Electronics Forum | Fri Feb 23 10:24:24 EST 2001 | johnthor
We still build a legacy product with a primitive backplane using silver plated fork terminals for outside world connections. After some 20 years of no problems the fork terminals on raw stock PCBs were black and almost unsolderable. Because of the
Electronics Forum | Mon Feb 22 10:01:01 EST 2010 | jtsyeung
Since the inductor is electro-magnetic, that means the device is composite of coil and ferrite metal. The inductor inside the reflow oven meets with blower motors which close to the inductor and generate magnetic field. With such conditions, Lawren
Electronics Forum | Thu Dec 22 10:37:38 EST 2005 | Amol Kane
Hi Steve, We just got the retrofitted machine and i was trained by PVA on Pathmaster. I just wanted to know if many other ppl were using it so i can post any questions/comments on the programming aspect. The coating we will be using is envibar, and
Electronics Forum | Wed Jun 23 13:34:29 EDT 2004 | df_indy
I am four weeks into my new job, there always seems to be some issues here with PCB every week. Today while I was checking some assemblies with micro-scope, I found a lot of tiny bubbles/blisters on the board. They are just little dots if you look
Electronics Forum | Fri Dec 13 19:01:14 EST 2002 | Tooling Guy
I have heard of people using tiny lead-shot filled bags to hold down thru-hole components on circuit boards while running through a wave solder machine on selective solder pallets. How successful has this been? What kind of material is being used f
Electronics Forum | Wed Jul 30 00:47:10 EDT 2014 | matusov
Hello gurus, I am a hardware designer with a small company. We are about to send a new PCB for fabrication. This board uses dozens of tiny QFN, DFN, and similar packages. As a final check I have been going through the datasheets of all these parts t
Electronics Forum | Fri Jan 17 22:08:31 EST 2003 | iman
try using thermal pads under the area without the balls. yeah, its a pain but we did it before for lot run of 500pcs BGA. Not feasible for mass production run, you say? well, thats why there's a thing called DMF, and why its the designer guys res
Electronics Forum | Fri Aug 21 13:43:13 EDT 1998 | Ben Salisbury
| Hello everyone, | I am currently running a gold plated SMT board and am experiencing tiny solder balls between the pads and the masking between the 20 mil pitch devices. I'm looking at these boards with a 60x microscope. IPC-610 say's any visible s
Electronics Forum | Tue Oct 04 08:10:29 EDT 2016 | philc
We have a "Blundell Stencil Cleaner" screen washer here, and if boards are badly printed, we put them in the wash, then dry them off thoroughly and reprint them. There are small, insignificant signs of tiny solder spheres afterwards, but nowhere near
Electronics Forum | Thu Jun 23 16:08:49 EDT 2005 | slthomas
It's interesting that your company was willing to buy enough machines to complete 4 lines, but isn't willing to buy enough parts for them to operate. That sort of reduces your 2-4 lines to a role of emergency spares locations, doesn't it? We experie
