[tinwhiskers] Re: - RoHS & BGAs!!!
- From: "Bob Landman" <rlandman@xxxxxxxxxxxxxxxxx>
- To: <tinwhiskers@xxxxxxxxxxxxx>
- Date: Wed, 18 Feb 2009 01:18:36 -0500
Hani,
Your equipment should be exempt from RoHS requirements. Do not use SAC solders
or SAC BGAs if you expect a 20+ year life. The mechanical vibration from
switching your reclosers will shake the BGAs off their pads. Mechanical shock
is the nemisis of SAC alloys, especially at low temperatures. Outside on a
pole in Alaska is going to cause failures.
See
http://ap.pennnet.com/display_article/312379/36/ARTCL/none/none/1/Detecting-Brittle-Fracture-Failures/
Bob Landman
H&L Instruments, LLC
www.hlinstruments.com
-----Original Message-----
From: tinwhiskers-bounce@xxxxxxxxxxxxx
[mailto:tinwhiskers-bounce@xxxxxxxxxxxxx] On Behalf Of AL-Yousef, Hani E
Sent: Friday, February 13, 2009 11:27 AM
To: tinwhiskers@xxxxxxxxxxxxx; TechNet E-Mail Forum;
RoHSUSAPushback@xxxxxxxxxxxxxxx; SMART Group smart-e-link
Subject: [tinwhiskers] - RoHS & BGAs!!!
Hello All,
I am in the hunt for information on how to best evaluate whether
underfill is needed for SAC BGA when soldered with SAC paste.
Also, part of my evolution is to find the right solder, flux and chemistry to
clean afterwards. Further specify a cleanliness level.
I guess one has to find to the right test to use to evaluate these
parameters.
Our products are expected to last for 20+ years while mounted outside on
a power distribution pole mounts.
I can use all the help I can get.
Thanks
Hani
Other related posts:
- » [tinwhiskers] - RoHS & BGAs!!!- AL-Yousef, Hani E
- » [tinwhiskers] Re: - RoHS & BGAs!!!- Werner engelmaier
- » [tinwhiskers] Re: - RoHS & BGAs!!!- Frank Simpson
- » [tinwhiskers] Re: - RoHS & BGAs!!!- Werner engelmaier
- » [tinwhiskers] Re: - RoHS & BGAs!!!- AL-Yousef, Hani E
- » [tinwhiskers] Re: - RoHS & BGAs!!!- Frank Simpson
- » [tinwhiskers] Re: - RoHS & BGAs!!!- Werner engelmaier
- » [tinwhiskers] Re: - RoHS & BGAs!!! - Bob Landman
- » [tinwhiskers] Re: - RoHS & BGAs!!!- AL-Yousef, Hani E
- » [tinwhiskers] Re: - RoHS & BGAs!!!- Bob Landman
- » [tinwhiskers] Re: - RoHS & BGAs!!!- Parnagian, Edward
- » [tinwhiskers] Re: - RoHS & BGAs!!!- AL-Yousef, Hani E
- » [tinwhiskers] Re: - RoHS & BGAs!!!- Werner engelmaier
- » [tinwhiskers] Re: - RoHS & BGAs!!!- Parnagian, Edward
- » [tinwhiskers] Re: - RoHS & BGAs!!!- Parnagian, Edward
- » [tinwhiskers] Re: - RoHS & BGAs!!!- Parnagian, Edward
- » [tinwhiskers] Re: - RoHS & BGAs!!!- Werner engelmaier
- » [tinwhiskers] Re: - RoHS & BGAs!!!- Bob Landman
- » [tinwhiskers] Re: - RoHS & BGAs!!!- Meschter, Stephan J \(US SSA\)
- » [tinwhiskers] Re: - RoHS & BGAs!!!- Parnagian, Edward
- » [tinwhiskers] Re: - RoHS & BGAs!!!- Meschter, Stephan J \(US SSA\)
- » [tinwhiskers] Re: - RoHS & BGAs!!!- Mark Vaughan
- » [tinwhiskers] Re: - RoHS & BGAs!!!- Patrick Bruneel
- » [tinwhiskers] Re: - RoHS & BGAs!!!- Mark Vaughan
- » [tinwhiskers] Re: - RoHS & BGAs!!!- John Barnes
- » [tinwhiskers] Re: - RoHS & BGAs!!!- Bob Landman
- » [tinwhiskers] Re: - RoHS & BGAs!!!- Bob Landman
- » [tinwhiskers] Re: - RoHS & BGAs!!!- Parnagian, Edward
- » [tinwhiskers] Re: - RoHS & BGAs!!!- AL-Yousef, Hani E
- » [tinwhiskers] Re: - RoHS & BGAs!!!- AL-Yousef, Hani E
- » [tinwhiskers] Re: - RoHS & BGAs!!!- Glen Herzog
- » [tinwhiskers] Re: - RoHS & BGAs!!!- Alvin Kevichusa
- » [tinwhiskers] Re: - RoHS & BGAs!!!- Meschter, Stephan J \(US SSA\)
- » [tinwhiskers] Re: - RoHS & BGAs!!!- AL-Yousef, Hani E