Bga reballing problem - GSM-Forum

shani1122 · 05-06-2017, 21:22

I m having **** problem while reballing chips. Problem is when ever i reball ic it gets stuck in stencile plate. N if i try to remove it then all balls gets destroy. I m really annoyed with this problem . I m using reballing paste for reballing. Anyone can suggest me what should i do?

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orx · 05-07-2017, 08:37

Hi

1- clean well the stencil with isopropilic / propanol (important ! )
2- put the solder past on stencil On a flat surface
3- Bring in the temperature with your hot air and before removing the ICs over a bit of good flux (imortant! )
4-for removing reballed ic use hot air a max speed .

use good reballing paste ...i use Kester paste very good but expensive.

fulviospano · 05-08-2017, 20:14

Hold the balls directly on the pitches of the ic

shani1122 · 05-08-2017, 23:11

Quote:

Originally Posted by fulviospano

Hold the balls directly on the pitches of the ic

You mean premade balls?

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orx · 05-10-2017, 16:20

intends balls already ready to be positioned on Ic .. but this you can try on " big" ic as nand, on small ic for me a waste of time ..for mobile is convenient to use stencil Or you can use if you're very skills at pyramid technique with solder iron ..ceck you tube for this.

balls already ready is used for reballing m.board laptop / notebook

Platijet · 05-10-2017, 19:11

Quote:

Originally Posted by orx

Hi
i use Kester paste very good but expensive.

Any trustable reseller?

orx · 05-10-2017, 19:24

online search Digikey .

gsmsikar · 12-19-2017, 19:43

Quote:

Originally Posted by orx

Hi

1- clean well the stencil with isopropilic / propanol (important ! )
2- put the solder past on stencil On a flat surface
3- Bring in the temperature with your hot air and before removing the ICs over a bit of good flux (imortant! )
4-for removing reballed ic use hot air a max speed .

use good reballing paste ...i use Kester paste very good but expensive.

is there any good video link of these ?

Quote:

Originally Posted by orx

intends balls already ready to be positioned on Ic .. but this you can try on " big" ic as nand, on small ic for me a waste of time ..for mobile is convenient to use stencil Or you can use if you're very skills at pyramid technique with solder iron ..ceck you tube for this.

balls already ready is used for reballing m.board laptop / notebook

what is that above mentioned pyramid technique ?
any video ?

**.:SARCAR:.** · 12-25-2017, 19:54

orx already replied , check youtube , there are so many videos about reballing bga ic's .

gsmsikar · 12-27-2017, 07:46

i have tried finding this pyramid technique with solder iron ,
but didnt get any ,

what is pyramid technique with solder iron ?

orx · 12-29-2017, 09:10

use the stencils and you are much faster these virtuosity for reballing with pyramid technique only serve if you have an ic with a particular design and you do not find the suitable stencil.
I bet that in a speed competition between those who use the stencils and who reball by hand I win

anyway it takes patience and practice for both.

05-06-2017, 21:22	#1 (permalink)
shani1122 Freak Poster Join Date: Oct 2010 Posts: 134 Member: 1422282 Status: Offline Thanks Meter: 23	Bga reballing problem I m having **** problem while reballing chips. Problem is when ever i reball ic it gets stuck in stencile plate. N if i try to remove it then all balls gets destroy. I m really annoyed with this problem . I m using reballing paste for reballing. Anyone can suggest me what should i do? Sent from my iPad using Tapatalk

05-07-2017, 08:37	#2 (permalink)
orx No Life Poster Join Date: Oct 2012 Location: Republic of Serenissima Posts: 1,516 Member: 1825965 Status: Offline Thanks Meter: 874	Hi 1- clean well the stencil with isopropilic / propanol (important ! ) 2- put the solder past on stencil On a flat surface 3- Bring in the temperature with your hot air and before removing the ICs over a bit of good flux (imortant! ) 4-for removing reballed ic use hot air a max speed . use good reballing paste ...i use Kester paste very good but expensive. Last edited by orx; 05-07-2017 at 09:00.

05-08-2017, 20:14	#3 (permalink)
fulviospano Freak Poster Join Date: Aug 2005 Location: Italy Age: 49 Posts: 121 Member: 168904 Status: Offline Thanks Meter: 23	Hold the balls directly on the pitches of the ic

05-10-2017, 16:20	#5 (permalink)
orx No Life Poster Join Date: Oct 2012 Location: Republic of Serenissima Posts: 1,516 Member: 1825965 Status: Offline Thanks Meter: 874	intends balls already ready to be positioned on Ic .. but this you can try on " big" ic as nand, on small ic for me a waste of time ..for mobile is convenient to use stencil Or you can use if you're very skills at pyramid technique with solder iron ..ceck you tube for this. balls already ready is used for reballing m.board laptop / notebook

05-10-2017, 19:24	#7 (permalink)
orx No Life Poster Join Date: Oct 2012 Location: Republic of Serenissima Posts: 1,516 Member: 1825965 Status: Offline Thanks Meter: 874	online search Digikey .

12-25-2017, 19:54	#9 (permalink)
.:SARCAR:. Moderator Join Date: Jul 2006 Location: Midnapore,West-Bengal,India Posts: 5,402 Member: 322206 Status: Offline Sonork: 100.1594813/.:SARCAR:. Thanks Meter: 1,350	orx already replied , check youtube , there are so many videos about reballing bga ic's .

12-27-2017, 07:46	#10 (permalink)
gsmsikar No Life Poster Join Date: May 2003 Posts: 5,667 Member: 28004 Status: Offline Sonork: 100.1601142 Thanks Meter: 770	i have tried finding this pyramid technique with solder iron , but didnt get any , what is pyramid technique with solder iron ?

12-29-2017, 09:10	#11 (permalink)
orx No Life Poster Join Date: Oct 2012 Location: Republic of Serenissima Posts: 1,516 Member: 1825965 Status: Offline Thanks Meter: 874	use the stencils and you are much faster these virtuosity for reballing with pyramid technique only serve if you have an ic with a particular design and you do not find the suitable stencil. I bet that in a speed competition between those who use the stencils and who reball by hand I win anyway it takes patience and practice for both.