Electronics Forum: extreme (Page 27 of 52)

Re: Cleaning PCB'S after rework ect.

Electronics Forum | Sat Sep 05 18:51:34 EDT 1998 | Graham Naisbitt

John, I believe that your problem is cuased by inadequate filling of the transformers with potting material - if any is used at all. When you attempt to clean, particularly with a chemistry, it is designed with wetting agent, surface tension modifier

Re: Solder paste inspection

Electronics Forum | Mon Aug 10 10:58:01 EDT 1998 | Justin Medernach

| | I am trying to get an idea of what system seems to work best for solder paste inspection. I am looking for basic table top models with he capabilites of height and width measurements. Can anyone give me suggestions, pricing and why you prefer

Re: SECS/GEM what EXACTLY do you want?

Electronics Forum | Mon Jun 15 22:00:52 EDT 1998 | Jon Medernach

As an equipment vendor (Panasonic Create group)I am extremely interested in GEM/SECS. It is really a nebulous concept. Everyone I talk to wants something different but it's all lumped under GEM/SECS! I ask a simple question. What do you want it to

Re: solder paste in Flipchip

Electronics Forum | Tue Feb 24 01:19:01 EST 1998 | Jon Gruett

You are right !!! The exact volume of solder paste onto flip chips is extremely critical. Only one vendor that I know has taken that part of the process to the next level, whereby they can effectively deposit the right amount onto the flip chip exa

Re: Forced Air Convection Ovens

Electronics Forum | Fri Jan 09 09:48:24 EST 1998 | Wendy Casker

| We are currently in the process of analyzing Forced Air Convection Oven systems. The systems in the running are the Electrovert, Vitronics, Conceptronics, and Seho. Service is a big requirement for us. Our plant locations are in Dublin, Ireland

Water soluble solder resist masking

Electronics Forum | Fri Dec 12 10:28:30 EST 1997 | David Syracuse

I am interested in locating a water soluble resist mask that does not leave a residue after wash and is easy to work with during the screen printing process. I have tried the Alpha Metals 110 and 220 solder mask and have found that it does not leave

Why is NC the prefer process for BGA mounting? why not WS?

Electronics Forum | Tue Aug 21 03:42:55 EDT 2001 | mugen

SMT community, My Fellows, 1) why is No-clean (NC) the preferred process, for BGA mounting by SMT? 2) why is water-soluble (WS) not a hot choice? 3) All I know, *is in layman terms*, that BGA has tendency to trap water, should WS process be the c

board stretch and IPC -D-300G

Electronics Forum | Mon Nov 12 13:04:35 EST 2001 | slthomas

We've got a problem with a fine pitch board that has about .005" registration error at each end (towards the center of the board) when it's printed. Apparently we've got a case of board stretch generated at the fab shop. I still have to do some mea

Solder Paste Printed Volume

Electronics Forum | Tue Dec 11 13:56:38 EST 2001 | Damian Holzmann

Regarding your comment "technology doesn't seem to have improved". Actually, technology has improved significanty. Cyber Optics uses a line measurement, a new unit from Germany uses sine wave differential measurement. The Gridmeter unit captures a vi

Water Quality Requirements to wash boards

Electronics Forum | Mon Apr 15 18:56:56 EDT 2002 | davef

Hesitating after your shout-out for �DI water rinse experts�, Q1: �What is the FIX industrial standard?� A1: Never heard of �the FIX industrial standard�. There is no standard in the US electronic industry. The issue: * Is NOT the cleanliness of


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