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Author Topic: [Solved] What kind of PCB coating is this?  (Read 1740 times)

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Offline lain.caiTopic starter

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[Solved] What kind of PCB coating is this?
« on: March 12, 2014, 06:10:40 pm »
I've found these black coatings on iPhone and Misfit Shine PCB; what are they and what are they used for?



« Last Edit: March 12, 2014, 06:21:29 pm by lain.cai »
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Offline free_electron

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Re: What kind of PCB coating is this?
« Reply #1 on: March 12, 2014, 06:18:14 pm »
That is underfill. They use that to mechanically strengthen the BGA to board mounting.
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Offline lain.caiTopic starter

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Re: What kind of PCB coating is this?
« Reply #2 on: March 12, 2014, 06:21:12 pm »
Quote from: free_electron on March 12, 2014, 06:18:14 pm
That is underfill. They use that to mechanically strengthen the BGA to board mounting.

I see! Thank you so much :)
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