Electronics Forum | Fri Jun 18 15:39:47 EDT 1999 | Earl Moon
| What's wrong with the Tin? Just wondering | | MDCox | | | | Electroless silver had promise, from Alpha, but I don't know where this ended up. Also Omikron's "white" electroless tin is proported to be a good alternative, though I've never been a
Electronics Forum | Tue Apr 20 23:59:54 EDT 1999 | Scott Cook
| Jeez, | | I just about had a fine Mexico thing going, or was that in my dreams? Probably, but thanks for the future X possibility. Steve, I must say I totally disagree with your assessment of under screen cleaners. I have had nothing but excellent
Electronics Forum | Mon Mar 01 11:03:51 EST 1999 | Dennis Xiong
Hello! SMT professionals, I do not know if anyone posted this question before. Last week, I reflowed our newly designed thin Rigid-Flex pcb with 0.040" thickness. I found all of pins of a TQFP48 ic did not get wetted. I could see on the heel side o
Electronics Forum | Mon Mar 01 11:03:22 EST 1999 | Dennis Xiong
Hello! SMT professionals, I do not know if anyone posted this question before. Last week, I reflowed our newly designed thin Rigid-Flex pcb with 0.040" thickness. I found all of pins of a TQFP48 ic did not get wetted. I could see on the heel side o
Electronics Forum | Thu Feb 18 17:49:28 EST 1999 | Ryan Jennens
Hey all- My question is this: My stencil printer operator has said that he has to wipe our 6-mil stencil each pass to get the paste in the 20-mill pitch aperatures for a QFP to release well. We are using Amtech NC-559 type 3 paste with 89.5% metal
Electronics Forum | Thu Feb 18 17:06:33 EST 1999 | Dave Jurena
| Hope some of you out there can help me with this one. | I am getting feedback from our test department that they are showing opens on solder joints which have visually good wetting. The touch-up operators confirm that the joint looks good. All they
Electronics Forum | Fri Feb 12 18:48:19 EST 1999 | Jon Medernach
Bill, You should wipe clean. The thin layer will dry out quickly and cause other problems. Remember squeegee down stop and squeegee pressure are seperate issues. If your downstop is to low the stencil and board will flex down, after the squeegee p
Electronics Forum | Sat Feb 13 07:57:42 EST 1999 | Kelly
| I am fairly new to the SMT game and I am getting conflicting answers to the following. Maybe someone can help me! When printing, one person is telling me that the stencil should be wiped completely clean of all paste because the quality of the
Electronics Forum | Tue Feb 16 08:54:57 EST 1999 | Ross Berntson
| I am fairly new to the SMT game and I am getting conflicting answers to the following. Maybe someone can help me! When printing, one person is telling me that the stencil should be wiped completely clean of all paste because the quality of the
Electronics Forum | Fri Jan 15 11:26:24 EST 1999 | Chrys
Hello, We are qualifying new sources of PWB vendors. We've got the first lot of "produciton" boards in and we want to put them through the paces before turing the vendors on. So far, the tests I can think of performing, and that we have the capabi
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