180 ipc and a and 610 results

Electronics Forum: ipc and a and 610 (Page 7 of 18)

Bow and twist of PCB's

Electronics Forum | Fri Apr 20 07:12:22 EDT 2001 | wbu

Dougie, oh yes, it�s a bit short that chapter. I have the Revision e in front of me and this one contains in the appendix the needed IPC-TM-650 Test method for bow and twist. Can�t think that they don�t have that in the new revision. Hope you find

V-scoring design and equipment questions

Electronics Forum | Mon Jun 12 18:44:30 EDT 2006 | muse95

OK, Pete, I just looked all through IPC-A-600G. Saw no mention of scoring anywhere. Please provide specific section number info. Thanks By the way, Chris, thank you for the information - that is really interesting stuff. Would you be willing to a

Re: BGA and Land Patterns

Electronics Forum | Wed Apr 28 14:41:45 EDT 1999 | Bob Willis

| | What is the current spec for sizing PCB pads for a land grid array? How about for a ball grid array? Are there industry spec's I can reference? | | | | Thanks, | | | | Frank | | | Frank, | Refer to the device manufacturers. they are going t

Bow and Twist of PCB's

Electronics Forum | Wed Aug 19 05:00:56 EDT 1998 | Tom Blum

Hi there, I'm actually facing a lot of trouble with PCB's presenting up to 3mm of bow /twist at reception i.e. before assembly. The PCB size is 220 by 230mm. The boards are to be assembeled SMD double sides with 05.mm pitch on both sides. In order to

Fuji Pick and Place Machines

Electronics Forum | Sat Jun 05 08:18:03 EDT 2004 | vinitverma

Hi Grant, If you're really looking for speed, I'm sure you're looking for another machine for doing the QFPs, BGAs stuff etc. In that even, why not have a look at the long proven Assembleon FCM machine!! It is a totally different concept with UNMATC

Solder beads and wave soldering

Electronics Forum | Thu Jul 06 03:03:56 EDT 2006 | ronalds

Thank you all for your input. The MF300S Multicore flux is rated for lead free. There is not much dross or contamination. We are using nitrogen. I've tested the boards with the curing test of IPC-TM-650. I think you're all right about the preheat.

board stretch and IPC -D-300G

Electronics Forum | Mon Nov 12 16:14:47 EST 2001 | davef

Yes!!! How can we assemble boards with 20 pitch when we allow 0.008� error to the master art? Excellent question!!! IPC-D-300G has nothing to do with assembler requirements. It is written by and for fabricators, so that they can be comfortable.

wave soldering and solder bridge

Electronics Forum | Mon Dec 17 11:55:08 EST 2007 | chef

I recently had the same problems, solder bridges on every thing I made, different customers boards, etc. I wave with no-clean flux. As I sorted out problems (pin holes, blow holes, splatter, etc.) I found a lot of variable factors. I changed flux,

BGA and QFP orientation in trays for pick and place

Electronics Forum | Fri Feb 06 03:56:47 EST 2004 | JaMi Smith

BGAs and QFPs packaged in Trays are oriented with Pin 1 or corner A1 oriented towards the Pin 1 identifier on one corner of the Tray, which is usually identified by a chamfered corner. The Trays themselves are usually governed by JEDEC Registered Ou

J-STD-002 and -003 solderability testing...

Electronics Forum | Sat Jun 30 11:03:29 EDT 2001 | davef

Nice to have you back on SMTnet. Some of the newer folk have missed-out on the solid contributions you�ve made to the Forum. The chicken wire cleaning basket was a classic!!! [It�s a shame that the folk at SMTnet can�t recover those files.] We bu