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Subject:
From:
Werner Engelmaier <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Werner Engelmaier <[log in to unmask]>
Date:
Wed, 14 Apr 2010 14:19:06 -0400
Content-Type:
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text/plain (190 lines)
 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 supplement to IPC-1710, as well as recommendations forongoing activities to assure that qualified PCB shops maintain the quality ofthe PCBs produced 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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