Electronics Forum | Tue Nov 30 07:53:16 EST 2010 | edmaya33
could be a printer or stencil issue. try to check your printing repeatability. Suggest to use SPI for a checking paste volume/height/area.A regular stencil cleaning may reduced your headache.
Electronics Forum | Tue May 22 10:01:19 EDT 2018 | jacson_vu
Hi All, Could you share for me inspection spec that you set up for SPI machine ? Which standard you base that? IPC or something like that. So far, my factory set up as below: Area , volume , high are: lower limit is 60%, upper limit 160% for 0201 ch
Electronics Forum | Tue Mar 27 06:27:41 EDT 2018 | cyber_wolf
Occasionally when circuit boards are manufactured, there may be issues with solder mask coverage. It is not uncommon to re-run back through this process to fix missing or thin areas. This can causes the traces to become higher which in turn raises th
Electronics Forum | Tue Jun 05 02:10:01 EDT 2018 | buckcho
Hello sir, Limits in SPI can vary a lot, also depending on finishing of the pcb. For example 170% volume on an IC (assuming is fine pitch) can be okay for ENIG, but very bad if HASL. For are I would recommend that you use either 50-130, or 60-135 max
Electronics Forum | Wed Jun 17 07:08:58 EDT 2015 | armandogomez
Hello PAWEL before you go and buy a machine that cleans you pcb, have you check the current conditions where the pcbs are storage? hair, speck of dirt, fiber and other things sounds to me that the area where you work with these pcbs is not very clea
Electronics Forum | Thu May 20 15:58:36 EDT 2021 | rsatmech
My product has 2.4Mil and 3.1Mil stencil. For both the stencil my SPI specification is set as 30% to 160% How this is calculated. Can anyone enlight me. Solder Paste type 5. Minimum opening is 0.16*0.18mm in stencil.
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