What is Deposition: Definition and 32 Discussions

Deposition is the geological process in which sediments, soil and rocks are added to a landform or landmass. Wind, ice, water, and gravity transport previously weathered surface material, which, at the loss of enough kinetic energy in the fluid, is deposited, building up layers of sediment.
Deposition occurs when the forces responsible for sediment transportation are no longer sufficient to overcome the forces of gravity and friction, creating a resistance to motion; this is known as the null-point hypothesis. Deposition can also refer to the buildup of sediment from organically derived matter or chemical processes. For example, chalk is made up partly of the microscopic calcium carbonate skeletons of marine plankton, the deposition of which has induced chemical processes (diagenesis) to deposit further calcium carbonate. Similarly, the formation of coal begins with the deposition of organic material, mainly from plants, in anaerobic conditions.

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  1. LUFER

    What is the Electromagnetic Cross Section in this plasma deposition process?

    What is Electromagnetic Cross Section? (shock section) Hello, I have a question regarding the manufacturing process of electronic components in the case of the silicon deposition and corrosion process. My biggest doubt is the behavior of the plasma interacting in the reactor, I don't know if...
  2. E

    Thin Film Deposition: Carbazole Molecular Glasses Color Change

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  3. W

    High Vacuum Etch / Deposition Vacuum Gauge Question ?

    Hi everybody, this is my 1st post as I am a little stuck. I am putting together a short presentation for a job application and have built a Tool similar to the attached ( basic ) schematic, My question is What is the Purpose of the Active Inverted Magnetron ( AIM ) - ( on the chamber ) and the...
  4. lamejane

    EPVD: Effect of changing the Thin-film Metal deposition Rate

    Hello Material experts out there ! I would like to test a reduced deposition rate for Ni ( 0.3 nm/sec reduced to 0.1 nm/sec) to avoid metal splashes and stabilize the process. This would for sure increase the deposition process time but I'm not quite sure of the Microscopic effects of such a...
  5. A

    ZnO solution/Drop casting deposition

    I want to a make a solution from ZnO powder to deposit a layer on glass substrate by drop casting method. How can i make this solutin?
  6. O

    MCNP neutron energy deposition in water

    Hi, I did an MCNP simulation to see the neutron energy deposition in water. I used 14-MeV neutrons, and big enough water body to make sure all the neutrons stay in the water and give all their energies to water. I used F6 tally. However, I got energy deposition of around 10.3 MeV, not 14 MEV...
  7. R

    Chemical Vapor Deposition - Diamond

    Are there any instructional video's on how to make your own CVD Diamond optics. I was looking online and CVD Diamond wafers are EXTREMELY expensive. Is it possible to make a plasma chamber for CVD if so does anyone have any good text recommendations What is the catch
  8. N

    Can water vapor go directly into a solid

    If water vapor is pulled inwards and cooled at a fast enough rate could if be frozen back into a solid form? i understand that they would have to be froze together as soon as contact is made but if this is possible what would the temperature have to be? And could this be the only thing that can...
  9. M

    Metal thin film adhesion, Au-Si deposition

    What protocol should I use to get a good stable 100nm Au adhesion onto a Si substrate using electron beam evaporation? I've heard talk of primer layers of either Cr or Ti at around 5nm thickness, as the typical way to do it. Which material should I choose? What the advantages or disadvantages...
  10. lamejane

    E-beam Physical Vapour deposition

    Hope we have some PVD specialists in the house :) we have a pfeiffer e-beam PVD in the lab which i use to deposit Ni and Pt thin films ( around 100nm each) on Si wafers. I have always had the problem of "Ni splashes" while heating the target ( with the e beam) which leads to a process stop (...
  11. S

    Atomic Layer Deposition Reactor Design?

    Is it made of quartz or stainless steel/aluminum or what? Does it matter which?that's all I need to know, I just can't seem to find if they can be made of standard vacuum metals or if they have to be quartz. Only really seen some diagrams mention quartz tubes but the pictures of large ones seem...
  12. Ornit

    Ion Assisted Deposition (coating technology)

    Hi all, When talking to some of our optics vendors, I got the impression that Ion Assisted Deposition (IAD) is standard. We use our optics at high power densities and we care about laser damage as well as adhesion and density of the coating (aka porosity, helps reduces sensitivity to humidity)...
  13. J

    Unbiased Physical Vapor Deposition

    I apologize if this seems ignorant, but I am at a loss and I need some assistance. I recently built a small vacuum PVD system (Ion source, argon, target material, substrate cradle, etc.) and was showing it to a colleague when it was noticed that my system was unbiased. It actually didn't occur...
  14. M

    Deposition and Using of information when required

    Hi, there are thousands of firms in the world. Some of them are predominant firms such as samsung, sony and apple. There are thousands of working people in these firms. I would like to understand that how these firms keep the information collected. When they learn a new information, do they...
  15. F

    Deposit Indium Film on Metal Bar - Cheap Prototyping Method

    I want to deposit a layer of indium with a thickness of 10-100 microns on a metal bar. What would be cheap method for prototyping this? I am considering either soldering the indium and then flattening it or using an electron evaporator beam. Any other suggestions?
  16. I

    What is the best approach for layer-by-layer deposition of aluminium oxide?

