Electronics Forum | Thu Oct 22 21:13:39 EDT 2020 | SMTA-60697423
Manufacturers involved in critical product cleaning may be aware that the U.S. EPA may ban or highly restrict the sales and use of n-propyl bromide in manufacturing. The EPA is interested in the impact on small businesses including costs and performa
Electronics Forum | Sun Mar 28 18:49:36 EDT 2021 | mekmat544
Hello, I would like to ask you if there is some formula how to calculate PTH hole and annual ring for pin in paste technology? Thank you. Mekmat.
Electronics Forum | Thu Jun 10 19:10:05 EDT 2021 | kojotssss
Hi, Get your account. https://software.indium.com/stencil-coach/pin-in-paste-apertures.php
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 | Fri Jul 25 15:54:22 EDT 2008 | pcbbuilders
I am trying to optimize my reflow profile. i have a 5 zone oven. lead-free: for the 1st 3 zones, i am good, at about 150-200 deg for 150 seconds. during the 4th zone, i am at a temp of 200-220 for 50 seconds. during the 5th zone, i am at 220-245 f
Electronics Forum | Fri Jul 25 23:01:04 EDT 2008 | chip_flip
What paste are using? You should referance the manufactures time and temperature specification. Running lead-free in a 5 zone oven can be done with out a problem but it is not production friendly. If you are concerned with through put I would look fo
