And Graham, where would one find said Epistle? *Douglas Pauls *| Principal Materials and Process Engr | Advanced Operations Engineering *COLLINS AEROSPACE* 400 Collins Road NE, MS 108-101, Cedar Rapids, IA 52498 USA *Tel:* +1 319 295 2109 | *Mobile: *+1 319 431 3773 [log in to unmask] [log in to unmask] for all Export Compliant Items On Thu, Dec 19, 2019 at 3:36 PM Graham Naisbitt < [log in to unmask]> wrote: > Hi Guy > > As your new VC of the 5-30 committee and new Chair of 5-32b SIR & ECM, I > have taken the liberty of publishing a book on this subject; as much > because I could foresee a lot of questions. There being only a few of us in > a position to answer everyone in the shortest time-frame, I figured that > this would be the fastest and most effective communication tool. > > As some of you might know, a publishing group have been producing many > “industry handbooks” covering a variety of topical subjects. This includes > the latest book: Search: "The Printed Circuit Assemblers Guide to Process > Validation”. > > I respectfully recommend that anyone interested in this significant topic, > might benefit from reading this peer reviewed epistle. Its a FREE download. > > My team and I spent over 5 years collaborating with a global, > multi-national, safety critical and high reliability group, to provide > them, and everyone else, with the necessary know-how as “what to do next”. > > Unlike others, I have more than 25 years assisting, in finite detail, the > complete scope of this topic. We have satisfied users all around the World. > Doug Pauls, et al, are far from being alone. > > I sincerely hope this will direct you to answering your many questions. > > I am available on or off Technet, if you need more. > > Happy Christmas everyone > > Graham Naisbitt > > > On 19 Dec 2019, at 20:17, Guy Ramsey <[log in to unmask]> wrote: > > > > We have been exploring the J-STD-001G amendment. > > We think we have a "qualified" process because: > > 1. We have monitored our process for several years and established an > > action threshold at a level that is much lower than the old IPC limit. > > Because with know the "normal" ROSE test result from or Ionograph. > > 2. We have never seen evidence of corrosion on assemblies returned from > the > > field. And have no reports of corrosion from customers. > > > > But, we have not done any SIR testing in years. The mix of parts and part > > densities have changed dramatically. We have no reason to trust the old > SIR > > test results. > > We would like to gather objective evidence that our cleaning process is > > compliant. > > > > Any experience out there with the Magnalytix system? > > Any advice about test coupon selection? > > Anyone? >