Electronics Forum: pcb (Page 321 of 937)

PCB finish requirement for COB process

Electronics Forum | Fri Sep 27 10:05:07 EDT 2002 | oconnorp

I spec COB using wire bond attach - 0.75um � 0.25 Gold over 5um � 3 Nickle.

PCB finish requirement for COB process

Electronics Forum | Fri Sep 27 11:20:21 EDT 2002 | davef

Mar, The previous post makes the best point. Your finish spec depends on the COB process you plan to use. Is your process: * Gold wire bond * Aluminum wire bond * Flip chip * Er, watt

via in pad

Electronics Forum | Sat Oct 12 05:40:05 EDT 2002 | Kenture

Hello All, I am having issued with insufficient solder due to via in pad. It is a 10 mils via and PCB is 70 mil thick. Six mils stencils was used since there are some 20 mils (No clean process). Any recommendation? Thank you.

Reflow Oven Chain Lubrication

Electronics Forum | Mon Oct 14 03:03:34 EDT 2002 | msimkin

Mike, I have been using a fully synthetic motor oil on the links of my chains of my Hella for 7 years now, and have had no problems. As long as you do not place the oil on the fingers, where it makes contact with the PCB, then you will have no probl

Dye Pry test

Electronics Forum | Thu Oct 24 14:10:53 EDT 2002 | Terry Burnette

I've been informed that I can't post the Dye Penetrant paper on the SMTNET library till Advanced Packaging releases the paper in their Dec. issue. You should be able to pull a copy in the next couple of weeks from their site, http://ap.pennnet.com/ho

The increased component height after reflow

Electronics Forum | Thu Oct 24 03:03:13 EDT 2002 | harriss

Hi: The component height will increase on the PCB after reflow soldering. But i don't know the accurate data of the increased height. Who can help me to get it? The stencil thickness is 5 mil we used. Thanks Harriss

conductive fill via

Electronics Forum | Mon Nov 11 02:28:27 EST 2002 | Melvin

I want to make a double-sided PCB. the process include conductive filling via for RF guarding. Does anyone can tell me where I can do it?

PCB Pad lifted - repair

Electronics Forum | Thu Nov 14 08:28:11 EST 2002 | dphilbrick

Rogers is a PWB materials manufacturer based in CT. they make a lot of unique materials for PWB fab such as a 1 time bendable PWB.

PCB Pad lifted - repair

Electronics Forum | Thu Nov 14 08:30:34 EST 2002 | dphilbrick

Vinny I would call Rogers. Depending on what materail of theirs you are using it may require special processing. I would also send them one of your boards with defects they could probably tell you how to stop that from happening.

Reflective coating on PCB

Electronics Forum | Thu Nov 14 12:46:51 EST 2002 | dphilbrick

Most people I have seen use white coat mask. This works very well in LED signs and such. Doug


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