I would like a copy!
I have an old copy of the Ellis book, and I talked my daughter into buying one for her reliability work at Sun Power.
If nobody comes up with a file-sharing solution in the next day or two, I'll see if I can research and suggest an appropriate path.
Thanks,
Carl
p.s. Remember . . . in order for something to become clean, something else must become dirty.
Carl B. Van Wormer, P.E., AE7GD
Senior Hardware Engineer
Cipher Engineering LLC
[log in to unmask] https://www.cipherengineering.com/
503-617-7447x303
8295 NE Evergreen Pkwy, Ste 209
Hillsboro, OR 97124-6317
This message may contain confidential and/or proprietary information, and is intended for the person/entity to whom it was originally addressed. Any use by others is strictly prohibited. If I sent this to you by mistake, please be nice and delete it, and then tell me of my mistake so I can send it to the right person.
-----Original Message-----
From: TechNet <[log in to unmask]> On Behalf Of Bev Christian
Sent: Thursday, February 27, 2020 4:19 AM
To: [log in to unmask]
Subject: Re: [TN] [External] Re: [TN] Cleaning Course of Study
Victor,
Yes, certainly. I know Steve has taken down his site and I never used the IPC method, so I don't know how to do that. For a start I will send it to you directly, since TechNet itself does not allow attachments.
Regards,
Bev
-----Original Message-----
From: [log in to unmask] <[log in to unmask]>
Sent: February 27, 2020 6:27 AM
To: [log in to unmask]; [log in to unmask]
Cc: [log in to unmask]
Subject: RE: [TN] [External] Re: [TN] Cleaning Course of Study
Bev,
Can this doc be shared with other forum members?
Victor,
-----Original Message-----
From: TechNet <[log in to unmask]> On Behalf Of Bev Christian
Sent: Wednesday, February 26, 2020 4:18 PM
To: [log in to unmask]
Subject: Re: [TN] [External] Re: [TN] Cleaning Course of Study
[EXTERNAL EMAIL]
Doug,
I will send you a presentation from the university course I teach at the University of Waterloo on Electronics Manufacturing. You have my permission to use as much or little as you chose. It is on CFC elimination, historical, yes, but an important part of the whole story.
Regards,
Bev
-----Original Message-----
From: TechNet <[log in to unmask]> On Behalf Of Douglas Pauls
Sent: Wednesday, February 26, 2020 2:13 PM
To: [log in to unmask]
Subject: Re: [TN] [External] Re: [TN] Cleaning Course of Study
So, what would be an excellent educational topic is how one would arrive at the optimal set of cleaning parameters for a product. Not all cleaning processes are created equal.
*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]
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On Wed, Feb 26, 2020 at 12:34 PM Stadem, Richard D <[log in to unmask]>
wrote:
> Well, there are batch cleaners, and there are batch cleaners.
> I have a TDK inline cleaner here at GD, as well as four other batch
> cleaners.
> The Stoelting batch cleaner I use both here and in Norway are just
> absolutely fantastic. They work really well, albeit they take a little
> longer than the inline cleaner.
> In my nature of work, operators do not get to pick and choose which
> cleaning machine they get to use, however.
> We use a saponified wash process in the batch cleaner at a 5% Bioact
> terpene mix ratio for RMA cleaning, and it works extremely well.
>
> -----Original Message-----
> From: TechNet <[log in to unmask]> On Behalf Of Watson, Howard August
> Sent: Wednesday, February 26, 2020 11:40 AM
> To: [log in to unmask]
> Subject: Re: [TN] [External] Re: [TN] Cleaning Course of Study
>
> Dean,
>
> I like your ideas especially relating to batch cleaners. We got a
> batch cleaner (closed loop) a few years ago, and I think that everyone
> thought it was "plug and play". It didn't yield the results expected,
> and so it just sat there unused. No one trusted it, so they went back
> to solvent bench cleaning.
>
> Thanks,
>
> Howard A. Watson
> __________________________________________
> Intelligence & Space Research Division, ISR-5, TA-03-2322-504 Los
> Alamos National Laboratory
> 30 Bikini Atoll Road, MS B261
> Los Alamos, NM 87545
> Phone: 505-665-3402
> [log in to unmask]
>
>
>
> -----Original Message-----
> From: TechNet <[log in to unmask]> On Behalf Of Stadem, Richard D
> Sent: Wednesday, February 26, 2020 9:56 AM
> To: [log in to unmask]
> Subject: Re: [TN] [External] Re: [TN] Cleaning Course of Study
>
> Some more:
> How a typical DI tank farm or system works, maintenance of the DI
> tanks, chemical treatment for microbial or bacterial issues with the
> municipal water supply. (Ain’t I a fun gi?, LOL) Considerations for
> water use, and the monitoring thereof.
