Electronics Forum: pass (Page 80 of 142)

Re: Insufficient solder joint

Electronics Forum | Tue Dec 14 11:13:43 EST 1999 | Chris May

Paul, I have (as many have) come across this problem due to misregistration of resist at the PCB fab. You didn't say if these boards are inexpensive double sided or costly multis. I know this shouldn't make a difference on quality but I would tend t

Re: Moonman - may I join you?

Electronics Forum | Thu Nov 04 17:33:24 EST 1999 | John Thorup

Yes, the Moon has set. Final signoff was 10.1.99 and several threads appearing in the previous 10 days or so sort of say why. List by author to check. I was out for most of this period and missed it as well. I went looking after Brian's post. I

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


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