Electronics Forum | Fri Mar 24 15:20:27 EST 2000 | Chris McDonald
I have recently purchased a Tape and reel machine from V-Tech. We are using Presure Sensitive tape and we are not geting good results. Anything bigger that a SOIC14/16 gives us trouble. The cover tape will pull off on the feeder and we will lose part
Electronics Forum | Wed Oct 10 13:35:00 EDT 2001 | stepheno
I used to work with Chris. (neither of us are there anymore). What is he talking about is putting components into "pockets". The parts would come in, in sticks (tubes) but we wanted them in reels. At first we sent them out to be reeled, but that w
Electronics Forum | Fri Mar 24 13:02:53 EST 2000 | Ashok Dhawan
Two questions on ESD: 1. What is recommended method ( Air ionizer , grounding strip etc. ) for a board prep ? We Kapton Tape for masking pads or not to be soldered areas. or Is there a wet mask recommended for masking boards campatible with NC Sold
Electronics Forum | Fri Mar 24 03:06:35 EST 2000 | Sal
guys Using a well estrablished water soluble solder paste, but having problems with tack time. Data sheet recommend a couple of hours but we are seeing problems after about 15 minutes with 0402/0603 componenets bouncing off. The printer environment
Electronics Forum | Thu Mar 23 00:37:47 EST 2000 | Donnie DeYoung
Thanks guys. We are currently using an Opti Flux fixed spray head at 10 to 20 psi. We were using the 351 flux at 60 psi before this, so as you can see we found that there's a huge difference here. We are currently running a conveyor speed at 5.0 FPM.
Electronics Forum | Mon Mar 20 20:22:47 EST 2000 | Dreamsniper
We used to have our PLCC,s, TSOP's and QFP's (0.65 mm pitch) Land Patterns designed in square corners. Some of our products have them designed in Full Radius Corners. As of now, with the two different designs running in our production floor, we can't
Electronics Forum | Tue Mar 21 16:25:23 EST 2000 | Boca
Full radius corners on pads can help with solder paste release in the stencil. The radius shape minimizes the surface area in the wall of the stencil aperture as compared to a sharp corners. When the stencil is seperating from the pcb the solder pa
Electronics Forum | Mon Mar 20 15:48:52 EST 2000 | Shane Lay
We are planning on converting to a no-clean soldering chemistry and will need to replace our water soluble liquid solder mask as a result. Does anyone know of a dispensable, "peelable" solder mask I can evaluate? It would be nice to find one that i
Electronics Forum | Thu Mar 23 08:34:45 EST 2000 | Shane Lay
Dave, Thank you for the information. We will be conducting several tests in the near future that will evaluate the corrosion/contamination response as it is our primary concern once we remove our aqueous processes. We are well aware of the effects
Electronics Forum | Mon Mar 20 16:37:41 EST 2000 | JAX
Long time, no see Doc. If you want to use an SOJ algorithm you can probably get away with manipulating the height of the part to get the lighting to refract in the areas you need to. Beware of parts parachuting if you adjust to much, although you sho
.gif)