    Hi I was hoping you could help me a little bit regarding the layer-by-layer deposition process. I have not been able to find a book in my campus library that talks about this particular process, nor have found any "how to" online (must likely haven't searched in the right places), so I come...
  17. F

    Electron Deposition and Object Deflection

    A Big Problem: (a) sub-problem 1: Assuming that a radio transmitter emits a radial pulse 'K' times a second, what would that frequency need to be in order to detect the doppler shift of an object traveling a 6000 m/s? (b) sub-problem 2: If one had a cathode ray source which was outputting an...
  18. J

    Calculating ΔS universe for deposition of iodine QUESTION

    Use the data below to calculate ΔSuniverse for the deposition of iodine at 298 K. ΔfHo (kJ mol–1), ΔS (J K–1 mol–1) I2(s) 0.00 , 116 I2(g) 62 , 261a) –353. J K–1 mol–1 b) –63.1 J K–1 mol–1 c) +63.1 J K–1 mol–1 d) +353 J K–1...
  19. R

    Calculating moleculalar flux from deposition rate.

    I have deposition rate of Silicon dioxide as 1000A/minute. I need to calculate molecular flux to the surface. First I tried to use ideal gas theory but since SiO2 is not ideal gas therefore my answer was completely wrong. I am disoriented. Can anybody help. I know the answer is 3.8E15...
  20. P

    Deposition of salt from evaporated water

    When a small volume, say 5ml, of saturated solution of NaCl is left on a flat surface and evaporates, why does the salt always become concentrated on the outer edge of the base where the solution was? Why doesn't it form a uniform distribution of salt throughout the entire area which the...
  21. S

    Earth Science: Average Rate of Sediment Deposition

    Homework Statement Link of picture that the information below is referring to: http://i56.tinypic.com/283lv.jpg You encounter the sedimentary rock outcrop shown above while you are out hiking. You collect rock samples from points A-D and go back and measure their ages in your isotope lab...
  22. H

    How to transform surface deposition in Bq/m^2 to dose equivalent rate in µS/year

    Dear forum, DOE and MEXT (Japanese Ministry of Education, Culture, Sports, Science and Technology) have pulished the results of common airborne measurements of the http://www.mext.go.jp/component/english/__icsFiles/afieldfile/2011/05/10/1304797_0506.pdf" inside the 80 km zone of Fukushima...
  23. H

    Partial pressure of oxygen during Al deposition

    Homework Statement From Milton Ohrings "Materials science of thin films", problem 3.5. An Al film was deposited at a rate of ~1\mum/min in vacuum at 25°C, and it was estimated that the oxygen content of the film was 10^{-3}. What was the partial pressure of oxygen in the system...
  24. M

    Electrially Insulating Deposition PVD,CVD?

    I'm looking to develop a process for direct deposition of temperature dependent resistive material on a hastelloy or pure nickel substrate. My problem is plating an insulating layer between the two materials. I need the insulation to be fairly robust as it must survive a 500 volt dielectric...
  25. K

    I'm sure deposition is a change from a gas to a solid.

    I'm sure deposition is a change from a gas to a solid. But can someone explain in details.
  26. D

    Tungsten Disulfide Deposition

    I'm looking into using Tungsten disulfide as a lubricant in the form of a thin metal coating. Now I've been made to understand that it can be applied by various methods i.e burnishing, impingement and pulse laser deposited. From what I gather the method of applying this solid lubricant...
  27. R

    News Sibel Edmond's Deposition

    http://www.bradblog.com/?p=7374#more-7374" She has been blocked from testifying multiple times by the Bush administration's Dept. of Justice for nearly eight years by the invocation of the State Secretes Privilege. http://en.wikipedia.org/wiki/State_Secrets_Privilege"
  28. G

    Residual stress induced by metal deposition on cantilever

    hi, everyone, now I am trying to deposite some metal layers on micro-scale cantilever surface on the purpose of bending it under the residual stress caused by metal deposition. I read some literatures which mentioned and even gave the exact value of residual stress happened in both the...
  29. H

    Atomic Layer Deposition question

    Hi all, I'm looking at the ALD process for a uni project and could do with some clarification on a couple of points. Does anyone have any idea what the effect of non-uniform substrate heating would be? Would it harm the chemical bonding and cause ablation? I can't seem to find out from...
  30. C

    Improving Fly Ash Deposition in Horizontal Circular Ducting

    Hi all.. Currently I'm mess up myself with a study of an improvement of incineration fly ash deposition in horizontal circular ducting hapen in my incineration plant. This plant treated the hazardous industrial waste as a fuel using fludised bed reactor and silica sand as an innert...
  31. M

    Theoretical Deposition Rate based on RPM - Help ARRGGG

    Theoretical Deposition Rate based on RPM -- Help ARRGGG! Hey guys, what's going on. I have recently started doing research for a professor here in the field of nanotechnology. It turns out that it's not all small robots and stuff. Right now I'm working with thin film coatings. ANYWAYS, we are...
  32. S

    Acid Deposition: Evidence for Impact on Local Ecosystems

    Which of the following would be the strongest evidence in support of a scientist's contention that a local area was experiencing acid deposition? 1. An increase in the rate of photosynthesis of aquatic plants in a local lake 2. A sudden die-off of all the fish in a local stream 3. A gradual...
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