Hi Joyce

Thanks for your feedback, we are analyzed to understated how the internal parts are in contact with the coating

Regards
Angel Reyes
619 661 4429

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Yuan-chia Joyce Koo
Sent: Tuesday, January 26, 2021 6:36 AM
To: [log in to unmask]
Subject: Re: [TN] Conformal coating applied on SMT SW leads recommendation

https://dymax.com/products/equipment/light-curing-equipment/system-
accessories/liquid-light-guides/light-guides/
you can easily control the flow if done properly at your sensitive
location- just be careful not over cure coating - it will turn yellow and flaky...
jk
On Jan 25, 2021, at 8:06 PM, Yuan-chia Joyce Koo wrote:

> my question is how the conformal coat get into metal contact 
> internally (something must be sitting around for a while?).  UV 
> curable with proper lamp (special lamp machine) can control well to 
> limit coating flow (material characteristic plus lamp power and 
> geometry).  Application engineer of your coating supply might provide 
> you with recommendation (photo initiator absorption spectrum must 
> match with curing lamp. for example).  there are high end of UV curing 
> machine can be programmed to limited flow (localized curing).  But 
> that is extra step and cost you money for sure.  those programmable 
> curing  machine is not cheap either - they are used for (a) dentist or 
> medical application (b) optical components as both coating or adhesive 
> bonding.  IMHO.
> Doug might have better solutions - if you buy him Mountain Dew ;-).
> best of luck.
> jk
> On Jan 25, 2021, at 5:44 PM, Reyes, Angel LAM2 4429 wrote:
>
>> Hi Joyce
>>
>> I need to prevent contamination on field by humidity and salt 
>> moisture ingress across the SW leads (close 0.04" separation), issue 
>> is to have electrical conductivity or intermittence external between 
>> leads solder joint.
>>
>> Regards
>> Angel
>>
>>
>> -----Original Message-----
>> From: Yuan-chia Joyce Koo [mailto:[log in to unmask]]
>> Sent: Monday, January 25, 2021 2:13 PM
>> To: TechNet E-Mail Forum <[log in to unmask]>; Reyes, Angel LAM2 4429 
>> <[log in to unmask]>
>> Subject: Re: [TN] Conformal coating applied on SMT SW leads 
>> recommendation
>> Importance: High
>>
>> why your SW got open for conformal coat?  prototype?  module level?
>> just curious.
>> jk
>> On Jan 25, 2021, at 11:26 AM, Reyes, Angel LAM2 4429 wrote:
>>
>>> Hi all
>>>
>>> Any recommendation for conformal coating UV cure to be applied by 
>>> robot on SMT SW leads, we tried DYMAX EMAX 99003 but did not work 
>>> material migrate by capillarity inside SW and internal metal contact 
>>> parts were electrical isolated
>>>
>>> Angel Reyes
>>> 619 661 4429