Electronics Forum | Wed May 29 17:17:49 EDT 2002 | wilcoxito
As far as aperture dimensions go, I found a technical note written by Micron that recommends using "square apertures with sides equal in length to the diameter of the PCB pad. The corners of the square should also be slightly rounded, and the apertu
Electronics Forum | Thu Jul 26 14:47:49 EDT 2018 | tsvetan
RS274D contain just NC info and requires external aperture file, RS274X combine aperture and NC info together. You can download RS274X format specs and learn them, it's easy to make RS274X from RS274D + aperture file (basically you copy the aperture
Electronics Forum | Mon Sep 17 15:27:51 EDT 2001 | jschake
Challenges: The basic defects that impact assembly yield are bridging, satellite solder balls, and opens (i.e. tombstones / draw bridges). There are many variables with the stencil printing process that can impact these; several of them are listed
Electronics Forum | Fri Mar 03 14:08:55 EST 2000 | Michael Parker
Your best answer for determining cleaning method is to contact your stencil supplier and follow their recommendation. Periodic inspection of your apertures (using microscope, or minimum 10x magnification) would also be a good idea to make sure that g
Electronics Forum | Wed Aug 09 04:16:25 EDT 2000 | Jarno Py�ri�
And little more... If you use chip components, then that 80% from pads is good stencils apertures size. But if you use fine pitch components, example QFP, then you can use apertures, 90% from pads. I hoping that you understand something abou
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 | Thu Jun 29 09:46:41 EDT 2000 | sree
Hi Jax, The microbga discussed earlier in the forum is mounted on 16 mils pad whereas mine is on 12 mils pad. Can I use the same aperture opening ?Please advise.
Electronics Forum | Fri Jun 02 19:38:12 EDT 2000 | Ravi Bhat
Robert, I think I am late, but better be late than never. Did you get solution to your problem. If not, Can you give me the stencil aperture dimensions and aperture type ? I think I can give you some insight into this.
Electronics Forum | Fri Mar 03 14:08:55 EST 2000 | Michael Parker
Your best answer for determining cleaning method is to contact your stencil supplier and follow their recommendation. Periodic inspection of your apertures (using microscope, or minimum 10x magnification) would also be a good idea to make sure that g
Electronics Forum | Fri Jul 13 14:56:01 EDT 2001 | stevenamacdonald
One of our board vendors recently switched their stencil design to home plate apertures. Since the change the quality and yield of their PCB's has went south, Could this process change be the cause?
