Electronics Forum: have (Page 2001 of 3472)

Wave Solder Machine Fingers

Electronics Forum | Fri Jan 25 17:33:52 EST 2002 | barryg

I do not know what this plating is, I would check your service manual, or contact the machine manufacturer, our wave machines use titanium fingers, which i believe are not plated. If yours are plated you should be able to contact the manufacture, and

Baking time for PCBA rework

Electronics Forum | Wed Feb 06 19:28:43 EST 2002 | sleech

I agree with Francois. We have just announced a 55 deg. C LTVP drying process that can greatly speed moisture removal. It is also effective for drying components that remain in tape and reel, conductive plastic shipping tubes or trays. Process time

Call for articles

Electronics Forum | Thu Jan 31 14:06:37 EST 2002 | bdoyle

Would you like to have your articles published in the SMTnet Express? We're looking for any articles that pertain to the industry. Talk about current industry events, new technologies, or new issues. Check out our submission guidelines: http://ww

Residual BGA Stress

Electronics Forum | Tue Feb 05 09:19:27 EST 2002 | Carol Stirling

Would someone be able to direct me to information on residual BGA stress please? I've been told that mounting the BGA involves residual stress to the solder balls due to different expansion characteristics of the BGA versus the board at the moment of

Residual BGA Stress

Electronics Forum | Tue Feb 05 22:19:52 EST 2002 | davef

Residual stress is not limited to BGA balls. I have residual stress. It does not leave until I start singing Led Zepplin songs at the top of my lungs. And for that to start, I need a good hour of staring at the bottom of a frosty mug at Jimbo's Lo

Moisture Sensitive Device over baked

Electronics Forum | Fri Feb 15 02:49:35 EST 2002 | nifhail

What are the consequences of having the Moisture sensitive component to be overbaked. Say if the specs. calls for 125 C +/- 5 C for 48 hours, but they components were accidently left in the oven during a weekend, wih the oven still operating, to make

Middle Height Splice

Electronics Forum | Tue Feb 19 11:34:04 EST 2002 | AndyC

Do you mean middle height slice ? . This is a term used to describe the x-ray taken at a mid-ball position on a BGA ball , ie , the "fattest/widest" part if the ball . This is generally done to see if voids contained within have led to fracture acros

PICMG Chassis Specification?

Electronics Forum | Tue Feb 19 18:35:05 EST 2002 | dougt

I was asked by a mechanical guy where the industry standard was for designing a chassis for an ISA/PCI backplane board that we are going to use. We typically use a chassis built by an outside manufacturer but they have decided to build our own. Wel

When do you use Tin/Lead/Silver paste ?

Electronics Forum | Wed Feb 20 10:28:38 EST 2002 | jax

Silver in paste is usually employed to prevent scavenging of silver from silver plated surfaces, BUT Dave's right. I wouldn't think Components are uniform enough to base a process change on. See how it goes with what you have. You will probably find

lead free solder crack

Electronics Forum | Fri Feb 22 15:16:24 EST 2002 | rkevin

Bet your using tin/ lead plated components with a lead free Cu/Ag/Sn alloy. It leads to intermetallic cracking. Wow didn't anyone tell you to check the archives yet, It seems to be the answer given to everyone. Why have an interactive site if you alw


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