Electronics Forum: eng (Page 4 of 33)

TOMBSTONE DEFECTS

Electronics Forum | Sun Mar 16 20:46:18 EST 2003 | MA/NY DDave

Hi Good, that is one of the things I see some have done. With paste too thick these little components float too much off, rather than centering. YiEng, MA/NY DDave

TOMBSTONE DEFECTS

Electronics Forum | Thu Mar 20 14:01:34 EST 2003 | MA/NY DDave

Hi I understand that more circular or rounded pads also reduce the effect. I love it when many independent variables can alter the outcome. YiEng, MA/NY DDave

TOMBSTONE DEFECTS

Electronics Forum | Thu Mar 20 14:05:17 EST 2003 | MA/NY DDave

Hi Rene Great, I am glad to see that you are recommending by experience placement control as affected by the pick operation. Neat to see you are also noting a thinner paste deposition. YiEng, MA/NY DDave

oven profile

Electronics Forum | Thu Mar 27 23:31:18 EST 2003 | MA/NY DDave

Hi I hope I am replying in the correct tread down link. J.Fox is right. Know the Assembly / PWA that you are processing. YiEng, MA/NY DDave

PCB ESD protection

Electronics Forum | Sat Mar 22 12:18:39 EST 2003 | MA/NY DDave

Hi, As I read and reread, I don't understand your question. Is it a design protection for in use?? Is it packaging while shipping protection?? What is the signifance of the 3Volts?? YiEng, MA/NY DDave

Touch up paint for Universal GSM

Electronics Forum | Thu Mar 20 13:57:39 EST 2003 | MA/NY DDave

Hi Hopefully one or maybe two of the UNIVERSAL people on this list will give you your information. I am not sure I would use the paint you have selected. YiEng, MA/NY DDave

Shelf life of PCBs

Electronics Forum | Tue Mar 25 11:38:58 EST 2003 | MA/NY DDave

Hi O'Conner, You are more than welcome. If you found anything really great in the Archives Please give the info so that I can also read and continuously learn. YiEng, MA/NY DDave

BGA Picture Evaluation

Electronics Forum | Wed Apr 09 22:26:23 EDT 2003 | MA/NY DDave

Hi, "Dave is there an easy way to calculate liquidous temp?" Just one comment for now. The supplier should know this temp or it's range. They do it with the bulk material. YiEng, MA/NY DDave

mirae pick and place machine

Electronics Forum | Sat Apr 12 00:48:35 EDT 2003 | MA/NY DDave

Hi I want to echo the above good advice. Be careful that you either buy a machine from a company that will be here 5 years out or you buy training, equipment documentation and spare parts to cover you. YiEng, MA/NY DDave

Gerber Data Extraction

Electronics Forum | Wed Nov 03 17:27:55 EST 2004 | vinod

I would also like to get some info on that gerber data extraction tool from "SMT Eng 1001". I been using CircuitCam.


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