Electronics Forum: side (Page 81 of 509)

Re: Dbl-Sided Reflow Question

Electronics Forum | Sat Jun 03 00:14:04 EDT 2000 | Ramon I Garcia C

Hi I don't speak english very well but some time I had A similar problem but the diference that we only procesed a single side, my pcb have one via hole barrel close to the pad then the solder flow throu the hole, my problem was an insuficient solder

Re: Dbl-Sided Reflow Question

Electronics Forum | Sun Jun 04 08:49:58 EDT 2000 | Roni Haviv

Hi C.K. , You can ask your PCB manufacturer to cover all vias with solder mask from CS (It called "pluged" vias). It's done from one side to prevent any close area that can cause "eraption" of solder because of pressure under reflow. All our boards

Pasting through hole connectors

Electronics Forum | Fri Apr 21 12:43:51 EDT 2000 | David

We are going to hand place through hole connectors by screening them top side in a double sided reflow board. I saw this done before sucessfully on a daily basis but is there anyone with a paper or specs as to what aperture size, any special pad cons

Re: Help Bottom Side Components

Electronics Forum | Wed Apr 12 22:26:08 EDT 2000 | Alberto Hern�ndez

Hi Kevin!!! I have worked with both sides boards in 3 differents ways: a)Glue-Solder paste- Manual assembly- Wave soldering For the bottom side we placed glue dot in the board then we placed parts and finally the convection reflow at 150�C each zone

Solder Balls

Electronics Forum | Thu Feb 01 12:50:38 EST 2001 | slthomas

I side (not that we every actually choose sides here) with the other poster re: reducing solder volume. There is a solder manufacturer that advertises regularly in trade mags. that there are "Absolutely! NONE....NIL....NADA.....mid chip beading/mic

Controlling Sodler Ball Contamination

Electronics Forum | Mon Feb 19 11:45:09 EST 2001 | sallyt

We are using a �spray� type stencil cleaner and hot DI water to clean water washable solder paste. I want to use the stencil cleaner to also clean misprinted PCBs. However, we consistently find solder balls on side A of a double-sided misprint. We

Part sliding in reflow?

Electronics Forum | Wed Apr 18 01:07:25 EDT 2001 | MW

I some something like this. My package was not flat the belly of the body rested on the PCB. We found that every 4-5 part would wander to the side. What was puzzling is that the blowers would have blown it the opposite side. ultumately we proved

Thermally Conductive Epoxy

Electronics Forum | Fri Aug 03 22:36:28 EDT 2001 | mugen

We used Thermal Pads, made of black rubbery material, and sticky on both sides (like x2 side tape), intent is to place in between, BGA/QFP and the PCB board, and reduce the air-gap flow between, the PCB to SMD... air-gap will permit air flow, that i

Double sided BGA assembly

Electronics Forum | Thu Jan 20 20:22:16 EST 2000 | Sam Guilaume

We have run some experiments on double side BGA assembly. Our preliminary results show that complete overlap of top and bottom BGA's indicate fair results, even after reliabiltiy tests (vibrations, temperature cycles, HALT). I will be interested to h

pressfit connector

Electronics Forum | Tue Jan 04 08:24:31 EST 2000 | vinceh

We are to use a special pressfit connector. Indeed, one side of the connector is overmoulded in a housing, and the other side will be pressfitted on a board. We would like to know: 1) Are such applications yet existing ? 2) What are the type of inser


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