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Type: Posts; User: Hieu.le

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  1. Replies
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    Closed: Re: White residue after solder mask develope!!!

    Sorry again about the picture
    But we have many many problem with this white residue . You can see, that white color on the annular ring. That the white residue.
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    1,875

    Closed: Re: White residue after solder mask develope!!!

    We have many many prolem with this white residue
    it's not a bright
    You can see, that white color on the annular ring. That the white residue.
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    1,875

    Closed: Re: White residue after solder mask develope!!!

    156930

    picture with the mark. thank your reply
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    Closed: Re: White residue after solder mask develope!!!

    Hi FvM

    Thank you for your reply. Sorry with the picture, I think it's clear enough to see the white residue. I send a picture with a mark, picture below. It's not from plating, we have no damaged...
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    Closed: Re: White residue after solder mask develope!!!

    Hi Brian

    it's not the problem with the plating. As i noted above. I send you picture with a mark, picture below. You can see it's has a white residue on annular ring. The process is : Clean acid...
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    Closed: Re: White residue after solder mask develope!!!

    Hi Klaus

    as you can see, on the Annula Ring, we have some white residue, I mark on picture below. It's happen when we do solder mask -> exposure -> cure (enough time) -> develop soldermask -> test...
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    Closed: White residue after solder mask develope!!!

    Hello, my name is Hieu. I'm a process engineer of PCB manufacturing company.

    We have an issue about white residue on pad. When we doing solder mask and run developer. We check again see the white...
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