Electronics Forum: multilayer stack up (Page 1 of 17)

Stack up Analysis

Electronics Forum | Thu Aug 05 11:40:24 EDT 2004 | Dhanish

How do you perform stackup analysis for mechanical parts?I refer to some documents and it is very detail.

Stack up Analysis

Electronics Forum | Thu Aug 05 17:21:48 EDT 2004 | russ

A stackup is basically this, if all parts (mating) are at the high end or low end of tolerances will they still fit together or meet any dimensional requirements as an assembly.

Making a BGA stand up

Electronics Forum | Mon Jan 13 21:52:16 EST 2003 | davef

Haaaaaa!!!! You contractors get all the fun don't ya??? Consider: * Replacing the balls on the corners of the devices with balls composed of a "hard solder", yano something like 90/10. * Shimming to prevent excessive collapse of a heavy BGA during

Multilayer PCB X-ray inspection

Electronics Forum | Mon Apr 05 17:47:21 EDT 2010 | boardhouse

Hi Deni, X-ray will not be able to see through Power and Grn planes. Your only way to find out is: 1) ask your board supplier to supply stack up used. 2) surface grind layer by layer to validate if it is correct stack up. What is making you think

Multilayer PCB X-ray inspection

Electronics Forum | Tue Apr 06 14:45:52 EDT 2010 | stepheniii

You would be suprised what you can see with even a simple Xray machine. The engineers upstairs wanted to see if the xray could confirm there was an open via on a thin dense board with several layers. I thought (but didn't say) no way. But with carefu

Multilayer Ceramic Capacitor (MLCC) failure root cause analysis

Electronics Forum | Wed Aug 22 13:18:50 EDT 2012 | rway

I also forgot to mention that the pizza-slicers you are using can get out of spec and may need periodic calibration. By cutting too close, these can over-stress your pcbs as well. Do you only see this problem at one cutter or does it matter? Also,

Copper Finishes versus Layer Thickness

Electronics Forum | Tue Jan 02 14:15:59 EST 2007 | realchunks

I have a new customer that has a print calling for 2oz. copper finish for top and bottom layers, and 1oz. copper finish for the inner 6 layers. Now, they also have a stack up depicting each layer and thickness. It shows the outer layers of copper b

Multilayer PCB X-ray inspection

Electronics Forum | Thu Apr 15 10:44:28 EDT 2010 | dwonch

Dumb question maybe but does the board have a layer count window? Usually each layer has it's number visible in copper somewhere on the board and the shop will leave the solder mask clear of this window. If the layers were stacked incorrectly it woul

Re: T sub g

Electronics Forum | Thu Jun 25 14:41:07 EDT 1998 | Earl Moon

| Alright gentlemen and ladies of the forum, I again seek knowlage on what is probably a well known fact. I have spent a good part of the morning with various IPC standards and weighty tomes such as the Electronic Packaging and Interconnection Handb

Researching stencil cleaners

Electronics Forum | Thu Mar 29 11:11:49 EST 2001 | pzohbon

Rob, How does your chemistry stack up against the 440R? I see you mentioned ease of maintenance as one down fall in that chemistry's make-up. Could you elaborate for me. Thanks.

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