Navigation Links
Laminar-flow cleanroom inventor honored posthumously by National Inventors Hall of Fame
Date:3/4/2014

orian Rebecca Ullrich said. The practice at the time was to tightly seal cleanrooms, wear protective clothing and vacuum often, but still contaminants entered the room and particles interfered with the precise work.

Whitfield's solution was to constantly flush out or "sweep" a room with highly filtered air. In an initial model, Whitfield designed a workbench along one wall. Clean air entered the room from a bank of filters that were 99.97 percent efficient in removing particles larger than 0.3 microns. For example, cigarette smoke blown in one side comes out the other as clean air.

The air was circulated in the room at a rate of 4,000 cubic feet or about 10 changes of air per minute. The resulting linear speed of the air is slightly more than 1 mph, which is about the same as that felt walking through a still room.

In a later modification, the air was passed down over the work area instead of across, letting gravity help carry troublesome particles into the floor, which was covered with grating. Filters underneath clean the air and it is circulated back around to re-enter the room.

Disbelief, then wonder as invention was announced

When the first cleanroom was tested instruments that counted the dust particles registered zero, causing Whitfield and others to assume they were broken, Whitfield said in 1993.

The laminar-flow cleanroom created a work environment that was more than 1,000 times cleaner than the cleanrooms in use at the time. According to tests at the time, the laminar-flow cleanroom's work area contained an average of 750 dust particles one-third of a micron in size or larger per cubic foot of air. (A micron is equal to 40-millionths of an inch.) That's compared to average dust counts of more than 1 million particles per cubic foot of air in one of the best conventional cleanrooms in use at the time.

RCA and General Motors Co. were early adopters of the cleanroom, and the predecessor to
'/>"/>

