Electronics Forum: having (Page 166 of 3489)

Voiding under BGA's

Electronics Forum | Sun May 08 07:09:04 EDT 2005 | Rick Iodice

We are continuing to struggle with voids under BGA's. Our problem are not consistent. some CCA's are perfect but others have pin hole sized voids. Does anyone have any feedback on Indium 92j and how it performs for bga's?

TH Crystals

Electronics Forum | Tue May 10 09:14:31 EDT 2005 | russ

Are you running a water soluble process? There may have been an instance where a certain Xtal could not be washed. We have always waved Xtals like Dave without fear.

Peelable Masking

Electronics Forum | Tue May 10 16:53:21 EDT 2005 | jdengler

For dots this size I have applied a thin coat of Chemtronics CM8, let set 10 mins then waved. The preheaters finished the cure before the board reached the wave. You just have to drill into the heads of who applies the mask that thinner is better!

SCREEN PRINTER PROBLEM

Electronics Forum | Wed May 18 21:12:18 EDT 2005 | ??

hmmmmm..... dek doesnt have the tech support to fix a problem on a printer they have sold......hmmmmmm........reckin i will be staying away from their printers......

Maximum PCB width

Electronics Forum | Mon May 23 11:51:07 EDT 2005 | Rob

Depends on how many nozzles you will need for the larger board - if its 8 or less (4 per head) then you can take it out. You shouldn't have too many problems with this as with your setup you have one for small stuff & one for big stuff.

A.O.I recommendation

Electronics Forum | Tue May 24 04:42:21 EDT 2005 | RB

We do have experience whit the Mirtec. We have a Viscome and a Mirtec. We are very satisfied over the Mirtec.

A.O.I recommendation

Electronics Forum | Thu Jun 23 09:07:39 EDT 2005 | CMiller

I have owned an Agilent SJ-10 and currently a YesTech machine. I dont know about any other manufacturers but I can tell you Agilents support left a lot to be desired. I dont know if it is the people or the company but I have major issues with the w

Dross produced, are we in or out?

Electronics Forum | Tue May 24 14:07:33 EDT 2005 | russ

I agree, but OSHA is starting to get curious about the high turnover rate we are having and are curious why there has been no complaints. And I just can't tell them that I am killing the operators off before they have a chance to complain.

What is thermal mass?

Electronics Forum | Mon May 23 08:22:31 EDT 2005 | davef

Thermal mass is the ability of a material to absorb heat energy. * A lot of heat energy is required to change the temperature of high density areas, like a ground plane. They are therefore said to have high thermal mass. * Light weight areas, such as

Supplier needed?

Electronics Forum | Tue May 24 11:07:07 EDT 2005 | pr

Check "WP Sales" or "SMT Research", I know they have Fuji replacement parts like nozzles etc. I suspect they have feeder parts as well. good luck, pr


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