Electronics Forum: pass (Page 80 of 142)

Re: Solder Mask IPC Standard

Electronics Forum | Fri Oct 08 18:26:19 EDT 1999 | Dave F

Is there an IPC Standard stating the max. number of times that a PCB can pass through a reflow or wavesolder machine without having solder mask breakdown. PCB is FR4 Solder Mask is LPI Reflow and W/S Profile = Standard t

Double Sided Reflow - Components on Bottom Side

Electronics Forum | Mon Oct 04 11:28:46 EDT 1999 | Mark D.

Does anyone have a list of component types that can be put on the bottomside of a doublesided reflow board that will not fall off during the second pass (Or on the otherhand, a list of components that will fall off)? This would be a list of parts tha

Double Sided Reflow - Components on Bottom Side

Electronics Forum | Mon Oct 04 11:23:55 EDT 1999 | Mark D.

Does anyone have a list of component types that can be put on the bottomside of a doublesided reflow board that will not fall off during the second pass (Or on the otherhand, a list of components that will fall off)? This would be a list of parts tha

Re: reflowing double sided SMT

Electronics Forum | Thu Sep 23 06:01:16 EDT 1999 | joel cruz

I'm looking for some good articles on reflowing of double sided SMT boards. I'd like to come up with a process for low volume prototyping, but need to understand the do's and don'ts. Hello, you can get some insight by typing in double s

Re: reflowing double sided SMT

Electronics Forum | Thu Sep 23 06:06:20 EDT 1999 | joel cruz

I'm looking for some good articles on reflowing of double sided SMT boards. I'd like to come up with a process for low volume prototyping, but need to understand the do's and don'ts. Hello, you can get some insight by typing in double s

Re: Solder Balls on end of long pins

Electronics Forum | Wed Sep 08 17:31:58 EDT 1999 | Earl Moon

I am wave soldering a single sided through hole PCB array with (6) .040" round diameter pins that sit .5" off the PCB, and .080" apart. The problem being experienced is that solderballs are appearing on the end of the pins. I have tried decreasin

Re: BGA open

Electronics Forum | Sun Sep 05 12:59:48 EDT 1999 | Dean

Could someone shares their experience on the causes of 'Open' in the BGA after reflow. Single sided BGA assy? Or double sided BGA assy (BGA's on both sides)? I have processed double sided (MIrror assy.) bga assemblies and can tell you it is

De-wetting

Electronics Forum | Tue Aug 17 04:12:32 EDT 1999 | Scott J

Can anyone help on the subject of de-wetting during the spray coating process. We use PC29M Parts A+B spray coating material, Humiseal tapes and masking dots, Marigold supertouch V70N gloves and Concoat CM533 liquid masking material. We also use a Ko

Re: De-wetting

Electronics Forum | Tue Aug 17 13:32:13 EDT 1999 | Brian

Can anyone help on the subject of de-wetting during the spray coating process. We use PC29M Parts A+B spray coating material, Humiseal tapes and masking dots, Marigold supertouch V70N gloves and Concoat CM533 liquid masking material. We also use a

Re: solder voids, pin holes.

Electronics Forum | Mon Aug 09 16:37:14 EDT 1999 | John Thorup

Just curious what effect pinholes and solder voids can have on solder joints that have high current passing thru them. Also could moisture from steam sterilization (autoclaving) get inside a said solder joint and then outgas during high current, an


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