BGA Pad Size Calculation
Printed From: PCB Libraries Forum
Category: PCB Footprint Expert
Forum Name: Questions & Answers
Forum Description: issues and technical support
URL: https://www.PCBLibraries.com/forum/forum_posts.asp?TID=1567
Printed Date: 23 Nov 2024 at 7:08am
Topic: BGA Pad Size Calculation
Posted By: robmeyer
Subject: BGA Pad Size Calculation
Date Posted: 20 Feb 2015 at 12:57am
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Hello, When I understand the documents I could download from your side and the IPC-7351B correct, then the Pad Size for a BGA with a 0.6 mm Ball should be 0.45mm. But the library expert make the Pads 0.5 mm. I think this is a bug. Thanks Robert |
Replies:
Posted By: Tom H
Date Posted: 20 Feb 2015 at 9:14am
It is very important
to note that IPC-7351 prefers the Maximum Material Condition for all BGA Land
sizes; they do not use the Nominal Land Diameter, but do use the Maximum Land
Variation Diameter (notice the Bold
numbers in the Red box in the Chart “Land Variation” column).  ------------- Stay connected - follow us! https://twitter.com/PCBLibraries" rel="nofollow - X - http://www.linkedin.com/company/pcb-libraries-inc-/" rel="nofollow - LinkedIn |