Happy Friday and watch out your GPS on Sat... http://www.msn.com/en-
us/news/technology/heres-why-your-gps-could-go-haywire-this-weekend/
ar-BBVDtJ9
;-)
jk
On Apr 5, 2019, at 4:43 PM, Decker, Scott Collins wrote:
> "So THAT's a Matador!" I'll bet you remember that one too. Remember
> one of the commercials for it? The couple would come out of the
> restaurant and ask the valet to get the white Matador .The valet
> brought 2 or 3 white cars around, but none were the correct cars
> until he gets the right one. As the people drive off, the valet
> says "So That's a Matador..."
>
> So picture sitting in my dad's truck on a pretty warm day in
> Lancaster/Palmdale California, the windows are both down in the
> truck, I'm in the passenger seat and stopped at a signal. What
> pulls up next to me? None other than one of Palmdale's finest, who
> just happened to have his window down too. (Are you ready for it?)
> I looked over and slightly down to the police car and said, "Oh, So
> THAT's A Matador"... The light changed green and I just remember
> the cop putting his head down on the steering wheel, watching him
> shake his head and that's the last time I saw him... I mean, What?
>
> Happy Friday everyone...
>
> Scott Decker | Senior Engineer, PCB Design Services CID+ |
> Electronic Systems Center
> COLLINS AEROSPACE
> 3445 S. 5th Street, Suite 170, Phoenix, AZ 85040 U.S.A.
> Tel: 602 308 5957 FAX: 602 243 2347
> [log in to unmask] www.collinsaerospace.com
>
> CONFIDENTIALITY WARNING: This message may contain proprietary and/
> or privileged information of
> Collins Aerospace Systems and its affiliated companies. If you are
> not the intended recipient please 1) do not disclose, copy,
> distribute or use this message or its contents, 2) advise the
> sender by return e-mail, and 3) delete all copies (including all
> attachments) from your computer. Your cooperation is greatly
> appreciated.
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of lduso - Diamond-
> MT.com
> Sent: Friday, April 5, 2019 11:01 AM
> To: [log in to unmask]
> Subject: Re: [TN] [External] Re: [TN] Old cleanliness documentation
>
> Ahhh, that explains so much. Why do I picture an AMC Gremlin?
>
> On Fri, Apr 5, 2019, 10:54 David Hillman
> <[log in to unmask]> wrote:
>
>> Rumor has it Doug had a Mt. Dew still in the trunk of his car.....
>> but
>> that was just a rumor.
>>
>> Dave
>>
>> On Fri, Apr 5, 2019 at 12:53 PM lduso - Diamond-MT.com <
>> [log in to unmask]> wrote:
>>
>>> Wow, that's back in the day. Great back story. Was Mt. Dew even sold
>>> over the counter then? Or did you have to "know a guy"?
>>>
>>> On Fri, Apr 5, 2019, 10:25 Douglas Pauls <
>>> [log in to unmask]> wrote:
>>>
>>>> Well Craig, sit back, pull up a beer and listen as I hearken back
>>>> to
>>> days
>>>> of Yore.
>>>>
>>>> Back in the 1970s, there were no measures of assembly cleanliness
>>>> and
>>> the
>>>> military, specifically the Navy, was having fits with corrosion on
>>>> assemblies. The Navy tasked Bob Denoon and Bill Hobson, of the
>>>> Naval Avionics Center in Indianapolis, to develop a test. It was
>>>> my good
>>> fortune
>>>> to have Bill and Bob as two of my earlier mentors. They took a
>>>> mixture
>>> of
>>>> 75% isopropanol (a non-polar solvent) and 25% deionized water (a
>>>> polar solvent), ran it through a mixed bed deionizing cartridge to
>>>> a high resistivity level, then poured it over a candidate assembly,
>>>> gathering
>>> the
>>>> run off in a beaker. They then measured the resistivity using the
>>> theory
>>>> that any easily ionizable materials would be dissolved into
>>>> solution, dropping the resistivity. They benchmarked the drop in
>>>> resistivity
>>> against
>>>> the amount of an easily ionizable salt, NaCl, that it would take to
>>>> make and equivalent drop in resistivity. It worked.
