Electronics Forum: bga pad size (Page 2 of 208)

BGA pad size too large??

Electronics Forum | Wed Sep 07 00:28:04 EDT 2011 | woodsmt

I have identified a Board design issue and having trouble convincing others of my findings. I have a BGA (Sn63 balls, +1500 IO, 0.6mm ball, 1mm pitch, with heat spreader plate)that has a high incidence of solder shorting on the corners. The board i

stencil thickness for bga

Electronics Forum | Mon Oct 13 19:04:47 EDT 2003 | davef

Aperture size should vary with the component [pitch]. That size should be the same a the pad size. So, generally pinching is not required. Indium discusses BGA apertures on their site [ http://www.indium.com ]

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

BGA PCB Pad size

Electronics Forum | Sun Jan 26 21:09:32 EST 2003 | Grant Petty

Hi, Ok, thanks for the info, and I had not considered that factor. Is this an issue related to the reflow temperature change in the oven, or a temperature change in normal product use issue? I will check out the standard, and do you know where it's

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

BGA PCB Pad size

Electronics Forum | Sun Jan 19 10:25:54 EST 2003 | davef

You shouldn't freak. You want the pads on both sides of the BGA ball the same so that the torgue from changes in dimension due to different CTE [ie, interposer, solder, bare board, etc.] is balanced on the top and the bottom of the ball. So, the ma

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

BGA PCB Pad size

Electronics Forum | Fri Jan 17 15:36:23 EST 2003 | davef

How do 0.5 mm pads on the board help paste release from the stencil? Paste release from the stencil is a function of: * Paste * Printer operation * Stencil design You have no obligation to made your stencil apertures the same size as the pads on yo

BGA PCB Pad size

Electronics Forum | Fri Jan 17 21:17:18 EST 2003 | Grant Petty

Hi, Our paste release problems have been solved, and we worked on the stencil, and things are working well now. However this board was designed before we knew what was going on, and we thought a little more size on the pads would be a big help. Is

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.


bga pad size searches for Companies, Equipment, Machines, Suppliers & Information

pressure curing ovens

Have you found a solution to REDUCE DISPENSE REWORK? Your answer is here.
PCB Handling with CE

High Resolution Fast Speed Industrial Cameras.
Fully Automatic BGA Rework Station

500+ original new CF081CR CN081CR FEEDER in stock