'twas Austin American Technology http://www.aat-corp.com/ > -----Original Message----- > From: Timothy Reeves [SMTP:[log in to unmask]] > Sent: Monday, July 09, 2001 9:33 AM > To: [log in to unmask] > Subject: Re: [TN] Bare board cleaning > > FYI Larry, > ECD sold its cleaner division to a company in Texas a while back and no > longer makes washers. That division was up in Milwaukie (Oregon) and we > (the board shop) are down in Mulino, about 15 miles south, so I wasn't > directly involved with washers. That's why I don't remember who bought the > cleaner division. > > Timothy Reeves > QA Manager/Process Engineer > ECD Circuit Board Division > 13626 S. Freeman Road > Mulino, OR 97042 > Tel (503) 829-9108 Fax (503) 829-5482 > > [log in to unmask] <outbind:[log in to unmask]> > > <http://www.pcbpro.com/> > > -----Original Message----- > From: Larry J. Fisher [mailto:[log in to unmask]] > Sent: Friday, July 06, 2001 9:34 PM > Subject: Re: Bare board cleaning > > > 1. Many board shops will do a final clean operation (typically a > saponifying > heated detergent spray rinse, tap water and final DI water rinse), > just prior > to the boards being packaged and shipped to the customer. This is > done to > remove any contaminants that can arise from handling when the panels > are > routed into boards, electrically tested, etc.This is primarily > done to make > sure the boards are clean when they leave the board shop, look good > and will > meet ionic cleanliness requirements if a random sample is selected. > You might > want to contact your board supplier(s) to see if the do this final > clean > step. If so, you probably would not need a pre clean prior to > assembling the > boards. > > 2. There are some assemblers that do use dish washer type machines > to clean > fully assembled boards. In fact, ECD in Oregon makes a dish washer > type > machine specifically for cleaning assembled boards. The down sides > are that > the machines will only hold a few boards (no good for any kind of > volume > production), the cycle time is quite long (up to 1 hour - similar to > a dish > washer) and the assembled board is subjected to long exposure in a > very high > temperature/high humidity environment. I would think the solvent > cleaning/vapor degreasing you are now using would be a better > approach, > especially with the RMA solder pastes you are now using. > > Hope this helps. > > Larry Fisher > > Allen Woods & Associates > --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------