Dewey you are what you is.
 > Date: Tue, 15 Jan 2013 22:03:17 +0000
> From: [log in to unmask]
> Subject: Re: [TN] Mounting Hardware to QFP Component Lead
> To: [log in to unmask]
> 
> Dewey is it your or you are (you're)
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> pat
> 
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Whittaker, Dewey (EHCOE)
> Sent: Tuesday, January 15, 2013 1:34 PM
> To: [log in to unmask]
> Subject: Re: [TN] Mounting Hardware to QFP Component Lead
> 
> That was very Admirable of you catching my intended humor.
> Dewey
> 
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Wayne Thayer
> Sent: Tuesday, January 15, 2013 9:49 AM
> To: [log in to unmask]
> Subject: Re: [TN] Mounting Hardware to QFP Component Lead
> 
> At least you've corrected Dewey's Decimal!
> 
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Whittaker, Dewey (EHCOE)
> Sent: Tuesday, January 15, 2013 11:41 AM
> To: [log in to unmask]
> Subject: [TN] FW: [TN] Mounting Hardware to QFP Component Lead
> 
> My apologies. In switching to HTML format to use symbols, I missed my point (decimal , that is). I meant 0.25". It is much better  to be diametrically opposed, than having you’re point missed altogether.
> 
> Dewey
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> 
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Whittaker, Dewey (EHCOE)
> Sent: Tuesday, January 15, 2013 9:25 AM
> To: [log in to unmask]
> Subject: Re: [TN] Mounting Hardware to QFP Component Lead
> 
> 
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> There are many divine principles, disciplines, mandates and theoretical dogmas that have not made their way into IPC-2221, why would you expect  this question, with all the good previously alluded to variables and potential mitigating scenarios, to be covered with a standard keep-out area?
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> Since you asked again I'll accept your naiveté on this subject matter and state; 0.025 " keep-out clearance from edge of hole to nearest pad geometry.
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> Dewey
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> -----Original Message-----
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> From: TechNet [mailto:[log in to unmask]] On Behalf Of Jack Olson
> 
> Sent: Tuesday, January 15, 2013 8:37 AM
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> To: [log in to unmask]<mailto:[log in to unmask]>
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> Subject: Re: [TN] Mounting Hardware to QFP Component Lead
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> True, but I can't help but wonder if I'm missing something...
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> Of all the issues that the IPC committees have discussed over the last few DECADES, why can't I find anything about mounting structures to component clearance?
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> hmmm...  dar's gotta be sumpn 'bout dat!
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> thanks anyway,
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> Jack
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> .
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> On Mon, 14 Jan 2013 19:16:27 +0000, Wayne Thayer <[log in to unmask]<mailto:[log in to unmask]<mailto:[log in to unmask]:[log in to unmask]>>> wrote:
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> >If it is a new QFP with the pure copper/very high copper leads then I wouldn't worry about it.  Those leads are so compliant they can absorb amazing amounts of stress.
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> >Wayne Thayer
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> >-----Original Message-----
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> >From: TechNet [mailto:[log in to unmask]] On Behalf Of Jack Olson
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> >Sent: Monday, January 14, 2013 11:36 AM
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> >To: 
> >[log in to unmask]<mailto:[log in to unmask]<mailto:[log in to unmask]:
> >[log in to unmask]>>
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> >Subject: [TN] Mounting Hardware to QFP Component Lead
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> >To the assembly professionals out there:
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> >Have you ever had reliability issues with mounting screws if they are near a Quad Flat-Pack? My 144 pin land pattern is pretty close (100mils) but we are mounting the board into a very flat structure (no bowing) I can't imagine the compression of the board material could affect gull-wing style lead connections (maybe BGA?) but I don't know...
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> >thanks,
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> >Jack
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