Bonjour Yannick, Here are a few additional considerations relative to dry storage : Make sure that you understand exactly what kind of benefit you will get from your dry storage solution. In the contract manufacturing business, many of your customers will expect that you comply with the guidelines from the latest IPC/JEDEC standard J-STD-033A. This document contains precise rules on how to account for dry storage. In summary the clock of exposure time does not necessarily stop when previously exposed components are returned to dry storage, whether it be a dry cabinet, Nitrogen box or re-sealed dry bag with desiccant. The actual effect of dry storage on the remanining floor life will vary based on the type of component (MS level), the type of dry storage (RH level) and the complete history of exposure and subsequent storage. I also suggest that you be careful when reading the marketing data provided by some of the vendors of dry storage solutions. In many cases their conclusions are based on experimental data using a weight gain measurement technique. This is not consistent with the current industry standard which is based on a much more accurate moisture diffusion model. I can provide more details and technical references if you are interested. Regards, Francois Monette Cogiscan Inc. Tel : 450-534-2644 -----Message d'origine----- De : Steve Gregory [mailto:[log in to unmask]] Envoy=E9 : Thursday, August 21, 2003 11:19 AM =C0 : [log in to unmask] Objet : Re: [TN] Dry Cabinet Hi Yannick! We use the McDry cabinents here, and they work great. The humidity = level is kept around 4% RH, and that's not too bad..you know, it never gets hot = or humid here in Tulsa, Oklahoma (GRIN). Also, when I start running low on = beef jerky, I'll just throw a few slabs of beef in for a few days...(JUST KIDDING) You may think at first they are expensive, but when you figure the = costs of plumbing nitrogen, and the on-going expense of using the nitrogen, the = costs really aren't that bad. There's virtually no maintenance on them, as they self-regenerate the dessicant in them. You should send the humidity meter out annually for calibration, McDry will do that for you. In fact, they send you a = notice when yours is due for calibration. Camera dry boxes are kind of small, and the ones I've seen don't go = down to the low humidity levels that the dry boxes for electronics do. One good thing about desiccant cabinents, is that you can avoid baking = if the components are left in the dry box long enough. According to the = data, they will actually "de-humidify" the components bringing the absorbed moisture down to a level below where "pop-corning" or micro-cracking = can occur. There's two companies that I know of that make these desiccant dry = boxes. One is McDry (the ones I use), and the other is a company called Toyo Living. This last APEX show is the first time I've seen Toyo Living dry boxes. They supposedly are cheaper than McDry, and also contain heaters = that work in conjunction with the desiccant. Here's the links to both = companies" http://www.seikausa.com/mcdry/ http://www.toyoliving.biz/ Best regards, -Steve Gregory- Hi,=20 we'll use the cabinet for keep our QFP dry, we use to have a moisture probleme right now, I don't know the level of humidity/dryness to be maintained, cause it's maybe depending of the component, we don't what something complex, jsut a standard cAbinet not to expensive... Yannick --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------