|
Sponsor
|
|
Your Partner for All Inspection Tasks
AOI from Viscom for the Best Cycle times and Maximum Inspection Depth. See 3D AXI, 3D AOI and 3D MXI at IPC APEX EXPO. Visit booth 2820. March 18-20.
Viscom
|
|
| Ask the Experts |
|
QUESTIONS
SUBMIT
MEMBERS
JOIN
|
July 13, 2008 - Updated
July 13, 2008 - Originally Posted
Soldering Grid Array Packages
Does anyone have good process experience in soldering 90pb10sn column grid array packages, where the wetting is 360 degrees around the column to land interface? In using IBM columns, we see asymmetrical fillets and columns shifting to the edge of lands. Any suggestions are welcomed.
E.C.
|
| Expert Panel Responses |
Past experience with one of our customers with a similar situation was resolved with an inert atmosphere (nitrogen) in the reflow process. I would suggest that you use around 1000 ppm oxygen level or less in the reflow zone to achieve the fillets and reduce or eliminate the shifting.
Gregory Arslanian
Global Segment Manager, Air Products & Chemicals, Inc.
Mr. Arslanian has been involved in electronics packaging processing and equipment since 1981 including flipchip, TAB, wirebonding and die attach. Current responsiblities include R&D, applications, marketing and customer interaction.
|
|
Submit A Comment
|
Comments are reviewed prior to posting. You must include your full name to have your comments posted. We will not post your email address.
|
Free Newsletter Subscription
Circuitnet is built for professionals who bear the responsibility of looking ahead, imagining the future, and preparing for it.
Insert Your Email Address
|
|
