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May 14, 2018

Hot Air Solder 0201s and 01005s

We are struggling to solder and rework small parts - 0201s and 01005s. I have been using a small nozzle hot air solder rework station with adjustable air flow. The minimum air flow on the unit will blow small parts across the work bench inthe blink of an eye. My world of reworking small passives etc. with leadfree solder is painful. I am open to any suggestions you may have.

T.G.

Expert Panel Responses

There are several companies thatoffer mini and micro soldering/de-soldering tweezers just for this type ofwork. I recommend checking with your soldering tip supplier to see ifthey can fit your current equipment.

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Edithel Marietti
Senior Manufacturing Engineer
Northrop Grumman
Edithel is a chemical engineer with 20 year experience in manufacturing & process development for electronic contract manufacturers in US as well as some major OEM's. Involved in SMT, Reflow, Wave and other assembly operations entailing conformal coating and robotics.

Iwould suggest you rework with an IR rework station and dispense paste with asyringe. Check out the DAGE 3000. That what I have used for 0201s withsome minor modifications you can place and reflow all with one system.

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Terry Munson
President/Senior Technical Consultant
Foresite
Mr. Munson, President and Founder of Foresite, has extensive electronics industry experience applying Ion Chromatography analytical techniques to a wide spectrum of manufacturing applications.

Forthese type of devices we have switched back to using infrared reworkstation.Itis slow but works amazingly. Also see if your team can use a solderiron tweezer. I have not been able to successfully solder 01005s withthis, due to the design of our lands. (Changed to almost bottom solderdevice to eliminate tomb-stoning)

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Kishan Sarjoo
Process Engineering Manager - Electronics
Altech UEC, South Africa
Currently with Altech UEC and responsible for technology road map in PCBA electronic manufacturing and technical support for PCBA electronic manufacturing for Altech UEC and its JDM's. Over 7 years in SMT, Radial Insertion, Wave solder & Test Applications.

Thankyou for the question. Iunderstand your frustration in using hot air to reflow those small components0201 and 01005, as the processes are not quite in place to reflow components sosmall. Additionally the amount of paste to be applied to those pads isvery difficult to maintain a minimum amount. The existing equipment hasto be special to do this correctly and unless you can help from an equipmentsupplier it will be difficult. Weare developing a process to do this and I would recommend visiting our website, www.eptac.com for more information.

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Leo Lambert
Vice President, Technical Director
EPTAC Corporation
At EPTAC Corporation, Mr. Lambert oversees content of course offerings, IPC Certification programs and provides customers with expert consultation in electronics manufacturing, including RoHS/WEEE and lead free issues. Leo is also the IPC General Chairman for the Assembly/Joining Process Committee.

In order to rework small/special components, you need specialtools. From your question, I do not understand if you are reworkingboards and these parts are close to the rework area or your intention is torework these particular parts.If you want to rework parts like 0201 and 01005 I highly recommendthe JBS nano station tweezers. They are great, I have used them in the past andthey are the perfect solution for something like this.For stencil design, paste deposition, pick and place and reflowthere are more things to consider. Should these components be in an area that gets reworked, you canminimize the damage by protecting the surrounding areas of the component beingreworked from the hot air flow using masking or kapton tape.

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Georgian Simion
Engineering and Operations Management
Independent Consultant
Georgian Simion is an independent consultant with 20+ years in electronics manufacturing engineering and operations.
Contact me at georgiansimion@yahoo.com.