Hi Jack

I would like to agree with Lloyd on this. Define three areas: Must coat, 
Must not coat and don't care. You help everyone out in production and 
avoid impossible scenarios especially when a certain coating is selected 
that just wont meet your specs!

As for how much space the glib answer is as much as possible. The 
practical one is minimum 2mm to give your team a chance on the line with 
the average coating and equipment set up especially if you start to 
consider the odd splash as a fail on inspection. The more space you give 
the less process control and lower cost set up you require.

Best Regards

Dr Lee Hitchens

Please be aware that I am personally based in Thailand and travel frequently due to business.

If I am unavailable you can also contact my offices directly in the UK, USA and India for support.

Mob: +66 95 418 5931
Skype: leehitchens

UK: +44 1226 249 019
India: +91 900 038 3674
USA: +1 206 257 9787

www.conformalcoating.co.uk

SCH Technologies is a Division of SCH Services Limited

On 06/12/2017 22:18, Jack Olson wrote:
> I don't know what staking is, and I think they are trying to avoid
> masking/demasking.
> The goal is to spray everything except the mounting holes and a few exposed
> metal areas that we are using for thermal reasons.
> I was told I need to leave an "overspray zone" as neutral territory between
> those two types of areas
>
> On Wed, Dec 6, 2017 at 9:12 AM, Tan Geok Ang <[log in to unmask]> wrote:
>
>> Staking? Masking / De-masking?
>>
>> ------------------------------
>>
>> *From:* Jack Olson <[log in to unmask]>
>> *Date:* 6 December 2017 at 10:48:41 PM SGT
>> *To:* [log in to unmask] <[log in to unmask]>
>> *Subject:* [TN] IPC-CC-830 (Conformal Coat)
>>
>> What should a designer use as an "overspray zone" for conformal coating?
>> I would like to keep components and vias away from areas that will NOT be
>> coated.
>> I don't know why 3mm sticks in my mind, but I can't find anything in
>> IPC-CC-830 about it
>> (including the new Working Draft)
>> I also downloaded the new Conformal Coat ebook from 007 and can't find it
>> there, either!
>>
> .
>