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MID AMERICA Taping and Reeling, Inc.
www.us-
tech.com
630.629.6646
www.matr.com
October , 2019
The Seven Habits of Highly Effective Solderers
Continued from page 22
(or lack thereof). Turning up the heat doesn’t make you more efficient, it just makes you a faster defect gener- ator. There is an optimum tempera- ture for your applications. Do the en- gineering process work to figure it out and stick to it. Just as more heat doesn’t
Tape and Reel Service & Supplies Surface Mount Axial / Radial Custom Carrier
result in more efficiency, the same is true for more pressure. Do you think you can push more heat into that tough multilayer PCB with heavy copper ground planes? That’s like saying if the push the plug into the wall out- let harder, then my belt sander will turn faster. Maybe you need preheat or auxiliary heat to ac- complish the task correctly. If you don’t have the expertise to do the process development work, look to a good vendor who can help or take a training class to learn.
Trays Vacuum Sealers Programming
121 Exchange Blvd Glendale Heights, IL 60139 See at The ASSEMBLY Show, Booth 2215
Throw away the sponge. Replace the old sponge with a brass wool type of tip cleaner. The wet sponge ther- mally shocks solder tips and creates micro cracks in the tip plating. These cracks allow oxidation and corrosion into the tip core, leading to prema- ture tip failure. This is especially true with the elevated process tem- peratures for lead-free soldering.
Remove old solder. Don’t reuse the old solder. You are not saving any money and only lose a few seconds to remove it with a good desolder tool. When solder has been reflowed too many times, it forms a crystalline structure and can lose its strength.
Start fresh with new solder for long- term reliability.
Inspect the
job.Most of us can’t see today’s SMT packages with the naked eye, so use a suitable inspec- tion tool and take a minute to review
Take the time to use the best tip for the job.
your work. This will ensure that it is as good as you think. It is amazing how much more you can see at 3, 4 or 10x magnification. Learn the IPC- 610 specification and what the ac- cept, reject and target criteria are for your components and assemblies. Finally, always strive for IPC
Class 3. If you must meet IPC Class 2, don’t just settle. Achieving Class 3 is not that difficult if you know how to get that level of quality. A little knowledge and process work can do wonders for your masterpiece, and your company’s reputation. Contact: Circuit Technology,
Inc., 340 Raleigh Street, Holly Springs, NC 27540 % 919-552-3434 E-mail:
sales@circuittechnology.com Web:
www.circuittechnology.com r
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