The world is now simply one huge "Beta" test for Pb free.
The question is how "gamble" do you have???
David A. Douthit
Manager
LoCan LLC
Dehoyos, Ramon wrote:
> Hi Gabriela:
> It is my belief that there will be a lot of issues. No entity has dedicated enough resources to create enough guidelines to make it a clean start. It will be a lot of live and learn on the part of all the industry, and there is something wrong with this approach, because many innocents will pay for the learning transition.
> Just my two cents.
> Ramon
>
>-----Original Message-----
>From: TechNet [mailto:[log in to unmask]]On Behalf Of Gabriela Bogdan
>Sent: Friday, January 21, 2005 11:12 AM
>To: [log in to unmask]
>Subject: Re: [TN] Lead-free Wave Solder Pot Impurity Levels
>
>
>Dear friends!
>With the overwhelming amount of information about disinformation concerning
>leadfree, I am ashamed to confess that I lost my way.
>I try to be GOOD, but I don't know anymore what it means concerning this
>subject.Once we had clear instructions, and I was GOOD following them. Today
>we have so much "IF"s, "BUT"s, and "MAYBE"s concerning reliability, who is
>responsible-for what-, and so on.
>Soon we will shift to leadfree. We will give the consumers what we are asked
>for. But is our conscience at peace?
>I just can not understand how and why rules are imposed before the solution
>to all the problems are found, and if not, openly stated as being there and
>brought to the knowledge of the customers and consumers.
>I would like to know at least how and according to what one will be
>qualified for leadfree products beside the requirements for the materials.
>Will the reliability tests remain the same for the future products as they
>were until now for lead containing products?
>Gaby
>----- Original Message -----
>From: "David D. Hillman" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Friday, January 21, 2005 3:40 PM
>Subject: Re: [TN] Lead-free Wave Solder Pot Impurity Levels
>
>
>
>
>>Hi Leland! Unfortunately the industry is going to need some time to
>>
>>
>develop
>
>
>>the wave solder pot impurity level table you are seeking. A fair portion
>>
>>
>of
>
>
>>the industry is using the current JSTD-001 impurity level table (user
>>modified for the increased tin, silver, and copper levels) and closely
>>monitoring their impurity levels. I would recommend that you work closely
>>with your solder supplier as they have visibility into the status/trends
>>
>>
>of
>
>
>>existing wave solder processes to whom they supply solder. Here is a
>>relevant reference on some wave solder impurity levels that may be of
>>interest:
>>
>>“Development and Validation of LeadFree Wave Soldering Process”, A.
>>
>>
>Forsten
>
>
>>etal, Soldering & Surface Mount Technology, Vol. 12, No. 3, 2000
>>
>>The short term solution is that the industry just needs time to understand
>>the potential changes to the JSTD-001 impurity limits that Pbfree solder
>>usage may induce. Good Luck.
>>
>>Dave Hillman
>>Rockwell Collins
>>[log in to unmask]
>>
>>
>>
>>
>>
>> Leland Woodall
>> <lwoodall@CSTECH-
>> INC.COM> To
>> Sent by: TechNet [log in to unmask]
>> <[log in to unmask]> cc
>>
>> Subject
>> 01/21/2005 05:26 [TN] Lead-free Wave Solder Pot
>> AM Impurity Levels
>>
>>
>> Please respond to
>> TechNet E-Mail
>> Forum
>> <[log in to unmask]>
>> ; Please respond
>> to
>> Leland Woodall
>> <lwoodall@CSTECH-
>> INC.COM>
>>
>>
>>
>>
>>
>>
>>Hi Folks,
>>
>>I have a small dilemma here. There is a standard for eutectic solder pot
>>impurity levels, but I can't seem to find one for lead-free. Is there
>>such an animal?
>>
>>Everything I've researched on the Web shows only recommendations, namely
>>from Alpha and AIM. Those two have slight disagreements.
>>
>>At least they provide something, and that is impressive.
>>
>>It also appears that the major concern is processing problems versus
>>product reliability. If copper content gets too high, the wave solder
>>viscosity becomes too high and bogs down the mechanical parts of the
>>machine.
>>
>>When things get out of whack, can I expect reliability problems as well?
>>
>>What levels of impurities would cause premature joint failure,
>>specifically?
>>
>>Are we too new to this, and have tests not yet been agreed upon? Is IPC
>>addressing the issue?
>>
>>Any help you could provide would be sincerely appreciated.
>>
>>Offline comments are welcomed.
>>
>>Many, many thanks,
>>
>>Leland Woodall
>>Quality Coordinator
>>
>>Keihin Carolina System Technology, Inc.
>>
>>---------------------------------------------------
>>Technet Mail List provided as a service by IPC using LISTSERV 1.8e
>>To unsubscribe, send a message to [log in to unmask] with following text in
>>the BODY (NOT the subject field): SIGNOFF Technet
>>To temporarily halt or (re-start) delivery of Technet send e-mail to
>>[log in to unmask]: SET Technet NOMAIL or (MAIL)
>>To receive ONE mailing per day of all the posts: send e-mail to
>>[log in to unmask]: SET Technet Digest
>>Search the archives of previous posts at: http://listserv.ipc.org/archives
>>Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16
>>for additional information, or contact Keach Sasamori at [log in to unmask] or
>>847-615-7100 ext.2815
>>-----------------------------------------------------
>>
>>
>
>---------------------------------------------------
>Technet Mail List provided as a service by IPC using LISTSERV 1.8e
>To unsubscribe, send a message to [log in to unmask] with following text in
>the BODY (NOT the subject field): SIGNOFF Technet
>To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
>To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
>Search the archives of previous posts at: http://listserv.ipc.org/archives
>Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
>-----------------------------------------------------
>
>
>
>
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
|
