Electronics Forum | Tue Apr 27 13:00:05 EDT 1999 | Justin Medernach
| What is the current spec for sizing PCB pads for a land grid array? How about for a ball grid array? Are there industry spec's I can reference? | | Thanks, | | Frank | Frank, Refer to the device manufacturers. they are going to have a recomme
Electronics Forum | Thu Oct 24 09:22:32 EDT 2002 | dscott
We are a supplier building prototypes. Most of our projects consist of boards with array packages down to 30 mil pitch. My concern is with customers that return boards for rework on array packages. Typically if their product is not functioning that i
Electronics Forum | Thu Feb 12 21:06:20 EST 2004 | davef
"LGA" [land grid array] is a pretty broad topic. Search the fine SMTnet Archives for background on: * BGA * uBGA * Flip chip * etc Consider: * Area Array Packaging Handbook: Manufacturing and Assembly; Ken Gilleo; McGraw-Hill Professional; 1st edit
Electronics Forum | Wed Jun 06 09:29:33 EDT 2007 | SWAG
An example would be great, Hussman. Please send to sketest@skecorp.com if you have the time. We have something like it but maybe yours has things we didn't think of. I agree with doing our own array designs - that would be great but we are low on
Electronics Forum | Thu Jun 04 20:06:30 EDT 2009 | davef
Since posting the above comment extolling the virtues of NSMD pads and disparaging SMD pads, we've learned that the points apply to all array devices, but in spite of that some designers of fine pitch [eg, 0.4, 0.5mm pitch] array devices choose SMD w
Electronics Forum | Tue Dec 23 07:49:10 EST 2014 | robertwillis
the most common reason can be popcorning of the device or warpage of the packages during reflow. the distacnce from the boatom of the device is decreased hence the solder shorts. Trying doing some measurements on the package during simulated reflow.
Electronics Forum | Mon Jun 22 06:35:19 EDT 2020 | vinitverma
Sapphire has a Line Array camera on either side. So all components on all nozzles are recognised in a single pass. But Sapphires are tough to maintain. And yes, it can handle max. 25x25mm components with the Line Array.
Electronics Forum | Fri Apr 30 12:06:54 EDT 2021 | proceng1
I have a small board in a 5x5 array. Thickness is .014". The fist build, the array was all routed with mouse-bites. Customer doesn't like the edge left by the mouse-bites. Board house says they can't v-score a board that thin. I'm not sure what o
Electronics Forum | Mon Jul 25 19:12:17 EDT 2022 | proceng1
I generally do not design an array larger than 10" x 12". Other than just thermal mass, the one issue to watch with extra length is if the array is so large that it spans multiple heat zones at the same time. We have panels that are up to 48" l
Electronics Forum | Fri Apr 20 11:07:52 EDT 2001 | kawiederhold
Hi Dave, Good to "talk" to ya again!! I have attached a photo of the antenna. Hopefully it will work its way through the system. The pictured antenna meets all our criteria. The defective antennae all seem to slide toward the center of the PCB (
