PCB Libraries Forum : Chip Array Solder Joint Goals https://www.PCBLibraries.com/forum/ Thu, 16 Apr 2026 03:30:42 +0000 Wed, 01 Aug 2012 09:59:27 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.07 360 https://www.PCBLibraries.com/forum/RSS_post_feed.asp?TID=483 <![CDATA[PCB Libraries Forum]]> https://www.PCBLibraries.com/forum/forum_images/PCBLForumLogo.gif https://www.PCBLibraries.com/forum/ <![CDATA[Chip Array Solder Joint Goals : You are OK using PCB Footprint...]]> https://www.PCBLibraries.com/forum/chip-array-solder-joint-goals_topic483_post1472.html#1472 Author: Tom H
Subject: 483
Posted: 01 Aug 2012 at 9:59am

You are OK using PCB Footprint Expert "Least" environment.
 
The PCB Footprint Expert uses advanced technology for the unreleased version IPC-7351C.
 
If you want to know the differences between IPC-7351B and IPC-7351C download the Power Point presentation here -
http://www.pcblibraries.com/forum/pcb-library-optimization-presentation-free_topic468.html
 
The < 1.6 mm is being updated to < 2.0 mm to define mico-miniature component packages. The < 1.6 mm was originally defined as any component body length less than an 0603 (metric 1608) package, when in fact, the 0603 needs to be included in the mico-miniature component package category.
 
]]> Wed, 01 Aug 2012 09:59:27 +0000 https://www.PCBLibraries.com/forum/chip-array-solder-joint-goals_topic483_post1472.html#1472 <![CDATA[Chip Array Solder Joint Goals : I see the difference, but now...]]> https://www.PCBLibraries.com/forum/chip-array-solder-joint-goals_topic483_post1471.html#1471 Author: rickdehart
Subject: 483
Posted: 01 Aug 2012 at 9:45am

I see the difference, but now I'm looking at Solder Joint Goals for > 1.6mm at Least.  (Not micro-miniature)
 
IPC (Least) Toe = 0.35, Heel = -0.10, Side = -0.10
Footprint Expert (Least) Toe = 0.15, Heel = 0, Side = -0.05
 
Do I have outdated numbers for IPC?  Am I okay using the Footprint Expert (Least) numbers?
]]> Wed, 01 Aug 2012 09:45:18 +0000 https://www.PCBLibraries.com/forum/chip-array-solder-joint-goals_topic483_post1471.html#1471 <![CDATA[Chip Array Solder Joint Goals : It depends on the size of...]]> https://www.PCBLibraries.com/forum/chip-array-solder-joint-goals_topic483_post1468.html#1468 Author: Tom H
Subject: 483
Posted: 31 Jul 2012 at 7:42am

It depends on the size of the Chip Array.
 
Body Length 2 mm or greater Toe= 0.35, Heel= -0.10, Side= -0.10
 
Body Length less than 2 mm Toe=0.20, Heel= 0.00, Side= 0.00
 
Same theory standard Chip Resistors & Capacitors.
 
The are solder joint goals for micro-miniature components must be reduced to avoid excess solder to prevent solder balls and tombstoning.
  
]]> Tue, 31 Jul 2012 07:42:26 +0000 https://www.PCBLibraries.com/forum/chip-array-solder-joint-goals_topic483_post1468.html#1468 <![CDATA[Chip Array Solder Joint Goals : I noticed adifference between...]]> https://www.PCBLibraries.com/forum/chip-array-solder-joint-goals_topic483_post1439.html#1439 Author: rickdehart
Subject: 483
Posted: 26 Jul 2012 at 2:08pm

I noticed a difference between IPC chip array solder joint goals of Toe= 0.35, Heel= -0.10, Side= -0.10 and PCB Libraries solder joint goals of Toe=0.20, Heel= 0.00, Side= 0.00.  Can you correct me if I'm wrong and if not can you please explain?
Thanks,
Rick
]]> Thu, 26 Jul 2012 14:08:52 +0000 https://www.PCBLibraries.com/forum/chip-array-solder-joint-goals_topic483_post1439.html#1439