Hi Greg,
I'm sorry I don't have a copy of IPC-6012B. Just IPC-6012A.
But in general I would expect that if you wish to deviate from the standard
you must specify it on the drawing, including the specific exclusions or
optional exceptions.
Also you must specify the requirements in such a way as to not have them be
ambiguous or misinterpreted. I have not seen the list of exceptions but
maybe someone who has the latest copy of the spec can review them with us
and you can make a determination as to what level of documentation is
required. Then the manufacturer can easily read down the specification
'tree' in the document and determine exactly what you require for your board
to meet spec.
Best regards,
Bill Brooks - KG6VVP
PCB Design Engineer , C.I.D.+, C.I.I.
Tel: (760)597-1500 Ext 3772 Fax: (760)597-1510
e-mail:[log in to unmask]
http://www.dtwc.com
http://pcbwizards.com
-----Original Message-----
From: Brionez, Gregory [mailto:[log in to unmask]]
Sent: Tuesday, January 25, 2005 10:09 AM
To: (Designers Council Forum); Brooks,Bill
Subject: RE: [DC] IPC 6012
Some Clarification
IPC 6012B Has a Performance Specification Sheet for Space and Military
Avionics
A part of that sheet has some Exceptions to IPC-6012B Class 3 Performance
attributes classified as Class 3/A requirements.
What I want to know is if I specific Build per IPC-6012B Class 3/A do I have
to identify each exception on the rest of my fabrication notes?
Thanks
Paul Brionez - CID <mailto:[log in to unmask]>
[log in to unmask] <mailto:[log in to unmask]>
PCB Designer
PH: 847-673-2718 x1394
FAX: 847-673-9789
DIVISION: Electronic/Systems
MPC Products Corporation
<http://www.mpcproducts.com> ISO 9001 Certified
Skokie, IL USA <http://www.mpcproducts.com>
-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]]On Behalf Of
Brooks,Bill
Sent: Tuesday, January 25, 2005 11:59 AM
To: [log in to unmask]
Subject: Re: [DC] IPC 6012
Vague question Greg...
I will guess at what you are trying to point out then...
The IPC-6012A defines the qualification and performance criteria for rigid
printed circuits but maybe what you are getting at is the performance class
qualification under that specification, i.e. which class it is categorized
under... class 1 - General, class 2 - Dedicated Service or class 3 - High
Reliability. The spec breaks out requirements for the based upon which class
the board belongs in.
Did you get a job that did not specify the class? If you are doing Aerospace
design work your classification would be class 3 for instrumentation
involved in flying the plane or space vehicle... however the entertainment
equipment would probably not be required to meet that level of performance.
These are set by the 'end use' of the item and must be defined up front in
the design process according to IPC-2221.
Did that even come close to what your are fishing for?
Best regards,
Bill Brooks - KG6VVP
PCB Design Engineer , C.I.D.+, C.I.I.
Tel: (760)597-1500 Ext 3772 Fax: (760)597-1510
e-mail:[log in to unmask]
http://www.dtwc.com
http://pcbwizards.com
-----Original Message-----
From: Brionez, Gregory [mailto:[log in to unmask]]
Sent: Tuesday, January 25, 2005 8:17 AM
To: [log in to unmask]
Subject: [DC] IPC 6012
Question for all the Aerospace/Military designer or anyone who can answer
this.
When you specify "Build per IPC 6012 .... what do you use to at the end to
control the exceptions?
TIA
<http://www.mpcproducts.com/spacer.gif>
<http://www.mpcproducts.com/spacer.gif>
<http://www.mpcproducts.com/spacer.gif>
<http://www.mpcproducts.com/spacer.gif>
Paul Brionez - <mailto:[log in to unmask]> CID
[log in to unmask]
PCB Designer
PH: 847-673-2718 x1394
FAX: 847-673-9789
DIVISION: Electronic/Systems
<http://www.mpcproducts.com/> MPC Products Corporation
ISO 9001 Certified
Skokie, IL USA <http://www.mpcproducts.com/>
<http://www.mpcproducts.com/spacer.gif>
<http://www.mpcproducts.com/spacer.gif>
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