My friend Shuley Nakamura at Linear Technology responded with this advice.  I placed the doc she sent me on my website
http://www.hlinstruments.com/IPC_docs/Linear_Technology_uModule_LGA_Assembly.pdf

LT folks provide excellent support. Their lab in Mass is very well equipped to solve problems. 

My friend Jim Williams (sadly died suddenly sevral years ago followed by another good friend Bob Pease at Jiim's funeral!) was one of the finest applications and design engineer I've ever had the pleasure to meet (we both collect old tube Tektronix scopes). His app notes. esp when the baby was being fed (he worked at home in a lab over his garage) were a hoot.  You'll note the bottles of baby milk in a row - that's how many feedings of the baby transpired while Jim hammered out his app note. His book "Analog Circuit Design" is a keeper (I have an autographed copy delivered by Bob Pease one evening at work with his great book "Troubleshooting Analog Circuits" in which he wrote an autograph saying "Bob, may all your problems be middle sized so you can find 'em!".  

I've never had a bad part from Linear Technology. Documentation is thorough and you don't go through a phone bank and voice mail to get a reply.  Its refreshing.

Bob Landman

 
  _____  

From: Shuley Nakamura [mailto:[log in to unmask]]
To: 'Bob Landman' [mailto:[log in to unmask]]
Sent: Thu, 19 Sep 2013 11:24:43 -0500
Subject: RE: [TN] Antwort: Re: [TN] Linear LTM4613 uModule LGA, to bump, or not to bump?




Hi Bob,

 

We provide direct factory support for contract manufacturers who are using the LGA.. and this document that is attached is available on our website. Most CMs, once we walk them through the process, don’t have issues.. but a lot of them  don’t take the time to read what we strongly recommend for doing the stenciling, solder paste, baking, etc.. and then they have problems. We’ve found if people do follow the steps, they are successful.


Thanks for bringing this to my attention!

 


Shuley Nakamura

Field Sales Engineer

office: 978-656-3763

cell: 617-359-9868

[log in to unmask]


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