The metal appearance on the termination depends on the production process (cheap process) of the chip component (termination). This is a really cheap component, which i can see, with a major tollerance. If you want to know more about the different processes how a chip (termination) is made, than please send me an email and i will provide you a .pdf file explaining the different processes.

Kind regards,

Ramon Essers
ETECH-trainingen

(Send on The road with iPhone)

> Op 27 sep. 2014 om 03:24 heeft Yuan-chia Joyce Koo <[log in to unmask]> het volgende geschreven:
> 
> something is not right.  the metal termination should be the only one that is wet to the solder, not the ink or protective layer of the resistor material.  those are non-wettable to the solder (if the material selection were done correctly).  however, the silk screen if not cure properly, you might change the surface characteristic of the material.  The metal termination also showed somewhat layer appearance - a bit strange.  I would cross section and check the underline metallization and see if it is extremely thin or fragmented.  that just me... curious... is it 01005 or 0201?  my 1.8 cents.
>            jk
>> On Sep 26, 2014, at 3:20 PM, David Hillman wrote:
>> 
>> Hi Jim - I don't think that that extra bit of solder is going to cause any
>> solder joint integrity issues and is a low risk for corrosion/dendrite
>> issues but clearly the vendor had a process issue which is going to and is
>> causing you process issues. Depending on the size of the population, I
>> would consider replacing the parts depending on the product use environment
>> and expected longevity of the product.
>> 
>> Dave Hillman
>> Rockwell Collins
>> [log in to unmask]
>> 
>>> On Fri, Sep 26, 2014 at 12:56 PM, Jim West <[log in to unmask]> wrote:
>>> 
>>> The solder is directly on top of the silkscreen marking.  The solder
>>> covering the resistor terminations is part of the chip manufacturing
>>> process.  A little sloppy and something that I have not come across before.
>>> 
>>> Other thoughts?
>>> 
>>> 
>>> Jim
>>> 

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