Electronics Forum | Thu Mar 01 16:58:05 EST 2001 | davef
Last time we looked at this, JEDEC carefully designated the dimensions of the carriers, but "neglected" to define the component orientation with the carrier. Go to http://www.jedec.org/download/, search for JEP95 JEDEC REGISTERED AND STANDARD OUTL
Electronics Forum | Wed Jan 14 14:58:21 EST 2004 | Gilroy Misquita
I would like to know if there is an International standard for BGA and QFP polarity in trays for pick and place. How are these components placed on trays and is there a polarity of the tray itself? Please feel free to send me an email or reply on t
Electronics Forum | Wed Jan 14 18:33:21 EST 2004 | ex maintain leader
qfp tray one corner on the holder is 45 degree cutted there is the pin 1 bga also one corner is different in the tray at tape packaging I'm not sure, I have seen diferent comissions belong supliers
Electronics Forum | Thu Jan 15 12:55:03 EST 2004 | James
Polarity in tape and reel is usually always on the bottom left side. And that is correct for the trays, they have a corner taken out where the polarity goes. Hope that helps........
Electronics Forum | Fri Jan 16 07:48:29 EST 2004 | Mika
We usually program the components in the component database with pin 1 in the lower left corner. Then in the feeder database we set the component orientaion to 270 deg for Tray feeders(turn the tray in the feeder 180 deg) and "tube" feeders. For tape
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
Electronics Forum | Wed Apr 26 10:33:57 EDT 2006 | Carol Stirling
Hi Russ, The board was ran in two orientations but with poor results. The same area of the BGA failed. I was advised today that the Process Engineer here has come to the conclusion the defect is Pick and Place machine oriented, not a process/pro
Electronics Forum | Wed Apr 26 09:54:12 EDT 2006 | russ
So does the defect follow the part or the orientation of the board?
Electronics Forum | Thu Oct 28 23:45:23 EDT 1999 | DGrenier
JC: Seen this before, many times. We fixed our problems at the co I work for by giving a packaging specification to our purchasing dept. Took some work but the payoff was pretty big. This document includes such things as orientation,pitch,tape type
Electronics Forum | Tue May 23 09:58:35 EDT 2006 | flipit
I would take a BGA over a fine pitch QFP any day of the week. Unless it is a BGA with a high ball count, place them by the body if you don't have upward looking vision. Make sure your reflow process is good and the parts are placed in the correct o
