Equipment
Airborne Molecular Contamination Part 3 - Head It Off
By Barbara Kanegsberg, Ed Kanegsberg
AMC can be a “silent poisoner” of your process. Poisons sap strength — including product quality and profits.
Biological Safety Cabinets: Controlling Contamination
By David Phillips
In order to maximize productivity while maintaining the highest level of safety, biosafety cabinets have become a crucial component.
Far From Nano: Hepa-Filtered Industrial Vacuums Help Solve Critical Safety Concerns
By Paul Miller
Because nanoparticles follow airstreams, vacuums are an effective and efficient tool for protecting nanomanufacturers. HEPA filters will collect 99.97% of particles down to and including 0.3 microns.
Airborne Security
By Frank Stamatatos, Aaron Ayer
Particles in a cleanroom environment must be removed. Particles that can reproduce themselves can become a difficult part of the problem to address.
Tutorial on HEPA Filtration
By Jason Kelly
HEPA filters are used in cleanrooms in many different industries, including semiconductor, pharmaceutical medical devices, nuclear, and biotechnology.
Chemical Filtration Strategies For The Control of Airborne Molecular Contamination, Part 2
By Christopher Muller, Brad Stanley
It is well known that a single chemical filter medium may not adequately control multiple contaminants or all classes of AMC. The types and numbers of AMC that one would encounter make it likely that air-cleaning systems need to be equipped with multiple stages of specialized chemical filter media.
Chemical Filtration Strategies For The Control of Airborne Molecular Contamination, Part 1
By Christopher Muller, Brad Stanley
AMC continues to grow as a major contamination control issue for microelectronics manufacturers. Because of this, chemical filter manufacturers are offering a large number of AMC control options from which the contamination control engineer must determine which is the best solution.
New Closed-Loop Controls For Minienvironments
By Howard Abramowitz
Often, to ease cost constraints, there is a growing placement of higher purity cleanroom minienvironments inside a larger ballroom space.
Nanotube Filters
By Barbara Kanegsberg, Ed Kanegsberg
Currently available filters have limitations; Nanotube-based filters have the potential to address these limitations.
Point of View: The More They Remain The Same
By Raymond K. Scheider
The perplexing picture painted by our background investigation of the metals lab facility described in our last issue came even more into focus during our walk-thru inspection. The “metal-free” lab had HEPA filters with aluminum separators.
Air Filtration at High Temperatures
By Thomas E. Myers, Hans L. Melgaard
Air filtration at elevated temperatures presents multiple challenges in filter performance and filter integrity testing. Many standard cleanroom practices and HEPA filter test procedures do not work, and some may result in hazardous operation of equipment.
Smart Fan Filter Units
By Scott Moore
Fan Filter Units (FFUs) are becoming increasingly popular because of the flexibility they afford. Traditional central air handling units (AHU), used in combination with lay-in HEPA or ULPA filters, are becoming a thing of the past.
Minimizing VOC Emissions during Photochemical Filter Change-Out
By Alicia Briggs
While exposure risks have been minimized over the past decade, VOC emissions still warrant diligent attention in the workplace.