Electronics Forum | Wed May 10 22:58:52 EDT 2000 | Dave F
Michael: We all make choices. A first pass at yours is: Resin Tg�C Cost FR4 125 1 Tera Functional 135 1.1 Multi Functional 180 1.2 BT Epoxy Blend 210 1.5 Cyanate Ester 250 2 Polyimide 280 3 It's unclear about your meaning of "compat
Electronics Forum | Thu May 11 21:15:01 EDT 2000 | Dave F
Cecep Wahyu: A fairly broad topic for an online forum, don�t you think? 1 People write books on plating. Buy one: "Electroplating: Fundamentals of Surface Finishing" Lowenheim, FA (0070388369) "Graham's Electroplating Engineering Handbook" 4Ed, Dur
Electronics Forum | Fri May 12 16:17:30 EDT 2000 | Greenman
Yeah, 0201's are real buggers to deal with, as the components are about the same dimensions as the PWB tolerances. Probably a good start is the paper I did with Plexus Corp., available on www.plexus.com, under the "In the News" heading. Headlines: -
Electronics Forum | Wed May 31 23:19:15 EDT 2000 | Jackie Hsieh
I think the reasons of the tombstone phenomenon could be concluded as follows: 1.The proper pad size,including the dimension of two pads,the gap of two pads. 2.The temperature distribution must be uniform (take care the shadow-effect) 3.The ramp-up s
Electronics Forum | Wed May 03 20:22:36 EDT 2000 | Dave F
Peter: This isn't what you asked for (I think), but it may be neater. Source of SMT links (jumpers): Most resistor suppliers make zero ohm resistors. Size � 8mm - 10mm (.312in -.4in) long: Most resistor suppliers package these resistors in comm
Electronics Forum | Fri May 05 11:58:25 EDT 2000 | John Sims
We are using NR300F from Alpha. Topside board temp is 220 deg. F. We have 3 bottom side convection preheaters, and we use a foaming fluxer. The machine (except for the rotary chip wave) is almost identical to the old econopak. An electrovert appl
Electronics Forum | Wed Apr 26 22:34:49 EDT 2000 | Eric Chua
1. Verify all the part had load to machine. Get ready for the profile. 2. Run the board with double side tape. Is better to run one board for each machine. 3. Verify all the placement ( missing, misalgnment,etc )and check the value using meter for a
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 | Thu Mar 09 22:03:04 EST 2000 | Charles Leech
DaveF: Since these SMT "spounges" get wet in Singapore and they got to get dry in Singapore, the airfreight idea won't work. I don't think the airlines would be too thrilled with a teathered ballon floating 10,000 feet in the air over the city. STAT
Electronics Forum | Mon Mar 06 17:17:13 EST 2000 | gary
I need a little help with RF and Rogers 4003 board material. My background was in digital and now I need to set up a new line to make small RF products (.5" x .5" or smaller). I want to find out about board platings, finishes/maskings and reasonable
