Pressure Sensitive Tapes – Page 2

Al Vs Cu

Traditionally, IC interconnects formed from Al; however due to scaling and performances needs, Copper is gradually replacing Aluminum.

Photo elastic modulator (PEM) is one the critical components in a phase modulated ellipsometer, which modulates phase and amplitude changes in detected signal, based on that Psi and Delta will be measured and n, k, d, and others accordingly in principle.

Transmittance/Haze/Clarity measurement-ASTM D 1003

As a simplified view, light is incident upon a sample, three processes occur: transmission, absorption, and reflection, as schematically shown in the follow figure, including retroflection, diffuse reflection, specular reflection, diffuse transmission, and specular transmission.

Coating Defects Inspection Resolution

Surface defects inspection is an important step to in-line detect coating defects such as voids, streaks, clumps, bubbles, scratches etc. in continuous web coating and similar processes. It provides evidences for process optimization, root cause analysis, as well as quality control/assurance.

OCA for good gap filling

Patent application, WO 2017/058499 Al, teaches a method to formulate OCA with good gap filling property for display applications.

Foam compression set

Compression set is an important parameter to evaluate the foam’s permanent deflection which determines the long term performances,. e.g. sealing, isolation.

A method to reduce nodules on ED copper foil

ED copper foil is broadly used in Li-ion battery and printed circuit boards in electronics industry. However, nodules are commonly observed on the surface of ED copper foil made through a conventional electro-deposition method. Patent of US 9,562.298 B2 teaches a new way to reduce the number of the nodules on the surface.

Study the curing reaction of silicone release agent through FTIR

In PSA industry, release liner is one of the key components. The main functions of release liner are to provide protection of the adhesive layer during storage and transportation, and ensure a residue-free removal from the protected adhesive layer without damaging or contaminating it.

Silicone FTIR

The paper, titled with Characterization of Surface Treatments of Cork Stoppers by FTIR-ATR and published in J. Agric. Food Chem. 2006,54, 4932-4936, proposed an analytical method for identification of the presence of surface treatments in cork stoppers. The information about the FTIR bands for silicone is quite useful.

initiators

In optically clear adhesive synthesis, free radical initiators can be photoinitators or thermal initiators. The amount of the free radical initiator is often in a range of 0.05 to 5 weight percent based on a total weight of monomers used. The following are some examples of initiators including both thermal and photo-initiators: