Electronics Forum | Tue Mar 22 20:33:24 EST 2005 | davef
Q1. What are you guys doing for filled/tented/plugged vias on the BGA site? A2. 2221A, 4.5.1 tells you the vias have to be tented on both sides. Q2. What type of issues can this cause if using no filled/tented/plugged vias on the BGA site? A2. BGA
Electronics Forum | Thu Jan 27 13:20:23 EST 2000 | Mike F
I would consider a Broker for equipment if I was getting something I was familiar with, such as a 2nd machine of a model I already had. The more complicated the machine, the more likely I am to go to an experienced rebuilder or approved remanufacture
Electronics Forum | Thu Jul 16 10:40:12 EDT 2015 | migliore
Hi, Question 1: can anyone explain me what the VIA ASPECT RATIO is? Question 2: Let's say that a PCB manufacturer specifies a VIA ASPECT RATIO of 8:1. Can I have vias of drill diameter of 0.1 mm on a 2L board 1.6 thick? thanks, Enrico Migliore
Electronics Forum | Fri Mar 02 09:08:25 EST 2007 | samir
There is a formula that determines whether a component will fall off during a 2nd reflow. It takes into account the grams (weight) of the component and the total surface area of the solder joints. I don't know this off the top of my head, but it's
Electronics Forum | Thu Mar 02 04:50:25 EST 2006 | bobpan
oh....for the feeders moving 2 parts....you must teach a pickup repeat. Make an extent in the pickup editor and attach it to repeat with pick and make it a 2x1 with an 80 mil offset. The machine will then pick the part that is out of the sensor first
Electronics Forum | Mon Jun 26 08:54:35 EDT 2006 | dougs
We have a new product in where a 0.7mm pitch uBGA is to be placed on a 2 layer flexi board. Also a 20thou pitch connector. Has anyone done anything like this before, what should i look out for. Not done much flexi work before so any tips will be g
Electronics Forum | Sat Nov 04 06:15:05 EST 2006 | James.li
I would like to know if it exist a croos reference book for marking code on smt device? I'm fixing a unit now and try to know what are the following devices: The look like mosfet and are mark like that "A2sKG",there are a horizontal line on top of "s
Electronics Forum | Thu Jul 17 17:40:13 EDT 2014 | proy
I just got a Vtek TM4400 used, and have manuals for most of it, however the operation/programming manual chapter 3 I have is for the newer Touchscreen interface. My unit is a 2 line backlit LCD with a membrane switch panel, I am looking for the oper
Electronics Forum | Thu Aug 14 22:22:30 EDT 2014 | proy
I just got a Vtek TM4400 used, and have manuals > for most of it, however the operation/programming > manual chapter 3 I have is for the newer > Touchscreen interface. My unit is a 2 line > backlit LCD with a membrane switch panel, I am > looki
Electronics Forum | Wed Sep 19 14:57:24 EDT 2012 | abielectronicsltd
Hello. I am trying to repair a PCB and have come across a damaged component. It has the letters "DNH" or "DNV", I think the H or V is a batch code so it will be a "DN", its a 2 pin SMT device, I guessing a diode. Does anyone know what it is? or is t
