That's the "joy" of working for a CM! Even worse is when a customer is
adament that your company MUST adopt THEIR soldering spec as your standard
for your company, after all it's on their drawing! For some, IPC apparently
just isn't good enough - their company has the only "experts" in the
industry in their employ...
-----Original Message-----
From: Hogg, Blair K. [mailto:[log in to unmask]]
Sent: Monday, August 27, 2007 10:25 AM
To: [log in to unmask]
Subject: Re: [TN] Fw: question regarding IPC standard
If you are the subcontractor, you have to either abide by the requirements
imposed by your customer, or negotiate the requirements before accepting the
contract.
If a CM has many customers, and each can impose different requirements in
addition to / as a replacement to IPC specs, how does the CM keep track of
all the differences?
Blair
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bev Christian
Sent: Thursday, August 23, 2007 4:22 PM
To: [log in to unmask]
Subject: Re: [TN] Fw: question regarding IPC standard
In the contract or PO put that your company specs take precedence over the
IPC ones.
Bev
RIM
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Roberts, Jon
Sent: Thursday, August 23, 2007 4:19 PM
To: [log in to unmask]
Subject: Re: [TN] Fw: question regarding IPC standard
Comment, if in our case we have a large contract that states in the Quality
Assurance section that states Soldering shall be in accordance with
ANSI/J-Std 001 Class 3. Repair, rework and modification shall be in
accordance with IPC-7711 and 7721 Class 3. Acceptability of solder joint
shall be per IPC-A-610 Class 3 and ANSI/J-Std-001 Class 3. In the event of a
conflict between IPC-A-610 and ANSI/J-Std 001, the ANSI/J-Std-001 shall
prevail.
So how can we vary or not abide? Jon
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Roger Stoops
Sent: Thursday, August 23, 2007 8:42 AM
To: [log in to unmask]
Subject: Re: [TN] Fw: question regarding IPC standard
IPC 610 is a standard, but some companies may have variences from that
standard, that is their choice. Nothing in the 610 states that a mfgr
must abideth by said standard or shall suffereth the dire penalties if
they leave the straight and narrow path. There may be some mfg'g
concerns that are not directly addressed by 610 that need to be clearly
stated in an assembly document or standard, such as the addition of
certain special hardware or adhesives (7.3.2 good section, but isn't
clear enough for our end products).
But an order of precedence should be clearly stated and signed off by
all concerned parties. Somebody has to make the call.
My personal preference, FWIW, is:
1) <company name> Manufacturing Standards
2) CM Manufacturing Standards
3) IPC standards
4) Component manufacturer guideline(s)
5) Other applicable industry standards
May also want to refer to A-610, section 1.4.2, "Acceptance Criteria."
Please note A-610 is number 3 in a list of 4 items.
BRgds,
Roger
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bob Arciolla
Sent: Thursday, August 23, 2007 10:08 AM
To: [log in to unmask]
Subject: [TN] Fw: question regarding IPC standard
Hi all,
A question came up here yesterday regarding what has precedence in
regard to quality issues. Some say IPC 610 would over company criteria
and some visa versa. The question came up noting that it is a standard
and cannot be changed. Others said it is that companies can vary from
the standard if they choose. Help.. who is right here??
Thanks, Bob
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