Electronics Forum: pcb size ipc (Page 1 of 147)

BGA PCB Pad size

Electronics Forum | Mon Jan 27 09:43:15 EST 2003 | davef

Sorry. I mistyped information on the guidelines. It should be: SM-785 - Guidelines For Accelerated Reliability Testing Of SM Solder Attachments Order SM-785 from: IPC 2215 Sanders Rd Northbrook, IL 60062-6135 847-509-9700 When you are ordering t

Land size

Electronics Forum | Thu Jul 10 07:48:40 EDT 2008 | realchunks

Try IPC SM 782. Also most parts manufacturers should be able to provide you a pad design.

Land size

Electronics Forum | Mon Jul 07 13:33:40 EDT 2008 | realchunks

Most QFP 128s have a 0.16mm wide lead. Might have to modify your pads if you'r buying some odd ball part. But generally 0.2mm should be OK for this part. You may never get good toe wetting. Most QFPs are cut apart after plating, thus the toes are

glue size

Electronics Forum | Wed Dec 27 23:04:10 EST 2006 | i want to learn from u

Most of pcb have white/black printing at bottom side of them to indicate the chip location. Normally, this printing are the same location to the place that glue will be mount. My problem are the glue size between the point that have printing and not

Re: pads size

Electronics Forum | Tue Apr 06 16:09:25 EDT 1999 | Dave F

| Hi, | Somebody know how to calculate the size of pads for different IC's: QFP's, SOIC, SOJ, etc. | | any help is apreciated. | | thanks | | AC | Al: Justin's comments are well taken. Who should know better about pad sizes that the component m

BGA pad size

Electronics Forum | Tue Jun 14 18:26:32 EDT 2005 | GS

You can find useful informations also on last review of IPC-7085 : Design and Assembly Process Implementation for BGA. Regards GS

BGA PCB Pad size

Electronics Forum | Fri Jan 17 09:38:20 EST 2003 | Grant Petty

Hi, We have a BGA that uses .4mm diameter PCB pads on the BGA itself, however we have decided to use .5mm pads on the PCB, to help paste release from the stencil. Is this a bad thing, having different size pads on the PCB compared to the BGA itself

Samsung Fiducial size question

Electronics Forum | Thu Jun 03 06:14:38 EDT 2021 | bukas

Yes, most of my fiducials are 1 mm. BUT, you may consider going 1.5mm or even better 2 mm because in my experience PCB manufacturers will NOT check fiducial shape during PCB testing. This goes for fiducials that are placed on panel frame. Fiducilas t

BGA PCB Pad size

Electronics Forum | Thu Jan 30 06:44:20 EST 2003 | Grant Petty

Hi, Great, thanks for the info! Regards, Grant Petty Blackmagic Design www.blackmagic-design.com

APerture size for microBGA

Electronics Forum | Thu Jun 29 09:12:27 EDT 2000 | sree

What is the best aperture opening for micrBGA with 0.8 mm ball pitch and 16 mils ball diameter?The pad size on the PCB is 12 mils.

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