Electronics Forum: after (Page 366 of 656)

PCB over shelf life

Electronics Forum | Thu Dec 16 04:14:16 EST 2010 | kemasta

Hi, I am new in this industrial. I learnt that PCB may absorb moisture and eventually caused delaminate after heat apply on it (reflow or wave). But I don't quite understand, if the PCB was keep in sealed bubble bag, and with the humidity control wit

be careful a cheat company-Sydeco Srl(Biagi Luigi)

Electronics Forum | Wed Feb 09 06:46:53 EST 2011 | exsydeco

I support this information. I was cheated by this guy too, but i was lucky, i stopped working with him after he dragged my payment for 2.5months and still owes me the promised salary. Here is the link to the thread i created last time. http://www.s

1B31 Acrylic conformal coating problems

Electronics Forum | Sun Dec 26 23:48:01 EST 2010 | raghu

Dear Sir, We are using 1B31 conformal caoting of 48 sec viscosity in Zahn #1 cup, by machine(PVA354) application with Tank air pressure 2.3 psi, automising air pressure 1 psi. 7 days after application we are observing peeling off problem.. And n

what product will use the SMT electrolytic capacitor ?

Electronics Forum | Tue Jan 25 22:18:56 EST 2011 | pluspark

thanks for your time to reply me . i will learn more about such professiional knowledge about electronics , .. hehe, i'm a newcome saler of pluspark electronics technology co.,ltd .i didn't make the business of the capacitor before, and i want t

what product will use the SMT electrolytic capacitor ?

Electronics Forum | Tue Jan 25 22:20:55 EST 2011 | pluspark

thanks for your time to reply me . i will learn more about such professiional knowledge about electronics , .. hehe, i'm a newcome saler of pluspark electronics technology co.,ltd .i didn't make the business of the capacitor before, and i want t

Soder Paste Shelf life extension

Electronics Forum | Fri Feb 18 11:24:52 EST 2011 | pkannan

The following is my opinion on the Shelf life of the Solder paste. Comments are welcome to support or against it. Solder Paste users often have the issue of Shelf life expiry condition. Companies including big MNCs, order certain quantities, but du

Soder Paste Shelf life extension

Electronics Forum | Sat Feb 19 10:27:38 EST 2011 | kahrpr

Just a thought. What is the real shelf life of the past? Do manufactures low ball the self life to sell more paste. If the past is perfectly good one day before the expiration date is it still bad one day after I doubt it. Right or wrong I have seen

BGA solder bridge - Adding Pictures

Electronics Forum | Fri Mar 04 01:08:19 EST 2011 | kemasta

Thanks davef Bridging:- There is no heat sink on the BGA, the heat sink will be fix after relow. I do believe paste had something to do with it, but currently this defect didn't appear so oftenly, so we think that the main root cause is not from the

NEED HELP -Conceptronics oven HVC102 SERIES-trouble shooting

Electronics Forum | Tue Mar 01 23:55:41 EST 2011 | cmguan79

Hi all, Need help troubleshooting for I've just bought a 1997 second-hand oven HVC102. Unfortunately, after loading profile & press run mode we found all TC READING IS ZERO & CONVEYOR READING FEEDBACK IS ZERO SHOWN ON MONITOR SCREEN ,& I LOSS PA

Tin Plated Components

Electronics Forum | Fri Mar 18 14:22:37 EDT 2011 | bradbriggs

We recently ran into a situation where a SMT header with tin plated tails would not wet properly during reflow. Someone told us that tin plating has a shelf life and needs to be re-tinned after a length of time. I have not heard of that before. Do


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