Electronics Forum | Fri Jul 11 13:04:13 EDT 2003 | fmonette
Hi Chris, Yes there is a limit to the bake cycles : "...the cumulative bake time at a temperature greater than 90C and up to 125C shall not exceed 48 hours. If the bake temprature is not greater than 90C, there is no limit on bake time..." Ref: J-S
Electronics Forum | Mon Jul 21 08:34:44 EDT 2003 | Don Bell
Blow holes/ pin holes in solder joints are the result of multiple root causes. Suggested analysis might look like this; 1) What method of solder preservation is used on the bare board. (hasl,enig, osp, etc.) HASL can leave unwanted flux residues,
Electronics Forum | Mon Jul 21 20:42:12 EDT 2003 | iman
Don, thanks for the thoughtful insight, can I run some thinking points for your further assistance? 1) ours is a Au over Ni PCB bareboard. Do you think excessive Au thickness is any way a influence for poor solder formation? I did notice the PCB ba
Electronics Forum | Fri Jul 18 10:46:43 EDT 2003 | davef
If you are saying that you have discolored white tin at in-bound inspection, you have bad boards. The boards are fabricated incorrectly. Your fabricator is deficient. That is the GREAT thing about imm coatings. You can look at them and determine
Electronics Forum | Fri Aug 15 16:32:51 EDT 2003 | stefwitt
Assuming you are not looking into an orchestra sound with Bose loud speakers, you can play the melody with a buzzer creating sounds like the ones from cell phones. The melody has to be stored into a programmable device, such as an EPROM. In order to
Electronics Forum | Tue Aug 19 09:23:18 EDT 2003 | caldon
FUJI DUDE- You can purchase a Kit from IPC for verifying machine acceptability. IPC-9850 full kit with Components and boards, and such will set you back around $26,250 (member price). Just the glass board alone will cost you $3,800 (member Price).Thi
Electronics Forum | Thu Aug 21 21:05:39 EDT 2003 | Tom B
Dan, We, do alot of double reflow. Your right we typically see alot of the standards components, SOT's, SOIC's, Chip stuff. The largest we do with out adding epoxy is some 32pin PLCC's. We have several assemblies were were doing PLCC44's, Sockets
Electronics Forum | Thu Aug 21 22:10:07 EDT 2003 | adlsmt
Well, for some reason the board house will pay for the boards but has some issue with paying for the parts on them. Why am I not supprised? Perhaps I have mis-diagnosed the problem. We have found two different board p/n's with the same type of defec
Electronics Forum | Fri Sep 12 00:19:37 EDT 2003 | Dean
In my humble opinion: 1. Use of computers and software to support cad programming and industrial automation. 15 years ago I was making programs with a pair of calipers and a swing arm digitizer. Now in a few hours an entire line (2 P&P machines,
Electronics Forum | Thu Sep 18 11:07:39 EDT 2003 | donbell
SR. Tech: I have worked with Omniflo 7 and 10 ovens for many years. I purchased several 10 zone ovens in '98 when I worked for Ericsson. Here are some of my experinces with Electrovert Omniflo ovens; Yes, you can expect to run the conveyor speed a