Category:PCB PCB Manufacturing

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PCB manufacturing consists of many steps, such as PCB CAM, Panelization, Copper patterning, etc. This group is mainly talked about the problems during PCB manufacturing!

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Copper oxidation Reply 2017-02-28 01:45:19
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Clare

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I faced problem over connecter's pin that were hot air soldered. This connector has 168 pins ( similar to the straddle connector ). The process is to apply the flux onto the connector's J-leads, and the hot air pencil were then ran thru' the leads to melt the pre-deposited solder ( attached to the connector ). Solder joints were perfect but there was a greenish colour residue built up after a few days on the unsoldered leads near the body. I suspect this came from the high soldering hot air temperature setting. I think this it is the copper oxided ( base matreial for the connectors are copper ). I'm not sure, when my customer told me that this could be a corrosion. Could any of you guys tell me what exactly is this greenish thing ? The flux we use is NR330 no clean.
Inputs are welcome.
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Statement: This post is only the personal view of the author and does not represent the opinions of ALLPCB.com.

David Soares

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Awesome post. Like it very much.

CurveAudioDesign

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It is very interesting and helpful.I will keep check your post.

n0xas

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You did a great job. Really appreciate your content.

Sebastian Charlak

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A good piece of info for learning.

Adrian Voroniuc

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Interesting!
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