Electronics Forum: hole (Page 1 of 309)

thru hole

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

Pin hole

Electronics Forum | Wed Mar 10 18:42:34 EST 2010 | 89jeong

Hello Sir. We also encountered the same pin-hole issue but there was around MLCC.I also looked for some information in technical report and internet, But i failed to get an answer. As you know this pin hole or blow hole is caused by the solder boilin

thru hole

Electronics Forum | Wed Dec 17 09:53:26 EST 2003 | davef

IPC-2222 - Sectional Design Standard For Printed Board For Organic Printed Boards, Table 9-3 � Plated Through Hole Diameter To Lead Diameter Relationships will give you the standard information you require. If we can�t get proper hole fill after try

hole blister

Electronics Forum | Mon Sep 14 08:07:24 EDT 2009 | davef

You have a board fabrication defect. Search the web for "hole wall pullaway" Performing a microsection is the best way to analyze the defect.

Pin hole

Electronics Forum | Thu Mar 11 03:03:26 EST 2010 | grahamcooper22

Hi , Looking at your photo....can I also see a hole in the middle of the joint on the chip component ? Maybe its not just a problem with th ejoint son diodes ? Did you also get mid chip solder balls on chips? If so, I'd almost guarantee the pcb has t

thru hole

Electronics Forum | Wed Dec 17 10:10:35 EST 2003 | Hiram

Thanks Dave, your comments were very helpful! Hiram

Pin hole

Electronics Forum | Thu Mar 11 02:56:01 EST 2010 | grahamcooper22

Hi, blow holes / pin holes / holes in joints are usually a sign that there is excess moisture somewhere around the solder joint. Moisture can be in pcbs / components, so try drying them....a simple thing to do is pass a bare pcb throught your reflow

hole blister

Electronics Forum | Sun Sep 13 19:56:21 EDT 2009 | 89jeong

Hi All I have a pig problem after reflow. It is a blister in hole.It happend after reflow(Lead free solder) I touched the blister with tweezer. The plating was lifted off easily How do i do? What is a root casue? Drilling or plating? Is it possible

Pin hole

Electronics Forum | Tue Mar 09 20:50:40 EST 2010 | jkhiew

We have encountered high percentage of pin holes issue after lead-free reflow soldering from particular diode supplier that manufactured at Morocco. However, very little reject being found if the particular component is manufactured at China by using

hole blister

Electronics Forum | Fri Sep 18 09:22:03 EDT 2009 | ysutariya

Don't forget the possibility of excess moisture absorption. If this is lead free, then the laminate manufacturers state that you should bake prior to assembly. Was this completed?

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