>>>>
>>>> Further work by Bill and Bob, using SIR testing, showed that IN
>>>> GENERAL, when you were over 10.06 micrograms of sodium chloride
>>>> equivalence, you
>>> had
>>>> good SIR and if below that value, you had poor SIR. They had
>>>> always intended this test as a process control method and not one
>>>> for product acceptance. Out of this work, together with Jack Brous
>>>> of Alpha Metals, came the first ionic cleanliness tester. Others
>>>> followed, each with
>>> their
>>>> own pass-fail level. This test, which came to be called ROSE, was
>>>> put
>>> into
>>>> IPC-TM-650, method 2.3.25.
>>>>
>>>> As Lloyd indicated, those values obtained 40 years ago with a
>>>> completely different material set, are no longer valid and haven't
>>>> been for a long time. It just took us a while to fix J-STD-001.
>>>>
>>>> I think you will enjoy Mike's webinars. I usually listen in and
>>>> always find out something new.
>>>>
>>>> *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]
>>>>
>>>>
>>>> On Fri, Apr 5, 2019 at 3:51 PM Craig Sullivan
>>>> <[log in to unmask]>
>>>> wrote:
>>>>
>>>>> 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:
>>>>>
>>>>
>>> https://urldefense.proofpoint.com/v2/url?
>>> u=http-3A__www.mplinc.com&d=
>>> DwIFaQ&c=ilBQI1lupc9Y65XwNblLtw&r=lTRDjB8ojaf7ZaJ9DHeDAm7e-
>>> HFP9fxIkv6
>>> fRnV49HE&m=DpuKw60ajx9DXVwXVVotAbqTtfMgqbAGnV7C3-
>>> u9Q9c&s=xZhzOVJIK-z_
>>> WJU-f8-owFf6Ii5FzxT-j0YYc9RBbtM&e=
>>>>> <
>>>>>
>>>>
>>> https://urldefense.proofpoint.com/v2/url?
>>> u=http-3A__www.mplinc.com_&d
>>> =DwIFaQ&c=ilBQI1lupc9Y65XwNblLtw&r=lTRDjB8ojaf7ZaJ9DHeDAm7e-
>>> HFP9fxIkv
>>> 6fRnV49HE&m=DpuKw60ajx9DXVwXVVotAbqTtfMgqbAGnV7C3-
>>> u9Q9c&s=kWsQdITvkDR
>>> fi539OTxC_UCHQpGwmRZfqsvWJu29qbY&e=
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> 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
>>>>>
>>>>>
>>>>>
>>>>
>>> https://urldefense.proofpoint.com/v2/url?
>>> u=http-3A__www.Diamond-2Dmt.
>>> com&d=DwIFaQ&c=ilBQI1lupc9Y65XwNblLtw&r=lTRDjB8ojaf7ZaJ9DHeDAm7e-
>>> HFP9
>>> fxIkv6fRnV49HE&m=DpuKw60ajx9DXVwXVVotAbqTtfMgqbAGnV7C3-
>>> u9Q9c&s=fhYK-p
>>> -Y155z9_CRg4XxuULyIj54zvSVl_YxEnfIutA&e=
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> 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: <
>>>>>
>>>>
>>> https://urldefense.proofpoint.com/v2/url?
>>> u=http-3A__www.mplinc.com_&d
>>> =DwIFaQ&c=ilBQI1lupc9Y65XwNblLtw&r=lTRDjB8ojaf7ZaJ9DHeDAm7e-
>>> HFP9fxIkv
>>> 6fRnV49HE&m=DpuKw60ajx9DXVwXVVotAbqTtfMgqbAGnV7C3-
>>> u9Q9c&s=kWsQdITvkDR
>>> fi539OTxC_UCHQpGwmRZfqsvWJu29qbY&e=
>>>>>
>>>>>
>>>>>
>>>>
>>> https://urldefense.proofpoint.com/v2/url?
>>> u=http-3A__www.mplinc.com&d=
>>> DwIFaQ&c=ilBQI1lupc9Y65XwNblLtw&r=lTRDjB8ojaf7ZaJ9DHeDAm7e-
>>> HFP9fxIkv6
>>> fRnV49HE&m=DpuKw60ajx9DXVwXVVotAbqTtfMgqbAGnV7C3-
>>> u9Q9c&s=xZhzOVJIK-z_
>>> WJU-f8-owFf6Ii5FzxT-j0YYc9RBbtM&e=
>>>>>
>>>>>
>>>>>
>>>>> MPL, Inc.
>>>>>
>>>>> 41 Dutch Mill Road | Ithaca | NY | 14850
>>>>>
>>>>> An ISO 9001:2015 Certified and ITAR Registered Company
>>>>>
>>>>> IPC member since 2004
>>>>>
>>>>
>>>
>>
|
