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 | Tue Jan 13 19:16:03 EST 2004 | pjc
Dedicated tooling uses what MPM calls an "H" tower. You mount the board support plate (dedicated tooling) on top of the H tower. If boards are only single-sided SMT, meaning only components on one side, the board support plate is flat with vacuum hol
Electronics Forum | Thu Jul 06 13:36:37 EDT 2006 | SWAG
We've had much trouble with flex circuits. As previously mentioned, you must have local fids for the board or the BGA itself (if panelized). Other troubles we experience are drilled holes for pinned connectors. Unless the PCB manufactur has some w
Electronics Forum | Tue Dec 09 08:51:56 EST 2008 | pjc
256 LT or Lite, low end fully auto machine, lower res alignment camera, not as accurate and repeatable as GSX. Wiper and Auto Paste dispensing optional. GSX is fully loaded with hi end camera alignment, auto paste, vac stencil wiper, may have auto fl
Electronics Forum | Mon Jul 23 05:40:58 EDT 2012 | franks
We are having a problem with a 601 pin BGA in that the corners of the BGA are lifting and taking the pads with them. Faults are not always seen straight away so we are not sure at which point the fault is happening. So far it looks as though flexing
Electronics Forum | Mon Mar 01 12:50:47 EST 1999 | justin medernach
| 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 hee
Electronics Forum | Mon Mar 01 22:37:01 EST 1999 | Dave F
| 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 hee
Electronics Forum | Mon Feb 20 17:56:46 EST 2006 | Chris
If you are running FR4 PCBs and not something exotic like Kapton flex circuits, I would go with the Dek 265 any day of the week. You will find that Dek supports the fully automatic printer much better than the semiautomatic printers like the 260, 24
Electronics Forum | Wed Jul 14 18:51:24 EDT 2010 | rway
Thank you. I spoke with our SMT guy, and he stated that there is plenty of board support on the pcb. So it's not a matter of flexing. There just seems to be inconsistancy in the solder application. He did mention that part of the problem is a lac
Electronics Forum | Wed Aug 12 14:39:09 EDT 1998 | Mike C
| Have an SRT w/preheat, 18 layer board all copper, 456 BGA needs to be removed and replaced. The manufacturer is Chip Express and during reflow it warps up or down. Causing either opens or shorts on the corners. I was using gel flux with multiple
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