Hello Friends
The copper deposited layer on ceramic material becomes oxidized in the presence of environment oxygen. The oxidized copper is non conductive in nature. The layer of pure copper is necessary to open for the radiation purpose. How can safe and protect the copper layer for environment. Kindly share your best suggestion.
You can apply a thin layer (1-2 micrometers) of gold to your copper layer using electroplate or PVD (instead of gold you can use palladium, platinum or rhodium).
You want to protect a copper layer from oxidation by environmental oxygen.
How thick is the copper layer? What is the ceramic substrate? The substrate might enhance oxidation.
What do you mean by for radiation purpose? Radiation from the copper or the copper is to collect radiation? Is the copper for electrical conduction or heat conduction?
What temperature is the copper during operation?
Can you exclude oxygen from the environment?
A solution might be to use gold instead of copper.
Hello Joseph L Alvarez. My deposited copper layer on ferrite substrate is approximately 1 to 2 micrometers. This copper layer doing work as microwave radiator at room temperature. I cannot exclude oxygen from environment but some methods are possible to protect this copper layer. So simply, I ask these method.
I am agree with Sir, Vadim Verlotski. This could best solution from copper oxidized. Gold coated layer on copper will protect enhanced the electric conductivity.
Deposit a 1 - 2-um layer of gold instead of the copper. A bilayer of copper and gold is a complication.
You could deposit an organic insulating varnish on the copper and ferrite, if the operating temperature is less than the varnish breakdown. A very thin layer is possible by diluting the varnish.
Dear Sir Joseph L Alvarez if you put varnish on the top surface on copper it affects the process of radiation. The properties of mutual reflection and absorption will be increased within the systems and mostly power will be storage in side the body. So varnish never allow on the surface.
Dear Sir Joseph
If you work in the field of radiation sensors or detectors
the aluminum and copper oxides are sensitive to radiation.
Dear Mr. Singh,
I designed circuits and used copper in circuit boards. To prevent it from oxidizing, I used varnish (type GE9654). I designed the circuits. The components were mounted on a double face copper board. After electronic tests I cover only test points and then"painted" with varnish the rest of the circuit board. This prevented it from oxidizing
Anoop
The wavelength will determine the amount of reflection and absorption. As you have not indicated the wavelength it is not possible to comment. A best thickness can be determined, but very thin layers are possible using varnish or paraffin that will not appreciably degrade the performance. Otherwise, use gold instead of copper.
L. Carlos Reina Sir!
Your work is very similar to mine. I am designing copper circuit on both side of board frame. The open area surface of circuit board used as radiator source which radiates signal into free space. If open area covered with varnish, the radiation pattern changed. So, kindly told me ,Your varnish (Type GE9654) is conducting or non conducting in nature ??.
Hello J. L Alvarez @ Sir
I am agree with your answer "The reflection and absorption are the characteristic of wavelength of the incident wave. In my work transmission is important than others. The thickness of the copper layer change with frequency. Thin layer of copper could not preserved from environment. You gave me best suggestion to use gold. So, thank you sir.
Dear Mr. Singh,
I can assure you that this varnish protects your copper board from oxidizing and protect your components. This varnish is non conducting (electric current). I did not test it as radiatior source into free space.
can you work under vacuum system, bot your board inside evacuated glass valve and handle it under radiation dosses.
or use gold instead of copper.
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