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Topic: Solder footprint question (Read 456 times) previous topic - next topic

jerseyguy1996

On this data sheet:

http://www.molex.com/pdm_docs/sd/473460001_sd.pdf

they show the recommended solder footprint for this part.  Is there any significance to the fact that the hashmarks on the 5 pin pads are going a different direction than the hashmarks on the 6 larger pads?
Arduino Uno;
Mega328

Osgeld

are you making a stencil so a machine can screen paste it?
http://arduino.cc/forum/index.php?action=unread;boards=2,3,4,5,67,6,7,8,9,10,11,66,12,13,15,14,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,86,87,89,1;ALL

vasquo

Nothing. It's just drafting style.

The (5) smaller lands are for the connections. The (6) larger lands are just for supports. Look at the mechanical drawings. 

(when you're pushing and pulling plugs, you don't want those (5) small lands to be the only thing holding your part on your PCB. They won't be able to take the stress. The bigger lands hold the part, i.e. welded to the PCB.)

jerseyguy1996


are you making a stencil so a machine can screen paste it?


No....just creating a new part for my Eagle library to use on my board.
Arduino Uno;
Mega328

jerseyguy1996


Nothing. It's just drafting style.

The (5) smaller lands are for the connections. The (6) larger lands are just for supports. Look at the mechanical drawings. 

(when you're pushing and pulling plugs, you don't want those (5) small lands to be the only thing holding your part on your PCB. They won't be able to take the stress. The bigger lands hold the part, i.e. welded to the PCB.)


Thanks!  That is what I thought but I wanted to be sure.
Arduino Uno;
Mega328

Osgeld

it might mean something if you were as its obviously different to attract your eye, but if your just laying out a pcb to make yourself its just style
http://arduino.cc/forum/index.php?action=unread;boards=2,3,4,5,67,6,7,8,9,10,11,66,12,13,15,14,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,86,87,89,1;ALL

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