> Local environmental laws, regulations, and ordinances related to
> release of wash water into municipal waste treatment systems, permits
> required, COD testing or other waste testing that may be required, why
> it is a good idea to establish a personal relationship with the local
> environmental waste office and how they are a valuable resource in how
> to deal with spent de-scaling compounds, etc.
> How to safely dispose of salamander eggs, tadpoles, minnows, water
> spiders, LSD, and prohibited weeds from the local water supply.
>
> Which brings me to Maintenance:
>
> Review of the cleaner’s maintenance program, is it up-to-date and is
> it sufficient? Do the PM intervals make sense for daily, monthly,
> yearly or semi-yearly procedures? Is it being performed as defined?
> Does the machine require de-scaling periodically? Are safety
> procedures in place that are applicable to Maintenance (tag-out,
> power-down, personal protective equipment when working around chemical
> de-scaling compounds and other chemicals, etc).
> Proper documentation of daily mix verification or verification of
> water pressure, water temperature, rinse temperature, belt speed, etc.
>
> I’ll keep thinking, I am sure there is more.
>
> Odin
>
>
> From: Douglas Pauls <[log in to unmask]>
> Sent: Wednesday, February 26, 2020 10:30 AM
> To: TechNet E-Mail Forum <[log in to unmask]>; Stadem, Richard D <
> [log in to unmask]>
> Subject: Re: [External] Re: [TN] Cleaning Course of Study
>
> An excellent set of points. Thank you Odin. I especially like #5. A
> corollary would be not to use the reflow oven as a pizza oven.
>
> 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]<
> http://collins.com>
> [log in to unmask]<mailto:
> [log in to unmask]> for all Export Compliant Items
>
>
> On Wed, Feb 26, 2020 at 10:27 AM Stadem, Richard D <
> [log in to unmask]<mailto:[log in to unmask]>> wrote:
> I think it is critical to train in the basic fundamentals, as applicable.
> Handling after the wash is critical;
>
> 1. Ensure a good blow-off of any remaining water is performed, and
> explain that even after a good wash and rinse, CCAs should never be
> allowed to sit with standing water that can evaporate, leaving behind
> white residue in the form of suspended flux particles, minerals, etc.
> This is applicable to most in-line cleaners, perhaps not for many
> batch (non-conveyor) cleaners which typically perform a drying
> function within the chamber at the end of the final rinse. A good
> blow-off or drying cycle takes any remaining contamination off of most of the CCA with the leftover water.
> 2. Never package wet CCAs directly into closed ESD boxes, bags, or
> other packaging. This ensures creep corrosion, etc., etc,.
> 3. A section on saponifier mix verification, typically done with
> in-situ process analyzers, or whatever method the saponifier
> manufacturer recommends. Information on how the ventilation of the
> cleaner can cause changing mix ratio levels, etc 4. Matching of the
> cleaning process for the
> flux(s) used. Considerations to be given to using batch cleaning with
> an appropriate saponifier or solvent for non-water soluble fluxes, and
> perhaps an in-line conveyorized machine for soluble. Or vice-versa,
> dependent on the typical product mix.
> 5. Why the cleaning process should ONLY be used for cleaning fluxes
> and "normal" soils, and not for cleaning carburetors, smocks, removing
> of the wrong adhesive (uncured), cleaning of newly-machined shop
> fixtures/tools covered with silicone-bearing cutting grease or oils.
> 6. Prevention of silicone contamination in general. Nothing like an
> operator cleaning heatsink grease as part of a rework procedure to
> screw up your wash process permanently. Just try coating boards after
> they have been washed in a silicone-contaminated cleaner. Such fun!
>
> I will think of more, whether you like it or not, LOL!
>
> dean
>
>
> -----Original Message-----
> From: TechNet <[log in to unmask]<mailto:[log in to unmask]>> On Behalf Of
> Douglas Pauls
> Sent: Wednesday, February 26, 2020 6:43 AM
> To: [log in to unmask]<mailto:[log in to unmask]>
> Subject: [TN] Cleaning Course of Study
>
> Good morning Technetians
>
> OK, so I have been thinking (and we know how dangerous that is) about
> developing a course of study for someone to become a "cleaning expert".
> Something along the lines of starting with a new hire and educating
> the new hires up to my level. Courses would include things like flux
> chemistry, cleaning processes and chemistry, cleanliness measurement
> methods, SIR methods, etc. What items would you suggest be added to the course of study?
>
> *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]<mailto:[log in to unmask]>
>
> [log in to unmask]<mailto:
> [log in to unmask]> for all Export Compliant Items
>
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