Electronics Forum | Thu Jul 10 02:49:34 EDT 2003 | emeto
Hi! One technique: 1. Remove all balls 2.Make a mask(stensil)for reballing.The holes of the mask must be 0.8-0.9 the size of the pads. 3. Reball chips 4. Reflow chips Good luck
Electronics Forum | Thu Sep 29 20:26:58 EDT 2005 | DasonC
Any aperture/stencil thickness suggestion to provide a rigid solder joint for 0.8mm pitch PBGA with 0.4mm ball diameter. The pad is based on IPC7095 and it is 0.3mm. Thank!
Electronics Forum | Mon Sep 18 01:47:18 EDT 2017 | bukas
I would go with wire thickness + 0.4 to 0.8 mm for pad width, and pre-tinned lenght + 0.5mm what seems to me like problem is that it can easily roll off the pads in reflow oven
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.
Electronics Forum | Wed May 17 11:00:00 EDT 2000 | emmanuel
Has somebody yet process pcb (FR4) with a thickness of 0.8 mm ? Thank you for all kind of responses.
Electronics Forum | Wed Jun 12 22:35:03 EDT 2002 | jkhiew
We had alot of problem with melf diode short together after reflow soldering. The clearance is about 0.8mm & we used "v" shaped opening . PLease comment !
Electronics Forum | Thu Mar 27 12:25:14 EST 2003 | kenlchin
additonally, minimizing the rising rate aroud 183'c and decrease the droping rate(near 0.8'c/s) is also a good way .
Electronics Forum | Wed Dec 08 08:38:46 EST 2004 | davef
KS: You're correct. The standoff on a 1.00mm and 1.25mm BGA is high enough to allow cleaning. The standoff on 0.8mm BGA does not allow proper cleaning, even with saponifiers.
Electronics Forum | Wed Apr 13 08:00:57 EDT 2005 | davef
Dimension mm (LXW)||JIA||EIA 1.0X0.5||1005||0402 1.6X0.8||1608||0603
Electronics Forum | Mon Sep 26 07:56:38 EDT 2005 | pavel_murtishev
Hi! Try to make "R_AXIS_ACCURACY" calibration for all of FNC heads for back camera only. I met such problem on Topaz-X. There was clearly seen offset on 0.8mm pitch components. I simply calibrated all cameras for FNC nozzles and problem disappeared.
