Electronics Forum | Sat Feb 12 09:08:47 EST 2000 | Sal
Experiencing a problem with a 208 PBGA device. I am achieving good wetting with the exception of one ( damn) pin on the outer corner.I have a really good profile but the worrying thing is that it is so inconsistant. Once this open pin failure is dete
Electronics Forum | Wed Sep 08 13:36:27 EDT 1999 | Wolfgang Busko
| Hello: | We are using a Heller 1500S reflow oven to solder surface mount parts. Just within the last two weeks, the larger I.C.'s are moving while going through the oven. The parts are checked for placement before putting into the oven. When
Electronics Forum | Wed Sep 08 14:31:48 EDT 1999 | John Thorup
| | Hello: | | We are using a Heller 1500S reflow oven to solder surface mount parts. Just within the last two weeks, the larger I.C.'s are moving while going through the oven. The parts are checked for placement before putting into the oven.
Electronics Forum | Tue Aug 17 19:42:28 EDT 1999 | Carlos Palacios
| Looking for users of the Emerald pick and place.Comments on that equipment would be greatly appreciated. QFP and micro-BGA placement, idiot proff software etc. | | We just got a good offer to use that equipment for our training center instead of o
Electronics Forum | Fri Jul 16 15:22:27 EDT 1999 | SMTASSY
We are currently looking at purchasing an AOI equipment but would like facts from present users of such equipment. Our envirronment is as followed, - Runs from proto to 5000 boards of the same type. - 20% PTH, 60% Mixed (with some BGA) and the rest
Electronics Forum | Mon Jun 07 22:30:28 EDT 1999 | Dave F
| | | I was wondering what measurements are used to define pitch? | | | | | Frank: John's correct with the most common definition, but there can be others, depending on your perspective. TTYL Dave F | | | | Pitch. The center-to-center spacing b
Electronics Forum | Wed Apr 07 21:31:25 EDT 1999 | Scott McKee
| DOES ANY ONE KNOW HOW I CAN STRAIGHTEN | BENT PINS ON A FINE PITCH QFP WITH OUT DAMAGING | THE CHIP. AT $300 A CHIP I CAN'T SCRAP THEM. | I use tweezers and picks. I place the component down on it's backside (legs up) and manually tweek them un
Electronics Forum | Tue Jun 02 12:58:07 EDT 1998 | Michael Allen
"...the part is aligned to the pads with in 10% before going into the IR oven." Sounds like the pad pitch might be okay (?). If that's not the problem, then what? I wish I had the answer, because I've struggled with heavy QFPs for some time now (2
Electronics Forum | Fri Jan 16 23:33:32 EST 1998 | Scott
| Is there any way to implement SMT at home? | I want to assemble a prototype board of mine. | How can I hand-solder a 208-pin 0.5 mm lead | pitch PQFP -- lead-by-lead (the usual way), | or side-by-side (partial heating method)? | Alas, no SMD rework
Electronics Forum | Tue Jun 25 15:30:49 EDT 2002 | Steve L
Hi everyone. I am now faced with a problem on soldering PBGA. At first, I ran the board (FR4, 7" X 10" with 12 layer) at Peak Temp: 205 C and 54 seconds above 183 C. After reflow, I found several cold solder joints and one ball without second collaps