[TriEmbed] Surface Mount Components Newbie Questions

Pete Soper pete at soper.us
Fri Apr 4 17:28:33 CDT 2014


I leave those chips in their bags. Inside with the chips are bags of 
desiccants. I'm told that the basic issue is that if the chip absorbs 
much moisture then when it goes through the reflow oven it can 
"popcorn." I don't need to describe what that means. I leave chips like 
this in the bags, then when I'm going to use a fraction of them I put 
the remainder with the desiccant bags into airtight containers with the 
humidity test strips. This may be overkill.

And as I type this I'm about to test out the low tech hood and vent 
system for my oven. This is a very small oven and I have a very powerful 
fan pushing air out of the basement, so hopefully I won't have to run 
the oven outdoors in the near future.
-Pete

On 04/04/2014 04:38 PM, Charles McClelland wrote:
> Hey all,
>
> I am gearing up for my first surface mount project.  OSH Park has just told me the boards are in the mail and DigiKey just sent me the bill of materials.  I have some questions now that I have opened the box from DigiKey:
>
> 1) Some of the components claim to be humidity sensitive.  Is this a big deal for hobby use?  Do I need to keep these in a sealed bag with desiccant or is that overkill?
>
> 2) Some of the components claim to be sensitive to electrostatic discharge.  I have yet to fry a through hold component - are surface mount components more sensitive?
>
> 3) The components come on tape which will be inefficient to store using the cool storage boxes Pete showed me.  Is there anything wrong with removing the parts from the tape?
>
> I went with 0805 components so nothing is microscopic.
>
> Thanks,
>
> Chip
>
>
>
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