Contact: Heather Clark
hclark@sandia.gov
505-844-3511
DOE/Sandia National Laboratories
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. Inventor honored for bridging innovation and humanitarianism to help millions globally
2. NSF-funded inventory of mega-diverse insect order now underway
3. National Academy of Inventors names four UT Arlington professors as charter fellows
4. Barbara Gilchrest named 2012 Charter Fellow by National Academy of Inventors
5. Ben-Gurion U. establishes stem cell research fund in honor of inventor Jordan Baruch
6. National Academy of Inventors honors 3 University of Houston professors
7. New National Inventors Hall of Fame inductees received vital NSF support
8. Ophthalmologist Inventors of Human Identification Technology Inducted into National Inventors Hall of Fame
9. Wyss Institute at Harvard University announces election of 2 faculty to Natl Academy of Inventors
10. University of Tennessee vice chancellor named National Academy of Inventors Fellow
11. Kurt H. Becker Named a Fellow of the National Academy of Inventors
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Laminar-flow cleanroom inventor honored posthumously by National Inventors Hall of Fame
(Date:8/29/2014)... repeated climatic shifts over the last 120,000 years ... a team of researchers led by City College ... a new biodiversity metric called "phylogeographic endemism." , ... variation within species is restricted in geographical space. ... and 14 other researchers from institutions in Brazil, ...
(Date:8/29/2014)... German . ... considered the oldest form of communication. Acting as messenger ... the sexual attraction between males and females. Fish rely ... reproductive behavior in males and females. Scientists at the ... in Faro, Portugal, and at the Max Planck Institute ...
(Date:8/29/2014)... them: modern materials that are light, flexible and highly ... or electronic paper. , Making such concepts affordable enough ... way of working with copper nanowires and a PVA ... success in the field of ultra-lightweight "aerogel monoliths" has ... silver nanowires. , By turning instead to copper, ...
Breaking Biology News(10 mins):CCNY team defines new biodiversity metric 2Ready for mating at the right time 2Ready for mating at the right time 3Copper shines as flexible conductor 2
... -- Mimicking the human nervous system for bionic applications could ... at Oak Ridge National Laboratory to process carbon nanotubes. ... them attractive to use as artificial neural bundles in prosthetic ... fibers to match that of a real neuron bundle. With ...
... Mich.---Heating and squishing microalgae in a pressure-cooker can fast-forward ... University of Michigan professors are working to understand and ... development of affordable biofuels that could replace fossil fuels ... the possibility of other new fuel sources such as ...
... famous by Charles Darwin, have a unique biota now ... and population growth. Indeed, alien or exotic insects today ... of these insect invaders is the cottony cushion scale, ... of infesting many woody ornamentals and crops, the cottony ...
Cached Biology News:New ORNL carbon composite holds promise for bionics 2Pressure-cooking algae into a better biofuel 2UC Riverside entomologists say biocontrol of insect pest in the Galapagos Islands is a major success 2UC Riverside entomologists say biocontrol of insect pest in the Galapagos Islands is a major success 3
(Date:8/29/2014)... A major challenge before new biotechnology start-up ... of Boston-Cambridge, is gaining visibility that can lead to ... Director of Boston’s Adult Stem Cell Technology Center, LLC ... of his company an important priority since he started ... a social media marketing campaign launched earlier ...
(Date:8/28/2014)... Ca. (PRWEB) August 28, 2014 Best ... rating for an alcohol-based hand sanitizer, asks food processors ... by comparing the hand sanitizer they’re currently using to ... . Hand hygiene is critical to fighting cross-contamination and ... Best Sanitizers believes there are key criteria that ...
(Date:8/28/2014)... YORK , Aug. 28, ... that a new market research ... catalogue: Whole Exome ... Kits (Library Preparation, Target Enrichment), ... (Sequencing by Synthesis), by Application ...
(Date:8/28/2014)... WA (PRWEB) August 28, 2014 Sterlitech ... Filtration’s polymeric membranes to its stable of products ... available molecular weight cut-offs and include membrane filters with ... steady increase in customer demand for our membrane process ... greater variety of flat sheet membranes,” explains Sterlitech President ...
Breaking Biology Technology:The Adult Stem Cell Technology Center, LLC Participates in Multiple Stem Cell and Regenerative Medicine Conferences Before Year End 2The Adult Stem Cell Technology Center, LLC Participates in Multiple Stem Cell and Regenerative Medicine Conferences Before Year End 3The Adult Stem Cell Technology Center, LLC Participates in Multiple Stem Cell and Regenerative Medicine Conferences Before Year End 4Food Processors and Food Handlers are Encouraged to Prepare for Fall Harvest by Evaluating Their Current Hand Sanitizer Using Nine Key Criteria 2Food Processors and Food Handlers are Encouraged to Prepare for Fall Harvest by Evaluating Their Current Hand Sanitizer Using Nine Key Criteria 3Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 2Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 3Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 4Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 5Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 6Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 7Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 8Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 9Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 10Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 11Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 12Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 13Sterlitech Corporation Enhances Its Selection of Flat Sheet Membrane Filters 2
... organizations simplifies, the creation, review and preparation ... YORK, Feb. 5 Intrasphere Technologies, a ... solutions to,life sciences organizations, announced today that ... by Microsoft Office,SharePoint Server 2007 now offers ...
... Genta,Incorporated (Nasdaq: GNTA ) announced today that the ... Jr., will provide a,company overview and update of corporate ... is scheduled for Wednesday, February,13th at 3:30 pm ET ... About Genta, Genta Incorporated is a biopharmaceutical company ...
... Earn a 23%,Patient Share in the United States, According to a New ... ... Mass., Feb. 5 Decision Resources, one of the,world,s leading research and ... on delaying the progression,from mild cognitive impairment to Alzheimer,s disease is the ...
Cached Biology Technology:Intrasphere Technologies Releases PharmaCM Submissions Management and Authoring Module Powered by Microsoft Office SharePoint Server 2007 2Intrasphere Technologies Releases PharmaCM Submissions Management and Authoring Module Powered by Microsoft Office SharePoint Server 2007 3Genta Incorporated to Present at the BIO CEO & Investor Conference 2Genta Incorporated to Present at the BIO CEO & Investor Conference 3Flurizan's Effect in Delaying Progression From Mild Cognitive Impairment to Alzheimer's Disease is Superior to That of Aricept 2
... Ideal for staining westerns and includes stickers ... Pour spouts in each corner facilitate pouring ... be used for identification. Lid is designed ... for staining several gels simultaneously. Lid also ...
ID clarifier: non-treated with lid...
... Staccato Series of systems provide fast and reliable scalable ... drug development laboratories. Staccato systems are available in three ... Systems Series. ... All Staccato ...
... Staccato Custom Series Systems provide ... drug discovery, genomics, proteomics and drug ... built specifically to customer specifications, providing ... individual needs. Staccato Custom Systems ...
Biology Products: