|
Sponsor
|
|
High-Reliability for Low-Temp Processes
Durafuse® LT low-temp, high-rel solder paste is bismuth-free, reduces warpage in large BGAs, enhances thermal cycling, drop shock reliability and reduces energy use up to 15%.
Indium Corporation
|
|
|
Sponsor
|
|
Unlock the Potential of Salvaged Devices
Component harvesting is a reliable method of electronic component reclamation, reducing e-waste and ensuring economic reuse for automated assembly.
BEST Inc.
|
|
| Ask the Experts |
|
QUESTIONS
MEMBERS
|
April 23, 2007 - Updated
July 4, 2007 - Originally Posted
Soldering reliability using SAC 305 . . .
What is the impact on reliability soldering parts using SAC 305 solder paste on 63/37 HASL pads?
M.B.
|
| Expert Panel Responses |
Mixed metal manufacturing is, in fact, quite commonplace in today's manufacturing environments. Most often, due to component and board availability issues, we see lead-free finished devices being used in an otherwise Pb-free process. But, the reverse � as you've asked here � is also a fairly frequent occurrence. In either case, the most common problem with leaded devices and mixed metal manufacturing is improper wetting and through analysis and reflow profile adjustment, sometimes acceptable wetting can be achieved. But more severe problems exist when processing BGAs and CSPs in this environment. In this case, incomplete bump melting or collapsing occurs. The goal is to promote even distribution of lead throughout the solder joint, but, if the bump doesn't melt completely, achieving this condition is impossible. Without the lead evenly dispersed within each solder joint, premature joint cracking and early thermal fatigue are the most likely outcomes, yielding uncertain device reliability. Mixed metals may also put you out of tolerance with RoHS. Shipping product to Europe with mixed metal assembly methods may be setting your company up for penalties or fees due to lead content in the solder joints. For more information, please click on this white paper.
Doug Dixon
Marketing, 360-Biz
Douglass Dixon is the Chief Marketing Officer for 360 BC Group, a marketing agency with offices throughout the US. 360 BC specializes in consulting and implementing successful marketing programs that utilize the latest in marketing, sales and technology strategies. As an electronics veteran, Dixon has worked in the industry for over 30 years for companies like Henkel, Universal Instruments, Camelot Systems, and Raytheon. Dixon's electronics industry experience includes a broad skill set that includes engineering, field service, applications, product management and marketing communications expertise.
|
|
|
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
|
|
Sponsor
|
|
EZ-FLO High Precision Dispense Tips
Each needle is machined from solid stainless steel as opposed to rolled tubing. The resulting smoother internal profile enhances material flow and consistency. Learn more.
DL Technology
|
|
|
