Electronics Forum: stencil (Page 510 of 540)

Re: Placement of 0201'

Electronics Forum | Mon Aug 03 20:07:37 EDT 1998 | Dave Kalen

Recently at the Nepcon show I saw Panasonic KME placing 0201's, must say with my olde eyes it was hard for me to even see the little buggers. Wondering if any of you are placing 0201's? what are the pros & cons, UPH, and what equipment

Re: Solder Paste Evaluation

Electronics Forum | Fri Jul 10 09:56:11 EDT 1998 | Justin Medernach

I am looking for some guidelines on evaluating solder paste. I am specifically interested in No-Clean Pastes, as they are a completely new ball game when it comes to slump, tack time, stencil life, tack time, etc. Thanks for any and all help give

Re: Solder under bottomside SMT components

Electronics Forum | Wed Jun 24 23:52:41 EDT 1998 | Phillip Hunter

Has anyone seen a problem with solder under chip components, in-between the glue and the component or in-between the mask and the component? We seen both. What could be causing this? This has only been detected on one of our products. All the re

Re: SQUEEGEE ANGLE

Electronics Forum | Wed Jun 24 00:10:07 EDT 1998 | Phillip Hunter

WHAT IS THE BEST ANGLE FOR THE SQUEEGEE BLADE TO BE ANGLED AT? WE ARE USING 45 DEGREE ON OUR POLYURETHANE BLADES, AND I BELIVE WE HAVE THE OPTION OF EITHER 45 OR 60 DEGREES ON OUR METAL BLADES. WHICH OF THE TWO IS BETTER, OR SHOULD WE BE USING AN

Madder Than Hell

Electronics Forum | Thu Jun 18 13:56:39 EDT 1998 | No Friend Of Alpha

So my salesman says to me that we could return our unneeded Al frames from our MPM printer to Alphametals in CA for credit to be applied toward a future sale. Sonded good. So I boxed up all the damn frames (44) and shipped them off to Goofyland. Now

Re: Madder Than Hell

Electronics Forum | Thu Aug 13 21:58:14 EDT 1998 | Alpha Guy

When things go wrong (see below) it can usually be attributed to a communication problem. This is exactly the issue with this case. A meeting has been held and corrections have been made with no hard feelings. However, another call rather than a

15G PQFP

Electronics Forum | Mon Jun 01 17:41:59 EDT 1998 | Jim Hoxie

First of all let me say that we are currently placing other 240 pin QFP'S with no problem. But none of them have the MASS of this beast. The part is a XILINX XC5215-6HQ240C which has a large metal heat sink covering most of the bottom of the part. T

Re: 15G PQFP

Electronics Forum | Tue Jun 02 16:02:13 EDT 1998 | Earl Moon

First of all let me say that we are currently placing other 240 pin QFP'S with no problem. But none of them have the MASS of this beast. The part is a XILINX XC5215-6HQ240C which has a large metal heat sink covering most of the bottom of the part

Re: 15G PQFP

Electronics Forum | Tue Jun 02 08:30:30 EDT 1998 | Jon Medernach

I have to agree with Steve. If the problem is progessively worse the problem is the pitch conversion that was used, and I have seen it before. It may be masked by the solder paste which could be on pitch but after reflow the paste wickes to the pad

Re: Need to spec in smt prototype equipment

Electronics Forum | Mon May 18 10:54:46 EDT 1998 | Jerry

If it's really low volume I would only invest in a stencil printer and convection reflow oven to start with. If you want to go really low budget get a manual unit such at one from Transition Automation. Make up some really good shop aids and have s


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