Electronics Forum | Thu Jan 06 08:03:47 EST 2005 | davef
On solder in vias: It looks like the via are not solder masked well and pick-up solder either: * Solder coating ... OR * During leveling It's possible that the design specifies openings in the solder mask for these via. On solder in the unsupporte
Electronics Forum | Thu Mar 15 13:27:45 EDT 2007 | Pete
We had a customer do a similar thing. We notified our customer and educated them on what was happening. We were instructed to try one and report on the results, as the vias were supposed to be filled (and weren't). We pasted and reflowed and as su
Electronics Forum | Fri Mar 26 17:12:17 EST 2004 | ben
I have recently encountered a new pcb design with a very high density of components on either side of the pcb. One of the suggested "fixes" is to use the smt pads as vias i.e. the via will be drilled thorough the centre of the smt pad. My concern i
Electronics Forum | Sat Sep 14 01:34:19 EDT 2002 | Yngwie
I have the following questions on Via in Pad and want to understand each of them wrt : - complete Via in pad - partial encroachment - via partially in pad 1) What is the general feel for via in pad for upcoming designs? 2) What are the manufacturi
Electronics Forum | Tue Sep 17 00:40:39 EDT 2002 | yngwie
Hi all Experts, Desperately need your help on the following questions on Via in Pad and want to understand each of them wrt : - complete Via in pad - partial encroachment - via partially in pad 1) What is the general feel for via in pad for upcom
Electronics Forum | Wed Mar 14 13:16:54 EDT 2007 | Shane
I have a customer that designed a fine pitch BGA into a board, and has put small vias in the middle of each pad on the PCB. Anyone have any ideas on how I can prevent the solder from the BGA from flowing through the vias and causing voids or no cont
Electronics Forum | Fri Mar 23 09:13:48 EDT 2007 | Peter W
Hello, those plated and solderable via in pads have two critical points: 1. We have discovered that _sometimes_ the plating seems not to be perfect, as extreme voiding is visible in tha bga solder ball 2. The detection of some defects by AXI is limi
Electronics Forum | Wed Oct 16 11:51:03 EDT 2002 | Brian W.
Pink Lady refers to solder stop, or temporary solder mask. There are a couple of types. Peelable, which you must peel off after processing, before wash, and of course before you ship. There is also a water soluble version, which dissolves in the w
Electronics Forum | Sat Oct 12 05:40:05 EDT 2002 | Kenture
Hello All, I am having issued with insufficient solder due to via in pad. It is a 10 mils via and PCB is 70 mil thick. Six mils stencils was used since there are some 20 mils (No clean process). Any recommendation? Thank you.
Electronics Forum | Tue Oct 15 16:03:45 EDT 2002 | davef
Abelardo, In your response on this thread you mention "pink lady". Please help us understand "pink lady" better. Is that a temporary solder mask?
