Dear Wee, a condition for answer is that you stop using 'Sorry' and 'stupid question'. We are all on the same level, stupid questions do not exist and you are probably hiding behind a very good education grade. The answer on your question depends on a lot. If your machinery is professionally installed, there should be no problems at all. However, if the shutdown admits outer atmosphere to fill your cleanrooms (overpressure stopped), there may be some issues. Also, when the machinery starts again, there may be pressure bursts or swings that frees particles and dust to come in circulation. If you plan a stop, it's just to remove paste jars and patrons, set protection cover on and take other measures. We have had emergency stops several times and we have never had any problems of the kind you fear. If you don't open fridge doors, nothing will happen more than you'll have to take care of some water and/or defrost. Normally, the materials you mention are not sensitive to single minus drops or humidity swings. Inge -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Lum Wee Mei Sent: den 20 juni 2007 09:09 To: [log in to unmask] Subject: [TN] Power Supply Maintenance - Impact Hello, Is there a concern to clean room, humidity cupboards and fridge (solder paste, adhesive, epoxy) during a 24-hr shutdown due to power supply maintenance? SORRY for such stupid question. Thanks and regards, Wee Mei --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 847-615-7100 ext.2815 -----------------------------------------------------