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Cleaning of Entek Boards

computer

#20744

Cleaning of Entek Boards | 18 July, 2002

Hi, Currently my company is running entek coated boards. But whenever there is a misprint, we cannot wash the boards as it would diminish the coating. Is there anyway to clean the boards without removing the coating or is there a way to re-coat the entek layer ?? Please advise.

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#20783

Cleaning of Entek Boards | 18 July, 2002

So, why can't you clean misprints on Entek boards?

Entek: Cheap, flat, OK shelf life, not without process and fabrication issues.

Your Entek organic solderability protection is probably Entek Plus [CU106A] made by Ethone OMI. Consider getting a copy of �Reflow and Wave Soldering of ENTEK PLUS-Coated PWBs: Answers to Key Assembly Issues� from Ethone. It will probably say something like �

�Wipe-down/Cleaning of Misprinted Solder Paste The ENTEK PLUS coating is soluble to varying degrees in most solvents, acids, or base materials. Any solvent used to clean solder paste off of PWB will solubilize or remove some portion of the ENTEK PLUS coating. The amount of removal depends on the strength of the cleaning material. Remove the majority of paste using a spatula. Using a solvent appropriate for the paste system, adjust the cleaner temperature and concentration to lowest possible levels and still solubilize the paste residue. For optimum results, reprocess PWB within 24 hours.�

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computer

#20784

Cleaning of Entek Boards | 18 July, 2002

Hi Dave, I read the same article as you. But that method leaves solder balls in via holes or traces of it remains on the boards. I am using ultrasonic with solvent for cleaning misprint boards. Apprarently, they have adverse affect to the entek coating. Can I ask is there a way to re-coat in the SMT line

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