Electronics Forum | Wed Dec 18 08:38:17 EST 2002 | davef
Thanks Tim. Additional thoughts are: * We've talked here on SMTnet about hole fill previously. * That your ability to get hole fill is probably limited by mask in the hole makes us very uneasy, because hole could have varying levels of solder mask i
Electronics Forum | Tue Dec 16 19:45:47 EST 2003 | Hiram
Hi, I am looking for the IPC criteria hole-to-lead ratio. Does anybody know a practical way to determine if some holes in my pcb's do not get enough solder in the wave solder machine because an inapropiate hole-to-lead ratio? Thanks in advance! Hi
Electronics Forum | Tue May 09 14:19:52 EDT 2006 | Larry (not THAT Larry)
Smartasp - What are your lead to hole ratios like? Dial down the flux and open up the holes, if you can. Keeping at least a 14-20 mil gap between min hole/max lead solves the hole fill problem. L
Electronics Forum | Tue May 02 11:07:27 EDT 2006 | azbvc
Hi, I have a problem on removing the rivet after fitting to the PCB hole as the hole becomes loose. My questions are: 1) How to fix the loosen PCB hole? 2) What is the good practice to remove the rivet without damage the PCB hole? Your help is muc
Electronics Forum | Tue Jul 18 07:39:52 EDT 2006 | Chunks
Is the hole always in the same solder joint? What parts do you see the hole(s) on? Can you try a different paste?
Electronics Forum | Thu Sep 27 09:28:42 EDT 2007 | jgrootkoerkamp
Thanks for all the answers. Is it also possible with lead free soldering to produce little holes in the solder that are not blowholes? We see holes where you can see the end of the hole (not very deep). The holes are always on the same places.
Electronics Forum | Tue Oct 07 03:03:06 EDT 2008 | rafacadiz
We had the same problem last year. You need verify these key points. 1- Holes are drill, NOT PUNCH. 2- Inspect 100 Boards at microscope, and verify that there is not rest of fibers in the holes. 3- Meassure the dimensions of the holes. a) virgi
Electronics Forum | Mon Jan 11 14:48:44 EST 2010 | davef
SR1000 is commonly used for tenting. Search the fine SMTnet Archives on : tenting Someone gave us this note. We have lost their name. It seems to be good advice. If Liquid Photo Image (LPI) solder mask is required, do not tent via holes. Tenting
Electronics Forum | Sat Jan 15 21:52:15 EST 2000 | Dave Bartlett
I am looking for information comparing the reliability of smt boards vs thru hole boards. Also, information on when to use thru hole instead of smt if there is such a case. Background - We currently make temperature controller with a mix or smt and
Electronics Forum | Thu Nov 26 00:34:30 EST 1998 | Brian G.
Certain board designs require the unavoidable use of non-plated holes and slots. Presently, this requires a trip back to the drill house to open up the aforementioned holes, to remove the unwanted plating. In situations requiring non-plated holes and
