Hi Genny,
I must have misunderstood your question.
A given material from a given supplier can meet the requirements fro multiple, but related, slash sheets—hat is what i meant earlier when I said that 4101 is very broad.
Werner
-----Original Message-----
From: Genny Gibbard <[log in to unmask]>
To: TechNet E-Mail Forum <[log in to unmask]>; [log in to unmask]
Sent: Fri, Oct 2, 2009 2:41 pm
Subject: RE: [TN] IPC-4101B slash sheets
I have a datasheet open right now that says:
Industry Approvals
IPC-4101B /21, /24, /26, /98, /99, /101, /126
Genny
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Werner Engelmaier /*
Sent: October 2, 2009 12:13 PM
To: [log in to unmask]
Subject: Re: [TN] IPC-4101B slash sheets
Hi Genny,
How does your PCB fabricator know what to build for you, if you do not
specify? What assembly processes do they experience? What is the purpose
of your assemblies? What environments do they see?
"I have seen some material datasheets for the raw laminate that mention
meeting multiple slash sheets, which I don't understand"-neither do I,
and i have never seen this.
Werner
-----Original Message-----
From: Genny Gibbard <[log in to unmask]>
To: [log in to unmask]
Sent: Fri, Oct 2, 2009 1:47 pm
Subject: Re: [TN] IPC-4101B slash sheets
OK, but if you have never ever tied your laminate requirements to the
4101 (A, B, or C) in the first place, or forced your PCB fabricators
to
follow a specific slash, I am not sure what the importance of it is, or
how to use it. There seem to be an awful lot of different slash sheets.
I have seen some material datasheets for the raw laminate that mention
meeting multiple slash sheets, which I don't understand, either. How
can it meet so many different ones?
We have usually mentioned much more generic specs.
Maybe all my questions would be answered if I actually bought the IPC
doc and read it, but I need to justify to my company to spend money on
it, first.
Genny
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Werner Engelmaier /*
Sent: October 2, 2009 11:12 AM
To: [log in to unmask]
Subject: Re: [TN] IPC-4101B slash sheets
Hi Genny,
IPC-4101B is now obsolete with the
publication of IPC-4101C.? This
document provides the broad specifications for the various base
materials available for PCBs; the various slash sheets are the specific
specifications for a large variety of groups of base materials developed
for different purposes.
While 4101 goes a long way to describe the minimum requirements for each
slash sheet group, the document and the slash sheets are not
comprehensive enough for material specification per se.
Thus, on the drawings for PCBs of the customers, more specific
requirements need to be made than are available on the slash sheets.
This has become particularly important for PCBs subject to Pb-free
solder assembly and the much higher soldering temperatures required.
For this reason, I have dev
eloped a white Paper giving my clients
detailed recommendations for the specification of PCBs to survive
Pb-free assembly.
Regards,
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: Genny Gibbard <[log in to unmask]>
To: [log in to unmask]
Sent: Fri, Oct 2, 2009 1:00 pm
Subject: [TN] IPC-4101B slash sheets
I have never seen a copy of the IPC-4101B.
I keep hearing talk of the slash sheets. I am not sure I understand
what this spec is for or how to use it, and whether I should try to get
a copy in our facility.
Can someone give=2
0me a quick overview about this standard?
Genny
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