Sent from my iPhone
On Apr 14, 2010, at 2:19 PM, Werner Engelmaier <[log in to unmask]>
wrote:
> Hi Bob,
> Here is a copy of the announcement of Version 9 of the White Paper;
> unfortunately, I only have it in English.
>
> EngelmaierAssociates, L.C. announces the release of the much
> expanded version v.09 of thewidely acclaimed White Paper titled:
> "Recommendations for PCB FAB Notes andSpecifications in Printed
> Circuit Board Drawings for SnPb and Lead-FreeSoldering Assemblies,
> the Qualification of PCB Shops and Activities to AssureContinued
> Quality."
> It has been argued, based on a lot ofevidence that the biggest
> threat to electronic hardware reliability posed bythe change to lead-
> free solders are problems with printed circuit boards. Asindicated
> by the title, in this report recommendations are made
> regardingappropriate specifications and ‘FAB Notes’ on drawings
> for printed circuitboards (PCBs), general procedures to qualify PCB
> shops and to assure they wouldbe producing PCBs of good quality, and
> testing procedures to verify quality andreliability.
> It provides the necessary additional material selection information
> tosupplement the inadequate information given in the slash sheets in
> IPC-4101. Itcontains recommended examples of ‘FAB Notes’—one
> for SnPb solder assemblies andone for RoHS-compliant Pb-free solder
> assemblies—serving as generalspecifications on PCB drawings, a basic
> questionnaire for new PCB shops to bequalified meant as a supplemen
> t to IPC-1710, as well as recommendations forongoing activities to a
> ssure that qualified PCB shops maintain the quality ofthe PCBs produ
> ced by them.
> Nowhere can so much concentrated andup-to-date information be found
> in one place. Version v.09 now includes 29specific FAB Notes, many
> with sub-notes, for the specification of PCBs to beutilized in lead-
> free solder assemblies.
> All the recommendations have been fullyresearched and referenced,
> and are discussed in detail in the White Paper,which in version v.09
> comprises 50 pages and 92 references.
> The cost of the report is $495.-; itwill be delivered as a pdf-file
> upon receipt of a check or purchase order.Updates will be sent
> automatically and at no additional cost.
> Werner Engelmaier
> Engelmaier Associates, L.C.
> Electronic Packaging,Interconnection and Reliability Consulting
> 7 Jasmine Run
> Ormond Beach, FL 32174 USA
> Phone: 386-437-8747, Cell: 386-316-5904
> E-mail: [log in to unmask], Website: www.engelmaier.com
>
>
>
>
>
>
>
>
>
> -----Original Message-----
> From: Bob Landman <[log in to unmask]>
> To: Werner Engelmaier <[log in to unmask]>
> Cc: [log in to unmask] <[log in to unmask]>
> Sent: Wed, Apr 14, 2010 9:15 am
> Subject: Re: [TN] Contract PCB Design Services T&C
>
>
> Werner,
>
> Would love to have a copy of the white paper. My designer is a
> contractor in Brasil. He's an expert at PCAD and it's subsequent
> incarnations , the latest being Altium. His fab notes aren't the
> greatest so I'd like to see how we can improve them since we have to
> make sure they use Sn/Pb procedures as we refuse to go lead-free.
>
> Bob
>
> Sent from my iPhone
>
> On Apr 13, 2010, at 12:51 PM, Werner Engelmaier <[log in to unmask]>
> wrote:
>
>> Peter, Greg & All,
>> It is precisely for these reasons that I developed the White Paper
>> > "Recommendationsfor PCB FAB Notes and Specifications in Printed >
>> Circuit Board Drawings for SnPband Lead-Free Soldering Assemblies,
>> > the Qualification of PCB Shops andActivities to Assure Continued
>> > Quality."
>> The OEMs no longer have any in-house expertise precisely at the
>> time > the need it the most because of the demands of Pb-free
>> assembly. > When sh.. hits the fan, as it invariably will, they
>> blame the Fab > house the assembly house or both, when it is
>> inadequately spec'ed > PCBs made according to an inadequate
>> specification, against which > the FAB houses bid, that is the root
>> cause of the problems.
>> Werner
>>
>>
>>
>> -----Original Message-----
>> From: Gregg Owens <[log in to unmask]>
>> To: [log in to unmask]
>> Sent: Tue, Apr 13, 2010 12:00 pm
>> Subject: Re: [TN] Contract PCB Design Services T&C
>>
>>
>> Pete:
>>
>> Your "rant" could easily be extended to every area of PCBA >
>> manufacturing. The
>> rise of PCBA assemblies houses in the 1980s are examples of how >
>> management has
>> tried to save upfront costs only to pay more in the end with longer
>> > lead times.
>> This is not to say assembly houses are "bad" but it transferred the
>> > electronics
>> manufacturing process away from the very people who would be >
>> installing and
>> using the PCBAs - the end users. This business model has created >
>> lots more
>> finger pointing between end users and the board and assembly houses
>> > because the
>> end users no longer retain the experience necessary to clearly >
>> determine whether
>> the root cause of a problem is design or process related. Then this
>> > century
>> throw in lead-free and you end up with lots of folks working very >
>> hard in this
>> industry but with all too great ignorance of the materials and >
>> processes they
>> are using, all the while trying to keep quarterly profits in a >
>> positive
>> position. I will now get off my soap box.
>>
>> Gregg Owens
>> Technical Writer - Avionics
>> Space Exploration Technologies Corporation
>> (310) 363-6533
>>
>>
>> -----Original Message-----
>> From: TechNet [mailto:[log in to unmask]] On Behalf Of Pete Houwen
>> Sent: Tuesday, April 13, 2010 7:19 AM
>> To: [log in to unmask]
>> Subject: Re: [TN] Contract PCB Design Services T&C
>>
>> Bob, I'm in a rather similar situation. A company of 3000+, R&D >
>> locations on 3
>> continents and 2 islands. I am the sole remaining PCB designer.
>>
>> To answer your questions first:
>>
>> 1. We have a set of company specific design standards, mostly to >
>> make sure
>> the data we receive is compatible with MRP and CAM standards, and
>> it > makes
>> it easier for me to pick up the "finished" job and, well, finish >
>> it. But we
>> don't
>> keep a standard agreement, as the services we require change based
>> > on the
>> design.
>>
>> 2. If a company can not deliver what we have asked for, either >
>> during or at
>> the end, they don't get paid. In a situation such as yours, a mutual
>> agreement to terminate the effort, we would pay them for the part
>> of > the
>> work we can use, whatever did meet parts of the agreement. This has
>> happened before.
>>
>> now the rant:
>>
>> We laid off all the designers but me. We send the work to China, >
>> using
>> engineers with no PCB experience whatsoever, to do design and
>> documentation. Their cost is 1/3 of ours. It takes them 3x as
>> long > to deliver
>> a design. Between the time I spend getting them started and >
>> correcting
>> after, I spend 1.5x what it would take to do the design myself. To
>> > Sr.
>> management, this is cost savings. Lately, we have been contacting
>> > one of
>> the designers we laid off. We pay him almost what it cost when he
>> was
>> employed here. And again, add in my time, so we're about even
>> now. > That
>> works well, except that he has another full time job, so turn time
>> > is longer.
>> And since I am stretched so thin, there have been errors - costly >
>> errors, and
>> reduced manufacturability.
>>
>> Here's hoping the new "Undercover Boss" TV series starts opening >
>> some eyes.
>>
>> Pete
>>
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>
>
>
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