Electronics Forum | Thu Nov 20 12:10:20 EST 2003 | frank
Well, let me take a shot... +/-100um = 0.1mm 5 sigma = is the number of acceptable defects (or placements outside of that accuracy (or tolerance). I believe 5 sigma is 233 defects out of 1 million, but I could be wrong on that. So basically all pl
Electronics Forum | Tue Aug 20 21:39:29 EDT 2019 | sssamw
6 mil (0.15mm) for the 1.13mm pitch BGA, and 4 mil (0.1mm) for the smal QFN with 0.4mm pitch.
Electronics Forum | Fri Jun 15 05:28:55 EDT 2012 | eniac
DeanM, if I understood correct, you use fiducial with dimension 0.1 mm and increased it to 0.15 mm. Why use use small fiducials? You don't have free space on your PCBs?
Electronics Forum | Tue May 07 08:04:17 EDT 2002 | Sir Alexandr
Sorry if info is useless, but placement machines must have own system programs for completly ajustment of placement in a gap about 0.01 mm . Also headblock camera has enought increment to found correct place and fiducial setups utility. Maybe your lo
Electronics Forum | Sun Mar 25 08:49:49 EDT 2018 | jacobidiego
Hi experts, Is it normal that a stencil of 0,1mm would produce 45% solder paste volume being printed over the board? Or is a property linked to the solder paste? thanks in advance
Electronics Forum | Mon Mar 26 16:33:54 EDT 2018 | jacobidiego
I realize that I wrote wrong. Sry The stencil of 0,1mm of thickness is printing 45% more volume. I know this becouse the SPI is setup with the stencil gerbers and the messurements have a median of 145% of volume. what do you mean with excesive sold
Electronics Forum | Fri Mar 27 03:42:17 EDT 2020 | sssamw
Did you try 0.12 or 0.1mm nano coated stencil @ 10 mil aperture? A soak time type profile with long reflow time could help.
Electronics Forum | Fri Aug 24 09:38:17 EDT 2001 | gerits
Hi, you can use the Assembleon (Philips) ACM Micro for this. It can place Flip Chip form 0,1x0,1mm upto micro BGA, CSP's etc. etc. It even can handle Odd's and insert components. Web-site http://www.assembleon.com Please contcat me or our company o
Electronics Forum | Fri Jun 15 08:00:08 EDT 2012 | deanm
ENIAC, 0.040" equates to 1mm, not 0.1mm. 0.040" is the IPC minimum recommended fiducial size and when we started putting fiducials on our boards I assumed that all equipment manufacturers should be able to automatically spot that size. Since then I'v
Electronics Forum | Wed Jun 15 00:50:32 EDT 2005 | Frank
From my understanding: Sigma is the same as one standard deviation. So 3 sigma is the same as 3 standard deviations. It all boils down to how repeatable your machine is. Another way to look at it is the probability (or confidence) that the machin
