Dear Charles: A normally operating CT8 should be able to handle 20 times as much gas as the 12 sccm (0.16 torr-liter/sec) you are using. Your cryopump is...
There are a few questions that come to mind and need to be answered to better understand the issue. 1. When was the cryo pump last regenerated? During...
Dear Charles, Seams you need to properly rebuilt the pump. You may contact Craig Cooper (ccooper@...) Best regards, Angel Hershko Vice...
Angel Hershko
angel@...
May 1, 2006 5:14 pm
3046
48th IUVSTA Workshop (IUVSTA Thin Film Division and Surface Egineering Division) http://www.mfa.kfki.hu/conferences/iuvsta48 AIM OF THE WORKSHOP Organization...
BARNA B. Péter ,Va...
vasco@...
May 2, 2006 2:35 pm
3047
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the PVD_coatings group. File :...
PVD_coatings@yahoogro...
May 2, 2006 2:37 pm
3048
I was wondering if anyone can provide an expected rate of oxidation for Al pads when exposed to air. Also I have heard this is a self limiting process, is...
Dear Adatom, It is true, Al will oxidize when exposed to air in a seconds after it. The oxide layer is two to three monolayers thick. It is selflimiting...
Aluminium is highly reactive and oxidises whilst it is within the vacuum system. Even at metallization pressures there is oxygen present that will bombard each...
Charles A Bishop
cabishopconsulting@...
May 4, 2006 9:32 am
3052
We've been seeing a degradation (pinhole formation) in film stacks of Ti (80 nm) and Al (120 nm) on polyimide. The coatings were done via e-beam, no substrate...
... -- Elvira Fortunato CENIMAT FCT-UNL Campus da Caparica 2829-516 Caparica PORTUGAL Tel: +351212948558 Fax: +351212948558 elvira.fortunato@......
Elvira Fortunato
elvira.fortunato@...
May 4, 2006 9:34 am
3054
We have a Mark II ion gun, made by Commenwealth, running into trouble recently. The cathode emission current in HCES is dropping (less than 3 A) even after I...
We have published reults on that topic: P.B. Barna et. al., Electronmicroscopic and ellipsometric studies on oxidized Al layers, Vacuum 33(1983)93-97, and...
Dave: Back in the day I had similar pinhole problems with thin aluminum layers deposited on flouropolymer underlayers. Eventually we determined that hillock...
Dear Dave, My guess is you are seeing interdiffusion between the two constituents. When aluminum titanium compacts are made via powder metallurgy, they can be...
George Wityak
gwityak@...
May 6, 2006 11:52 am
3058
We were never able to recomend a Common Wealth unit to our customers,due to the power supply problems. The new supply seems to solved the problems . Marion...
Galco123@...
May 6, 2006 11:52 am
3059
as we know tin cans are made of steel the inside of which is coated with thin layer of tin.I wonder how this cathodic coating protection occurs since tin is...
Perhaps researchers in Infrared Multilayer Laboratory in Reading Univeristy, UK, have some experiences. You can visit thier homepage and find many benificial...
The protection provided through tin coating should be defect free for this reason. If you have pinholes in the coating than the steel underlying this coating...
urgen@...
May 9, 2006 3:12 pm
3062
In semiconductor process, the oxide layer of Al pad with VIA of 3um cannot be fully sputtered etch with lower bias voltage but higher bias voltage can remove...
Hi to everyone, I´m working on the tribology of CNx, in the pin-on disk test. I worked with two atmospheres, dry and humid. But I can´t yet explain clearly ...
"Tin coatings are used primarily for protection of food vessels. Although tin is cathodic to steel, tin coatings are so fine and dense that they become...
Dear all, I am working in a project which involves deposition of nano film Diamond like carbon (DLC) on silicon substrate.During the deposition process a lot...
Hi Barna, How to get these results? Question: If these oxide on Al pad not being sputtered etch, and directly sputtered with Aluminium metal of 10kA, any...
Hi Aji, I use Piranaha solution to clean the diamond sample. It can effectively remove the carbon from the surface. So that might work. Good luck. Harish....
It is easier to explain higher friction coeficient. It is stiction which contributes higher friction. Wear mechanism is more complicate. Chemical/physcal...
Hey Aji, try low temperature O2 ( oxygen ) plasma. This is usual technique. Successfully Mike www.biocoats.com...
Multicoats Ltd.
office@...
May 10, 2006 10:42 pm
3071
Dear All, We are performing ballcrater in order to determine the wear rate of DLC films on stainless steel and titanium substrates. However, instead of nice ...
Sergio de Souza Camar...
camargo@...
May 10, 2006 10:42 pm
3072
Hello PVD coatings group. What are the typical necessary minimum and maximum spacings between the cathode and dark space shield for a typical DC sputtering ...
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