We search for industry news, so you don't need to.
|
|
|
| February 9, 2012
|
| |
Circulation Over 51,000
|
|
January 10, 2011
Component Storage Recommendations
What do you recommend as an environment for component storage to prohibit oxidation? Relative humidity, nitrogen atmosphere, temperature etc.
Is there a standard storage environment scenario considered as good practice?
G. H.
|
To prevent oxidation nitrogen environment at nominal room temp is your best choice.
|
John Norton
Eastern Manager
Vitronics Soltec
John Norton started his soldering career in 1983 for Hollis Engineering. He has also worked with Electrovert as a technical training manager and Vitronics Soltec for the last ten years. He has held various technical development and sales positions.
|
|
Nitrogen at room temperature. It would be best if the storage box is not sealed to have a slight flow of N2.
|
Steven Adamson
Market Specialist
Nordson ASYMTEK
Market Specialist for Nordson ASYMTEK. Mr. Adamson worked for Kodak, Motorola and Plessey, ICL in the UK with 5 US and 2 UK patents. He was awarded a HNC in electrical engineering and was 2008 President of IMAPS. Mr. Adamson was a respected mentor in the electronics industry. He passed away October, 2011. Learn about the Steve Adamson Memorial Annual Scholarship Fund.
|
|
According to IPC/JEDEC-J-STD 033B.1 Table 7-1, all level moisture-sensitive components may be exposed indefinitely in an environment that allows for 5%RH or under and maximum temperature of 35 degrees C.
Under these storage conditions, oxidation should not be an issue for the short term or longer term of a few years.
|
Michelle Ogihara
Sales and Marketing Manager
Seika Machinery Inc.
Michelle is the Sales and Marketing Manager of Seika Machinery, Inc. She is an active member of the SMTA taking on a past position as Chapter President and currently Secretary, Co-Chairs the MSD Council and serves on several committee positions.
|
|
There are several mechanisms which will degrade solderability dependant on the type of finish.
Oxidation or corrosion which are influenced by the atmosphere the parts are stored in terms of oxygen and humidity levels and intermetallic growth between substrates and plated layers which are accelerated by temperature.
The storage used will very much depend on the length of time to be stored and how regular your access to the stock is required. For long term storage you could seal them within moisture barrier bags and store at low temperature to maximise useful life.
For short term a clean area with temperature / humidity control should suffice. 15 to 21 C at 20 to 60% RH.
|
Bryan Kerr
Principal Engineer - CMA Lab
BAE Systems
Bryan Kerr has 35 years experience in providing technical support to PEC assembly manufacturing. His experience ranges from analysis of materials and components to troubleshooting and optimizing, selecting reflow, cleaning, coating and other associated processes.
|
|
A superior method of storing moisture-sensitive-devices (MSDs) are our desiccant cabinets that combine heat with dehumidification. They can be used not only to store these parts at greather than or equal to 5% RH, but by low-temperature baking, will also reset the floor life of components and assemblies that have been exposed to ambient humidity.
Parts can be stored and baked at 40 degrees C for an unlimited amount of time so the cabinets offer an excellent method for long-term storage. This compares favorably with the process of baking at 125 degrees C, which will cause oxidation, reducing solderability.
That's why the 033 standard limits total accumulated baking time permitted at 125 degrees C
|
Mike Schwartz
Director of Marketing
Manncorp
Mike Schwartz is Founder & CEO of B2B ad agency, MSA Advertising in Philadephia. He retired after 47 years, but was soon hired by a former client, Henry Mann, to run the marketing depatment at Manncorp. Manncorp sells SMT equipment online with sales originating from our e-commerce web site.
|
No additional comments have been submitted.
|
| Submit a comment - Add to the discussion. |
|
|
|
|
|
