Science that is transforming lives and enabling the future

Billions of Particles, Countless Fibers, and Nine 9's

All Posts

Billions of Particles, Countless Fibers, and Nine 9's

Here’s a challenge, say the number 9 out loud, nine times.
9, 9, 9, 9, 9, 9, 9, 9, 9.


Figure 1: Filters have been used throughout history to prevent contaminants from reaching people and processes.

That’s easier to read than to say out loud. Nine “9s” represent 99.9999999% gas filter removal efficiency for protecting semiconductor chips during their manufacture. Historically, gas filters have taken on a variety of formats to manage the purity of gases, including the oxygen we breathe. Across their many uses, gas filter purity requirements and capabilities vary. In comparison, an N95 mask is 95% efficient, or 1.5 “9”s.

Why nine, “9s”, billions of minute particles, and countless fibers? The purity requirement of semiconductor gases is 99.9999999%. Entegris’ Rob Zeller walks us through the long history of gas filters and the adaptations of materials, technology, and people to find the purity needed in every aspect of our lives. Small particles and fibers are the foundations of choice for today’s most effective gas filtration solutions.


Learn more about controlling gas contamination www.entegris.com/gas-filters


Related Posts

Reducing our Environmental Impact: How We’re Making Biopharma Manufacturing More Sustainable

Biopharma manufacturing is an essential part of the healthcare industry, producing lifesaving treatments for patients around the world. Traditional manufacturing methods can have a significant environmental impact driven by stainless steel equipment requiring extensive cleaning and sterilization processes that consume substantial amounts of water and energy in addition to cleaning agents.

Achieving the Third Dimension Through Molecular Modeling

For decades, the semiconductor device manufacturing mantra was “How do we make them smaller, cheaper, and faster?” The pursuit of Moore’s Law – the doubling of transistors on a chip every two years – was achieved through planar scaling. But that approach could only go on for so long. The mantra now is “How do we improve power, performance, area, and cost (PPAC)?” At the 14 nm node, it was clear that the best way to push the limits of semiconductor device PPAC was to take it into the third dimension.

Entegris and Agilitech: Transforming Single-Use Technologies

Entegris is delighted to announce our collaboration with Agilitech, a pioneering partner to the biotech industry. Agilitech provides highly flexible, scalable, and future-proof single-use technologies for every step of the bioprocess. These include chromatography systems, mixers, and custom-tailored bioprocess controllers that scale from the laboratory to commercial production environments. This makes them a natural fit for the unique needs of life sciences customers.