[PCB_FORUM] Re: RoHS and PCB Re-Work

Hi

Reworking RoHS isn't funny.  The iron tip will likely have to be a lot hotter, 
~450 deg C, as opposed to ~ 350 deg C.  (Don't quote me too much on those 
figures, though - but it is significantly hotter.)

I believe Tom means a LF soldering iron tip, which is correct, but you may 
easily get away with a normal tip.  I think the LF tips are needed for 
extensive rework, otherwise they will quickly degrade.  Your 0805 replacement 
is probably already RoHS, as the vast majority have been for several years.

(Yes, there are a lot of 'maybes' and 'possibly's.  There aren't any experts in 
this field yet.)

Cheers,
Richard


  
__________________________
Richard Moffat
PCB CAD Manager
Allied Telesis Labs
ph. +64 (3) 3393000
richard.moffat@xxxxxxxxxxxxxxxxxxx
>>> trobinson@xxxxxxxxxx 04/29/06 6:06 AM >>>
Hi Jeff:

I will use a new soldering iron tip, a roll of lead-free solder, compliant
no-clean flux and compliant spray flux remover and compliant solder braid.

If I have to change a smt 0805 resistor and the assy. is RoHS than I will
have to buy a RoHS Lead-Free replacement resistor.

The name of the game here is "due diligence".

tr :)


-----Original Message-----
From: Jeff McKnight [mailto:jeff@xxxxxxxxxxxxxxx]
Sent: Friday, April 28, 2006 11:24 AM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] RoHS and PCB Re-Work


Hello All,
The question here has come up about what to do with repair or re-work of
RoHS compliant PCBs.  After doing some research, it appears that the 
consequences
of using one solder composition in manufacturing and another in repair 
and re-work are
unknown.  It is believed that mixing lead free alloys can lead to 
unreliable solder joints. 
Do any of you have any comments ?  How are you handling this situation ?
Thanks,
Jeff

-- 
Jeff McKnight
Engineering Manager

Athens Technical Specialists, Inc.
8157 U.S. Route 50
Athens, Ohio
45701-9303

740.592.2874
FAX.594.2875

www.atsi-tester.com

visit ATSI's online shop:
www.atsi-tester.com/shop/ 

-----------------------------------------------------------
To subscribe/unsubscribe: 
Send a message to icu-pcb-forum-request@xxxxxxxxxxxxx
with a subject of subscribe or unsubscribe

To view the archives of this list go to
http://www.freelists.org/archives/icu-pcb-forum/

Problems or Questions:
Send an email to icu-pcb-forum-admins@xxxxxxxxxxxxx
-----------------------------------------------------------

This  message and any file transmitted with it may contain confidential
information and is exempt from disclosure under applicable law.  The
information contained in this message and any file transmitted with it
is transmitted in this form based on a reasonable expectation of
privacy.  Any disclosure, distribution, copying or use of the
information by anyone other than the intended recipient, regardless of
address or routing, is strictly prohibited. If you have received this
message in error, please advise the sender by immediate reply and delete
the original message. Personal messages express views solely of the
sender and are not attributable to Biodex Medical Systems, Inc.
-----------------------------------------------------------
To subscribe/unsubscribe: 
Send a message to icu-pcb-forum-request@xxxxxxxxxxxxx
with a subject of subscribe or unsubscribe

To view the archives of this list go to 
http://www.freelists.org/archives/icu-pcb-forum/

Problems or Questions:
Send an email to icu-pcb-forum-admins@xxxxxxxxxxxxx
-----------------------------------------------------------

NOTICE: This message contains privileged and confidential
information intended only for the use of the addressee
named above. If you are not the intended recipient of
this message you are hereby notified that you must not
disseminate, copy or take any action in reliance on it.
If you have received this message in error please
notify Allied Telesis Labs Ltd immediately.
Any views expressed in this message are those of the
individual sender, except where the sender has the
authority to issue and specifically states them to
be the views of Allied Telesis Labs.
-----------------------------------------------------------
To subscribe/unsubscribe: 
Send a message to icu-pcb-forum-request@xxxxxxxxxxxxx
with a subject of subscribe or unsubscribe

To view the archives of this list go to 
http://www.freelists.org/archives/icu-pcb-forum/

Problems or Questions:
Send an email to icu-pcb-forum-admins@xxxxxxxxxxxxx
-----------------------------------------------------------

Other related posts: