Electronics Forum: surface tension (Page 26 of 30)

MELF component short togehter

Electronics Forum | Fri Jun 14 14:25:05 EDT 2002 | davef

Good job clarifying things. So, your MELF are just rolling off the pads. So much for the rocket scientist that talked you into those �V� shaped apertures, eh? [Or taking it the other way: Wow, just think how bad it would be if they weren�t worki

RoHS Issues

Electronics Forum | Thu Apr 19 08:50:38 EDT 2007 | rgduval

Welcome to RoHS. Or, at least, to the version of RoHS that I've had to deal with since I started with my current company. Blowholes and pinholes seem to be common in PB-free manufacturing. At least, they have for me here. I also note that IPC has

Philips/Assembleon GEM Feeders 'Sugglish'

Electronics Forum | Mon Jun 30 01:30:14 EDT 2008 | benefon

Hi Well as the feed movement is effected by means of a spring return force there really isn't that much to do apart from checking the spring tension and keeping the friction surfaces of the ratchet mechanisms of the feed sprocket and the top foil pu

Re: help help! Water clean for CSP/BGA package

Electronics Forum | Tue Oct 05 14:38:06 EDT 1999 | Debbie Alavezos

Hi, Help! Could anyone help to enlighten me on this? Question: If I have a CSP/BGA package of size X by Y and the standoff gap between the component and PCB is Z, What is the maximum allowable Y/Z or X/Z that using a n

Re: Off Pad Printing

Electronics Forum | Mon Jun 28 21:07:00 EDT 1999 | Deon Nungaray

Hey there gang, how's it going ? Anyway's here's my probelm, got a new product to build double sided reflow, lot's of so20's and PLcc's 1206's, 0805's the usual stuff. Probelm is all the pad spacing of the 1206's are too big, my component's ar

Re: Intrusive reflow..from the bottom..????

Electronics Forum | Fri May 21 15:29:26 EDT 1999 | JohnW

Joe.. Sound's pretty neat trick..mind if I ask what type of comp's are on this board and the paste..? This baby (pig I think) has got a 244pin QFP right dam in the middle..!, so if ur flipin it 180 degree's are u using like a piece of Jot in line co

Re: Transient Voltage Suppressors

Electronics Forum | Fri Mar 12 20:19:46 EST 1999 | Dean

AVX and a few other companies make these chip transient voltage suppressors (TVS) parts that are a real *PAIN* to use. According to AVX: "Due to the semiconducting nature of the doped Zinc Oxide (ZnO) ceramic material, SMT TransGuards ar

Re: double sided boards - process / design issue.

Electronics Forum | Tue Sep 22 13:14:27 EDT 1998 | Chrys

We are getting into a lot of double sided boards offlate. Our customer is loading a lot of RNETS, Diodes ( MINLS, SOT23s and other 2 leaded diodes ). We are processing it through a traditional glue process and wave soldering the SMT parts along wit

Re: reflow theta alignment

Electronics Forum | Fri May 29 13:42:34 EDT 1998 | Steve Gregory

Hi Jason! I can probably find something documented for you, but the easiest way to convince your QA people is just to show them. If you have a board around that has some 1206 locations all in a row, print the board with paste and then plac

Re: reflow theta alignment

Electronics Forum | Fri May 29 16:12:11 EDT 1998 | Jason Gregory

Hi Jason! I can probably find something documented for you, but the easiest way to convince your QA people is just to show them. If you have a board around that has some 1206 locations all in a row, print the board with paste and the


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