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Specialty Chemistry Forums => Other Sciences Question Forum => Topic started by: trankhanh_cr on January 03, 2017, 05:05:58 PM

Title: copper technology in electronic circuit boards
Post by: trankhanh_cr on January 03, 2017, 05:05:58 PM

Hi everyone, I'm learning about copper technology in electronic circuit boards, someone could give me a document on this issue are not. Why copper atoms could be linked to the surface of the material, its link here is.
Thank you for reading.

Title: Re: copper technology in electronic circuit boards
Post by: Borek on January 03, 2017, 05:53:52 PM

I am afraid what you posted doesn't make much sense. Are you using an automatic translator? If so, it has failed.

I would start googling for "laminating pcb with copper".

Title: Re: copper technology in electronic circuit boards
Post by: Enthalpy on January 04, 2017, 10:43:31 AM

Neither am I sure to understand the question.

I've found no definitive information source. I suppose that the copper foils are laminated on the partly cured glass+epoxy composite ("prepreg"), and final curing of the epoxy glues the copper. Though, it seems that much work has been done to improve the adherence of the copper clad, so I can't exclude that an additional glue layer is used.

A manufacturer's website suggests that the copper film is initially thicker, and gets thinned (to 35µm or 70µm for instance) after it holds on the glass+expoxy.

Title: Re: copper technology in electronic circuit boards
Post by: trankhanh_cr on January 05, 2017, 12:26:25 AM

Sorry, i am going rewrite it.
I am finding document for making CCL (copper clad laminate) by Electrodeposition....
Thanks....

Title: Re: copper technology in electronic circuit boards
Post by: DrCMS on January 05, 2017, 03:56:35 AM

You might also want to look up the use of photoresists and etching.

Title: Re: copper technology in electronic circuit boards
Post by: Hunter2 on January 06, 2017, 02:19:27 PM

Quote from: trankhanh_cr on January 05, 2017, 12:26:25 AM

Sorry, i am going rewrite it.
I am finding document for making CCL (copper clad laminate) by Electrodeposition....
Thanks....

Copperclad material is manufactured by electrodepositing on Stainless steel coils.
https://www.rogerscorp.com/documents/749/acs/Copper-Foils-for-High-Frequency-Circuit-Materials.pdf

Title: Re: copper technology in electronic circuit boards
Post by: Enthalpy on January 07, 2017, 07:14:27 PM

The same linked Pdf also cites lamination as a method to produce the copper foil from a billet. No idea which one is more common. Some patents indicate that the rough electrodeposited copper absorbs better the IR light from a laser used to pattern the copper, but this must be a marginal concern.

Whatever the method to obtain a copper film, it must adhere on the epoxy somehow.