Text item: Anybody, Any ideas if i had stored the paste at either -20C or at 20C for a minimum of 1 month? Thanks, Siegfried ______________________________ Reply Separator _________________________________ Subject: Re: ASSY: Solderpaste storage Author: [log in to unmask] at SMTPGATE Date: 4/15/97 12:09 PM Siegfried, I've used Kester 244 (RMA) quite extensively and find it to be a very forgiving paste with wide process windows, and very easy to clean. At 10 deg C for an unopened container, I suspect you would have no problem with a storage time of 6 months from date of manufacture, after that I'd start doing solderability tests depending on your specific requirements (or just watch your results carefully). I've had some at 5 deg C. for over a year and still have seen no performance loss. As far as the -10 deg C, I don't have any input, perhaps others do. I'd be interested in knowing that also. I suspect there would be no problem as long as the paste is allowed to warm to room temperature before being expose to air (and resulting condensation). Larry Morse Celwave RF [log in to unmask] -From: Siegfried Quemado <[log in to unmask]> Subject: ASSY: Solderpaste storage Date: Tue, 15 Apr 97 09:39:00 PDT --------------------------------------------------------------------------- We're currently using Kester R244 and if anybody out there has used this paste, please share with me your experience with this paste and how it performs when it has been stored at relatively "extreme" temperatures, such as -20C and 10C. We are currently storing ours at 4C and we would like to determine what our storage tolerances should be. We are looking at a window between -10C and 10C. Also, has anybody used this paste after it has been stored at around 8 hours at approximately dry ice temperature? What do you suppose would happen after paste stored at this cold temperature is reflowed? Regards, Siegfried Quemado [log in to unmask] *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * *************************************************************************** Text item: External Message Header The following mail header is for administrative use and may be ignored unless there are problems. ***IF THERE ARE PROBLEMS SAVE THESE HEADERS***. Resent-Sender: [log in to unmask] Precedence: list X-Loop: [log in to unmask] X-Mailing-List: <[log in to unmask]> archive/latest/11990 Resent-From: [log in to unmask] Resent-Message-ID: <"ID1TL2.0.tEA.5szKp"@ipc> Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII Mime-Version: 1.0 Organization: Unregistered version of SpikeMail X-Mailer: SpikeMail 3.10 To: [log in to unmask] Subject: Re: ASSY: Solderpaste storage From: "Larry Morse" <[log in to unmask]> Date: Tue, 15 Apr 1997 12:09:23 -0800 Message-Id: <[log in to unmask]> Old-Return-Path: <[log in to unmask]> Resent-Sender: [log in to unmask] Received: by ipc.org (Smail3.1.28.1 #2) id m0wHELk-000BlnC; Tue, 15 Apr 97 14:57 CDT Resent-Date: Tue, 15 Apr 1997 17:28:42 -0700 Received: from ipc.org by simon.ipc.org via SMTP (940816.SGI.8.6.9/940406.SGI) id RAA17625; Tue, 15 Apr 1997 17:28:42 -0700 Received: from simon.ipc.org ([168.113.24.64]) by ormail.intel.com (8.8.4/8.8.4) with SMTP id PAA29733 for <[log in to unmask]>; Tue, 15 Apr 1997 1 5:47:00 -0700 (PDT) Received: from ormail.intel.com by relay.hf.intel.com with smtp (Smail3.1.28.1 #2) id m0wHH23-000qDNC; Tue, 15 Apr 97 15:48 PDT *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************