PCB Libraries Forum : Non-collapsing vs Collapsing BGA Balls

PCB Libraries Forum : Non-collapsing vs Collapsing BGA Balls https://www.PCBLibraries.com/forum/ Mon, 20 Apr 2026 22:39:24 +0000 Tue, 16 Jun 2015 19:09:12 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.07 360 https://www.PCBLibraries.com/forum/RSS_post_feed.asp?TID=1708 <![CDATA[PCB Libraries Forum]]> https://www.PCBLibraries.com/forum/forum_images/PCBLForumLogo.gif https://www.PCBLibraries.com/forum/ <![CDATA[Non-collapsing vs Collapsing BGA Balls : Thanks a million Tom! ]]> https://www.PCBLibraries.com/forum/noncollapsing-vs-collapsing-bga-balls_topic1708_post6978.html#6978 Author: tatets
Subject: 1708
Posted: 16 Jun 2015 at 7:09pm

Thanks a million Tom!]]> Tue, 16 Jun 2015 19:09:12 +0000 https://www.PCBLibraries.com/forum/noncollapsing-vs-collapsing-bga-balls_topic1708_post6978.html#6978 <![CDATA[Non-collapsing vs Collapsing BGA Balls : Question is, should 0.30-0.75...]]> https://www.PCBLibraries.com/forum/noncollapsing-vs-collapsing-bga-balls_topic1708_post6954.html#6954 Author: Tom H
Subject: 1708
Posted: 11 Jun 2015 at 7:19am

Question is, should 0.30-0.75 ball diameter still applicable for 0.500 pitch packages?

Question is, should 0.15-0.25 ball diameter still applicable for 0.65 pitch packages?

Here is the Ball Size to Pin Pitch table from IPC-7351B:

]]> Thu, 11 Jun 2015 07:19:23 +0000 https://www.PCBLibraries.com/forum/noncollapsing-vs-collapsing-bga-balls_topic1708_post6954.html#6954 <![CDATA[Non-collapsing vs Collapsing BGA Balls : Hi,Looking at the tables below,...]]> https://www.PCBLibraries.com/forum/noncollapsing-vs-collapsing-bga-balls_topic1708_post6952.html#6952 Author: tatets
Subject: 1708
Posted: 10 Jun 2015 at 8:30pm

Hi,

Looking at the tables below, for non-collapsing we use 0.25 (or less) nominal land diameter for 0.50mm pitch packages. Question is, should 0.30-0.75 ball diameter still applicable for 0.500 pitch packages? Will the land pads not cause any bridging due to space constraints?

Similary, for collapsing we use 0.30 (or higher) nominal land diameter for 0.65mm pitch packages. Question is, should 0.15-0.25 ball diameter still applicable for 0.65 pitch packages? Will the land pads not cause any reliability issues due to smaller pads?

Thanks in advance for your help.

Collapsing Ball

Non-collapsing

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