veinlet features. Spectrally diverse clinopyroxenes were resolved in LAP 04841. Factors that allow these resolved clinopyroxenes to be differentiated include crystal orientation, spatially distinct chemical zoning of pyroxene crystals, and/or chemical and molecular composition. The minerals identified using this analytical methodology—clinopyroxene, anorthite, ilmenite, and troilite—are consistent with the results of previous studies of the two meteorites using electron microprobe analysis. To our knowledge, this is the first report of MCR-ALS with Raman imaging used for the investigation of both lunar and other types of meteorites. We have demonstrated the use of multivariate analysis methods, namely MCR-ALS, with Raman imaging to investigate heterogeneous lunar meteorites. Our analytical methodology can be used to elucidate the chemical, molecular, and structural characteristics of phases in a host of complex, heterogeneous geological, geochemical, and extraterrestrial materials.

Micropatterning of Adhesive Epoxy with Embedded Colloidal Quantum Dots for Authentication and Tracing

2021 ◽  
Vol 4 (4) ◽  
pp. 3537-3544
Author(s):  
Romain Platel ◽  
Etienne Palleau ◽  
Louis Vaure ◽  
Simon Raffy ◽  
François Guérin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Colloidal Quantum Dots ◽  
Adhesive Epoxy

Rheological characterization of a novel isotropic conductive adhesive – Epoxy filled with metal-coated polymer spheres

2013 ◽  
Vol 46 ◽  
pp. 784-793 ◽  
Author(s):  
Hoang-Vu Nguyen ◽  
Erik Andreassen ◽  
Helge Kristiansen ◽  
Rolf Johannessen ◽  
Nils Hoivik ◽  
...  
Keyword(s):  
Conductive Adhesive ◽  
Rheological Characterization ◽  
Isotropic Conductive Adhesive ◽  
Polymer Spheres ◽  
Adhesive Epoxy
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