Lloyd, 

 

Thank you. Yes I know I have to do the work and I am participating in the webinar.

 

The question was generic in nature to see which document (obsolete or not) those limits originally came from, because right now it seems the numbers were arbitrarily chosen here many years ago. I don’t find it in the old  IPC documents I have so, my research continues.

 

Craig Sullivan

Quality Engineer

IT Administrator

Phone:  (607) 266-0480 x115

Fax:  (607) 266-0482

Email: [log in to unmask]

Web:  www.mplinc.com <http://www.mplinc.com/> 

 

MPL, Inc. 

41 Dutch Mill Road  |  Ithaca  |  NY  |  14850

An ISO 9001:2015 Certified and ITAR Registered Company

IPC member since 2004 

 

 

From: lduso - Diamond-MT.com [mailto:[log in to unmask]] 
Sent: Friday, April 05, 2019 9:37 AM
To: TechNet E-Mail Forum; Craig Sullivan
Subject: Re: [TN] Old cleanliness documentation

 

Craig

 

All the numbers are gone from the IPC. The short answer is, you need to set a limit based on how clean your boards need to be. In other words, you need to do the work to gather the data.

 

Doug Pauls conducted some great classes on the new IPC amendment and will surely be on here shortly to comment as well. I do believe Mike Konrad from Aqueous Technologies is also doing a webinar specifically addressing this on the 16 April.

 

Lloyd Duso

General Manager

Diamond-MT
(814) 535-3505

www.Diamond-mt.com

 

 

On Fri, Apr 5, 2019 at 8:33 AM Craig Sullivan <[log in to unmask]> wrote:

Good Morning Everyone, 



I have inherited the task of monitoring and analyzing our cleanliness
testing process. As I am looking through old records I see cleanliness
pass/fail limits of ~14 ug/in^2 for class 2 and ~6.5 ug/in^2 for class 3.
Can anyone tell me what IPC document this was actually in? I cannot seem to
find it.



I'm changing to match the J-STD-001 limits of 1.56 ug/cm^2 and we've always
been well below any of these "limits", but everyone I have asked has no idea
where the above numbers (14 & 6.5) came from, other than to say "IPC".
Anyone know?



Craig Sullivan

Quality Engineer

IT Administrator

Phone:  (607) 266-0480 x115

Fax:  (607) 266-0482

Email:  <mailto:[log in to unmask]> [log in to unmask]

Web:   <http://www.mplinc.com/> www.mplinc.com



MPL, Inc. 

41 Dutch Mill Road  |  Ithaca  |  NY  |  14850

An ISO 9001:2015 Certified and ITAR Registered Company

IPC member since 2004