Electronics Forum | Fri Dec 17 08:45:26 EST 1999 | Wolfgang Busko
Hi Henry, amoung all things that cause this funny effect the most effective measures in my experience were good PCB design (pads and equal thermal conditions for both sides of the components), placement accuracy and profiling, profiling, profiling. L
Electronics Forum | Thu Dec 02 23:43:23 EST 1999 | Kantesh Doss
We have a serious misalignment problem of D-Pak components (Specifically Motorola's part number MJD-3055/MJD-2955)following reflow soldering process. We are using Alpha Metals UP78 solder paste. Our reflow oven is Nitrogen inerted and our oxygen leve
Electronics Forum | Thu Nov 18 08:43:30 EST 1999 | Will Buehler
We currently stuff parts on one side and use a reflow oven. We have been told that many companies are stuffing both sides without high-temp solder or glue. I understand that glue is usually only needed for wave soldering processes. Is it true that
Electronics Forum | Thu Nov 11 18:28:10 EST 1999 | John Thorup
Hi Jeff Actually it's not necessarily Signal to Noise Ratio or even RF circuitry. All no cleans leave behind residue by description. This residue can affect RF or other high frequency circuits in a number of different ways including SNR. Very high
Electronics Forum | Tue Nov 09 05:14:49 EST 1999 | Wolfgang Busko
Hi all, our problem we face is the mismatch of conductor width on the delivered PCB and the nominal width given by CAD-data. With CAD we are improving pads and conductors to match the specific needs for soldering and the board houses counteract our i
Electronics Forum | Tue Nov 09 11:32:32 EST 1999 | Dave F
Wolfgang: "Our desire is to get what we design" ... Wanting to get what you ask for ... ummm sounds like a risky proposition!!! ;-) Two things: 1 Go to the Hadco site and get their "boiler-plate." Use it and some of the Earl Moon specs in the SMTn
Electronics Forum | Sat Nov 27 10:16:38 EST 1999 | Steve Thomas
The new design resulted in much better release characteristics. We are quite satisfied. By the way, he says he can cut dead nuts 90 degree walls on the apertures, or traps. I didn't ask what the wall angle was, nor have I seen any recommendations,
Electronics Forum | Thu Nov 04 13:45:29 EST 1999 | Scott Cook
Hi Chris. Can't specifically address optos, but I have spec'd RH requirements and Temp requirements for new facilities I helped design for manufacturing here in FL (humidity center of the universe). For an overall benefit, I considered the potential
Electronics Forum | Wed Oct 27 10:22:15 EDT 1999 | a.blair
Fuji is usually the cheapest you will find. I think around $750 for them to repair it. the last time I checked they have an exclusive patent on their PCB backplane design so there would not be any real way to bench test it. they also have rights to t
Electronics Forum | Wed Oct 20 04:42:02 EDT 1999 | park kyung sam
we did this for pad design of pcb and can also use it off- line programming for mounter. we had checked out all the component we used in our factory. we sorted 600 kinds parts using part size(L,W,T) ,number of lead ,shape with over 6,000 parts. a
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