++ ATOT official NEF thread part IV ++

[rudeguy]

it looks like the pins are .17mm-.27mm with a .2mm pitch. In my brain that means if I got with a .2mm ball, it could either be a little small or a little big. I'm assuming you want the ball to be a little big to ensure good contact. But not to big as to overlap onto other pads.

 

[sdifox]

it looks like the pins are .17mm-.27mm with a .2mm pitch. In my brain that means if I got with a .2mm ball, it could either be a little small or a little big. I'm assuming you want the ball to be a little big to ensure good contact. But not to big as to overlap onto other pads.

did you see the not meant for hand soldering?

 

[rudeguy]

check that

.5mm pitch. That's awesome. That means a .25mm ball would be perfect.


I think.

 

[rudeguy]

did you see the not meant for hand soldering?

I don't believe in reading instructions. Sometimes they tell me I can't do things that I really can.

 

[sdifox]

I don't believe in reading instructions. Sometimes they tell me I can't do things that I really can.

lulz

 

[mnewsham]

I'll give someone $5 if they can tell me what size balls a CY62157EV30LL-45BVXI has

Could be wrong but on a 6x8mm package(I think that one is 6x8mm) it should be 0.75mm ball pitch.

 

[rudeguy]

We ordered one of these bad boys with all the goodies:
http://www.smttools.com/bga100.html

I already have an IR/Hot Air Rework station. So right now we are waiting for the scope, thermocoupler (fancy one that displays on the PC) and the reballing kit to come in.

Its not exactly hand soldering. But its for sure not a professional BGA rework station. But if I prove my concept and am able to replace and upgrade memory chips on the terminals we use, a real rework station might happen. I'm hoping we find that the equipment I already have works well enough so I can get them to buy me an ultrabook with the money I saved them.

Oh..and if the memory upgrade goes well, the owner can do a project he has been drooling over for a while but wasn't able to do.

 

[rudeguy]

Could be wrong but on a 6x8mm package(I think that one is 6x8mm) it should be 0.75mm ball pitch.

how did you figure that?

Please please please tell me. Figuring ball size has been the one thing I haven't been able to do!

 

[mnewsham]

how did you figure that?

Please please please tell me. Figuring ball size has been the one thing I haven't been able to do!

I'm just going off typical VFBGA ball pitch for that size package, could be off tho.

http://www.siliconfareast.com/vfbga.htm

 

[rudeguy]

I'm just going off typical VFBGA ball pitch for that size package, could be off tho.

http://www.siliconfareast.com/vfbga.htm

awesome

Now how do I figure ball size?

 

[sdifox]

awesome

Now how do I figure ball size?

laser caliper :biggrin:

 

[sdifox]

kama ikada

 

[rudeguy]

or does ball pitch = ball size?

I thought pitch was distance between the pins?

 

[mnewsham]

awesome

Now how do I figure ball size?

How should I know, I'm a petco cashier.

 

[SaDiZTiKStyLeZ]

http://gametz.com/user/SaDiZTiKStyLeZ.html

 

[sdifox]

narf

 

[rudeguy]

How should I know, I'm a petco cashier.

but....

didn't you stay at a Holiday Inn Express last night?

 

[sdifox]

kunai

 

[mnewsham]

but....

didn't you stay at a Holiday Inn Express last night?

:sneaky:

 

[sdifox]

but....

didn't you stay at a Holiday Inn Express last night?

You were with him didn't you? D:

 

[MontyAC]

 

[MontyAC]

 

[MontyAC]

 

[rudeguy]

:sneaky:

but seriously....can you help me with this?

Its the last piece of the puzzle!

 

[sdifox]

ni