Electronics Forum: stencil (Page 509 of 540)

Re: Pretty dirty pictures

Electronics Forum | Mon Sep 28 11:34:26 EDT 1998 | Steve Gregory

Does anyone out there have any pictures (jpeg preferred) of solder paste prints - or know where some are available. It will be awhile before our 35mm camera for our 3D scope arrives and I need some for inspection criteria. I need the good, bad, and

Re: Pretty dirty pictures

Electronics Forum | Mon Sep 28 13:16:58 EDT 1998 | Earl Moon

Does anyone out there have any pictures (jpeg preferred) of solder paste prints - or know where some are available. It will be awhile before our 35mm camera for our 3D scope arrives and I need some for inspection criteria. I need the good, bad

Re: BGA Shorting problem

Electronics Forum | Tue Sep 01 19:31:36 EDT 1998 | Kallol Chakraborty

We are experiencing shorting on a BGA. The part has a 1mm pitch with a 196 I/O count. The problem seems to pop up without warning & disappear in the same manner. Our pad design is .020" diameter pads with .025" solder resist diameter. The ce

Re: Used Equip. Experience

Electronics Forum | Mon Aug 24 15:23:47 EDT 1998 | Dana Wentworth

I am interested in hearing about people's experiences with buying used pick and place and stencil printing equipment. For example, was the cost saving worth the experience, was technical support available before and after the sale, did you deal dir

Re: Used Equip. Experience

Electronics Forum | Thu Aug 20 09:38:02 EDT 1998 | JUSTIN MEDERNACH

I am interested in hearing about people's experiences with buying used pick and place and stencil printing equipment. For example, was the cost saving worth the experience, was technical support available before and after the sale, did you deal dir

Re: Used Equip. Experience

Electronics Forum | Thu Aug 13 12:15:08 EDT 1998 | Mike Cox

I am interested in hearing about people's experiences with buying used pick and place and stencil printing equipment. For example, was the cost saving worth the experience, was technical support available before and after the sale, did you deal dir

Re: Printing and Reflow with Ceramics

Electronics Forum | Thu Aug 13 07:53:40 EDT 1998 | Earl Moon

Couple of questions. 1) Are we talking alumina substrates as the ceramic material? 2) Are we co-firing gold as the conductors on the substrate surface? 3) In other words, is this a hybrid thick film circuit? 4) If so, how large or

Re: Solder Balls

Electronics Forum | Fri Aug 21 13:43:13 EDT 1998 | Ben Salisbury

Hello everyone, I am currently running a gold plated SMT board and am experiencing tiny solder balls between the pads and the masking between the 20 mil pitch devices. I'm looking at these boards with a 60x microscope. IPC-610 say's any visible s

Re: BGA reflow profile

Electronics Forum | Tue Jul 28 02:13:57 EDT 1998 | Bob Willis

There is a procedure for profiling on my web site that may be of use to start with www.bobwillis.co.uk We are about to run our first BGA devices and would appreciate some confirmation on a few points. First some details: PCB & Device: ======

Re: Placement of 0201'

Electronics Forum | Tue Jul 21 10:36:31 EDT 1998 | Justin Medernach

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 you


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