AN EXAMINATION OF 'DRY BOX' DESICCANT STORAGE WITHIN THE PCB MANUFACTURING ENVIRONMENTAuthor: Kevin McCarten
Company: Lizem Technologies, Inc.
Date Published: 9/21/2003 Conference: SMTA International
Dry boxes can be implemented at various points within the Mfg. environment; for med-long term inventory, or for short term handling on the production floor, and in some cases (with certain conditions) as a process replacement for baking. Bare boards, raw components and partially assembled PCB’s can benefit from ultra-low humidity storage.
Depending on the application (ie; short term, long term, ‘bake-out’), the items stored within, and their condition as they enter dry storage, various loads will be placed on the storage cabinets; however in all cases user expectations will remain the same; short recovery time after door open, and a constantly maintained ultra-low humidity (1 % - 5% RH) environment. Without the proper assessment of the load that will be placed on a particular dry box application, and an examination of the dry box variations available (ie N2 ‘trickle’, N2 Purge, Multi-desiccators, addition of heating, or a combination of any thereof, etc) it’s almost certain that manufacturers will not be satisfied with their observed results, and will not be storing their devices safely.
Members download articles for free:
Not a member yet?
What else do you get when you join SMTA? Read about all of the benefits that go along with membership.
Notice: Sharing of articles is restricted to just your immediate work group. Downloaded papers should not be stored on an external network or shared on the internet.