Electronics Forum | Tue Sep 14 11:26:18 EDT 2004 | Simon UK
Hi All, Ok, now i have hit a brick wall with our design department and due to limited space on our standard sized boards we are going down the Double-Sided route. We have a 8 zone (4 Top/Bottom) Quad ZCR Convection (Ok! you can stop laughing!) and
Electronics Forum | Wed Sep 15 17:53:53 EDT 2004 | aaronrobinson
My question is how does heat alone (125DegC for 48hours) diffuse the water vapour in a component, I figure the amount of water vapour in grams per cubic cm will be the same regardless of temp...yes with temp the RH changes but once the component rea
Electronics Forum | Sun Sep 19 10:54:24 EDT 2004 | rohman23
This (along w/ everything else we do) is not high volume. Actually, we're dropping a batch of 7 the first of the week, and that's fairly sizeable for us. I talked with my stencil design folks and sent them a scrap board and all my gerber info. I t
Electronics Forum | Tue Sep 21 10:50:21 EDT 2004 | Andy
We are in the same position like you. We are in a tug-of-war with our QA with regards to this process. Their reason is that the machine is used for quality purposes which is to verify BGA solder quality so it must be under Quality. From my experience
Electronics Forum | Sat Sep 25 08:59:59 EDT 2004 | davef
IPC-HDBK-830, Guidelines for Design, Selection and Application of Conformal Coatings says: A conformal coating may have several functions depending on the type of application. The most common are: * Inhibit current leakage and short circuit due to h
Electronics Forum | Thu Sep 23 10:48:21 EDT 2004 | Mke
Hi, My experience in the past has been predominantly with Fuji, Universal and Siemens. I categorise each of these systems in different ways; 1) If I want bombproof reliability - I Choose fuji. There tough mechanical design ensures operation time
Electronics Forum | Fri Sep 24 22:43:07 EDT 2004 | FengAng
Hi Rob, We use the most advanced equipments in front end, but the back end we always use manual assembly, including display, LCD, casing. It's all because we should balance the cost & efficiency. I think if you are the boss, you will also do thing
Electronics Forum | Wed Sep 29 12:10:53 EDT 2004 | Simon Uk
Well for us 'limeys' its more difficult holding on to a job in the OEM/CEM marketplace. There are very limited opportunities for moving to other jobs here, we too like the US are losing a 'hoard' of jobs to China,India and other cheaper climates. Pr
Electronics Forum | Fri Oct 08 09:43:27 EDT 2004 | davef
First, don't get too excited about the thermal capabilities of conductive epoxy. An epoxy like DuPont CB-100 increases the amount of heat conducted through the barrel, but many over estimate what it can do. Calculations show for a 0.020" drilled
Electronics Forum | Mon Oct 11 17:06:55 EDT 2004 | M Deren
We have a DEK 260 with a intermittent table align stepper motor problem. The machine will work fine for awhile and then one of the table align motors starts either moving haphazardly in small increments back and forth or vibrates as if it wants to mo