Chromium Hard Mask
Chromium Hard Mask - Related Videos
10:14
Object Substitution Masking
0 Views •
2023
Source: Laboratory of Jonathan Flombaum—Johns Hopkins University Visual masking is a term used by perceptual scientists to refer to a wide range of phenomena in which in an image is presented but not perceived by an observer because of the presentation of a second image. There are several different kinds of masking, many of them relatively intuitive and unsurprising. But one surprising and important type of masking is called Object Substitution Masking. It has been a focus of research in vision...
11:48
Assay for Cell Death: Chromium Release Assay of Cytotoxic Ability
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2023
Source: Frances V. Sjaastad1,2, Whitney Swanson2,3, and Thomas S. Griffith1,2,3,4 1 Microbiology, Immunology, and Cancer Biology Graduate Program, University of Minnesota, Minneapolis, MN 55455 2 Center for Immunology, University of Minnesota, Minneapolis, MN 55455 3 Department of Urology, University of Minnesota, Minneapolis, MN 55455 4 Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455 One of the main functions of the cells of the immune system is to remove target cells...
08:21
Quantitative Hardness Measurement by Instrumented AFM-indentation
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Cited by 6 •
2016
This experimental protocol describes how atomic force microscopy can be used to measure hardness at the true nanometer scale and to detect single atomistic plasticity events.
08:05
Testing Tactile Masking between the Forearms
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Cited by 2 •
2016
Here we explore contralateral tactile masking between the forearms in which tactile detection thresholds are modulated by vibration applied to a remote site. The details of which remote sites have an effect can tell us about how the body is represented in the brain.
08:01
Rockwell Hardness Test and the Effect of Treatment on Steel
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2023
Source: Roberto Leon, Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA Hardness testing is one of the most universally valuable mechanical tests available to engineers, as it is both simple and relatively inexpensive for the wealth of information and data it produces. Hardness testing, generally in the form of a surface penetration test, is both quicker and less destructive than tensile testing. Hardness provides a linear relationship with tensile strength over a...
FAQs
Chromium hard masks maintain feature fidelity because the chromium layer resists chemical and plasma etching, while its dimensional stability helps retain the intended geometry during demanding processing. This combination limits unwanted erosion of protected regions and supports accurate pattern transfer. The result is better preservation of fine features and more repeatable fabrication of miniaturized engineering components.
Strong adhesion helps the chromium film remain attached to the substrate while later chemical or plasma etching occurs. A firmly attached barrier is less likely to lose its protective function over selected regions during processing. This supports consistent transfer of the patterned geometry and helps maintain reliable results across microfabrication steps.
Optical opacity makes chromium suitable for applications in which selected regions must provide a strong optical barrier. In photomask manufacturing, this property complements the film's etch resistance and dimensional stability, allowing the patterned layer to support accurate feature definition. The combined properties make chromium useful where both pattern fidelity and optical blocking are important.
The process begins by depositing a thin chromium film, typically through sputtering or evaporation. Photolithography then defines the intended pattern, followed by selective etching of the chromium layer. The remaining film protects chosen substrate regions during subsequent chemical or plasma etching, enabling the pattern to transfer into the underlying material.
Engineers choose this approach when processing conditions include chemical or plasma etching that could compromise a less durable protective layer. Chromium is particularly useful when high etch resistance, dimensional stability, strong adhesion, or optical opacity is needed. These requirements arise in semiconductor processing, MEMS fabrication, nanostructure production, and photomask manufacturing.
This technique supports accurate, repeatable fabrication by preserving selected regions while the underlying substrate undergoes demanding etching. Its use can help maintain fine feature dimensions and improve pattern-transfer fidelity in miniaturized structures. Consequently, it contributes to manufacturing workflows for semiconductor devices, MEMS components, nanostructures, and photomasks.