How to use solder ball instead of solder paste? - GSM-Forum

kennyli · 03-08-2004, 18:18

Dear friend,

I have no problem with using solder paste! May be I am not that expert, so I always end-up with a mess and need to redo 2-3 times to complete a BGA job!

I am trying to use solder ball to reduce the mess, but I just realize that I have no idea how to position all the solder balls on the UEM before I apply hot air to it!

My question is, how to poistion the tiny solder balls on the UEM before I apply hot-air?

Thanks

Kenny

maddox · 03-08-2004, 21:34

You have to use a mask also to place the balls un the bga.

Or jus look here -> How to reball the text is in german, but I think the pictures speak more then words.

kennyli · 03-08-2004, 21:45

Quote:

Originally Posted by maddox

You have to use a mask also to place the balls un the bga.

Or jus look here -> How to reball the text is in german, but I think the pictures speak more then words.

My friend,

Thank you for your informartion. This is very much useful

One small question. In the picture (left-hand side, 3rd one counting from the top), it said "Oxidize". What does it means?

Thanks again.

Kenny

maddox · 03-09-2004, 00:11

It means that there is some oxydation (black Pad) on the BGA.
Some old oxydated solder.

kennyli · 03-09-2004, 07:01

Quote:

Originally Posted by maddox

It means that there is some oxydation (black Pad) on the BGA.
Some old oxydated solder.

Thank you!

This is the best information I can find so far !

Very much useful!

Thanks again

Kenny

maddox · 03-09-2004, 19:16

Nothing to thank for.
i try to help if I can.

kennyli · 03-09-2004, 19:42

Quote:

Originally Posted by maddox

Nothing to thank for.
i try to help if I can.

You are a good man

Scaramouche · 03-10-2004, 02:10

Does anybody actually know the brand and availabilty of the reballing kit show in those photos?

I use the chinese kit with the balls, but the quality is very poor compared to looks of this one. Iam talking about the actual loading tray, a lot of balls are wasted. here it looks like you can pick up excess balls.

When using balls, very important to use honey tacky flux because hot air will **** them off the BGA and liquid flux will bubble too much and they will move off pads.

maddox · 03-10-2004, 10:04

Quote:

Originally Posted by Scaramouche

Does anybody actually know the brand and availabilty of the reballing kit show in those photos?

This is a very good question . . .

here is the original from where I got the pictures.

http://www.bandshine.com.cn/trouble.htm

abhinaymobiles · 04-04-2004, 12:00

where can i get the BGA balls

[Rod] · 04-04-2004, 21:36

contact me

03-08-2004, 18:18	#1 (permalink)
kennyli No Life Poster Join Date: Dec 2002 Location: Asia Posts: 892 Member: 19208 Status: Offline Thanks Meter: 2	How to use solder ball instead of solder paste? Dear friend, I have no problem with using solder paste! May be I am not that expert, so I always end-up with a mess and need to redo 2-3 times to complete a BGA job! I am trying to use solder ball to reduce the mess, but I just realize that I have no idea how to position all the solder balls on the UEM before I apply hot air to it! My question is, how to poistion the tiny solder balls on the UEM before I apply hot-air? Thanks Kenny

04-04-2004, 12:00	#10 (permalink)
abhinaymobiles Junior Member Join Date: Feb 2004 Age: 52 Posts: 26 Member: 56195 Status: Offline Thanks Meter: 0	bgaballs where can i get the BGA balls

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03-08-2004, 21:34	#2 (permalink)
maddox Junior Member Join Date: Jan 2004 Location: HESSEN Age: 49 Posts: 11 Member: 51014 Status: Offline Thanks Meter: 0	You have to use a mask also to place the balls un the bga. Or jus look here -> How to reball the text is in german, but I think the pictures speak more then words.

03-09-2004, 00:11	#4 (permalink)
maddox Junior Member Join Date: Jan 2004 Location: HESSEN Age: 49 Posts: 11 Member: 51014 Status: Offline Thanks Meter: 0	It means that there is some oxydation (black Pad) on the BGA. Some old oxydated solder.

03-09-2004, 19:16	#6 (permalink)
maddox Junior Member Join Date: Jan 2004 Location: HESSEN Age: 49 Posts: 11 Member: 51014 Status: Offline Thanks Meter: 0	Nothing to thank for. i try to help if I can.

03-10-2004, 02:10	#8 (permalink)
Scaramouche Freak Poster Join Date: May 2002 Location: Perth, Western Australia Age: 45 Posts: 313 Member: 11937 Status: Offline Thanks Meter: 1	Does anybody actually know the brand and availabilty of the reballing kit show in those photos? I use the chinese kit with the balls, but the quality is very poor compared to looks of this one. Iam talking about the actual loading tray, a lot of balls are wasted. here it looks like you can pick up excess balls. When using balls, very important to use honey tacky flux because hot air will **** them off the BGA and liquid flux will bubble too much and they will move off pads.

04-04-2004, 21:36	#11 (permalink)
[Rod] No Life Poster Join Date: Jun 2003 Location: somewhere Age: 40 Posts: 2,318 Member: 31028 Status: Offline Thanks Meter: 56	contact me