PCB Libraries Forum Homepage
Forum Home Forum Home > Libraries > PCB Library Construction Guidelines
  New Posts New Posts RSS Feed - Standard Chip Package Case Codes & Dimensions
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Standard Chip Package Case Codes & Dimensions

 Post Reply Post Reply Page  <12
Author
Message
Tom H View Drop Down
Admin Group
Admin Group
Avatar

Joined: 05 Jan 2012
Location: San Diego, CA
Status: Offline
Points: 5239
Post Options Post Options   Thanks (0) Thanks(0)   Quote Tom H Quote  Post ReplyReply Direct Link To This Post Posted: 08 Sep 2021 at 8:32am
Read the User Guide in the main installation folder under "Documents". 

  • Charter 1 Footprint Expert Console Options
  • Charter 2 Footprint Expert Calculator Options - Pad Stack Rules
  • Charter 3 Footprint Expert Calculator Options – Drafting
  • Charter 4 Footprint Expert Calculator Options – Fiducials
  • Charter 5 Footprint Expert Toolbar Icons and Menu Options
You cannot edit the program Master Options. You need to create your personal option files (as many as you want). 

Select File > Save As > Your Master Options .opt

Stay connected - follow us! Twitter - LinkedIn
Back to Top
AnonAnon View Drop Down
New User
New User


Joined: 07 Feb 2022
Status: Offline
Points: 1
Post Options Post Options   Thanks (0) Thanks(0)   Quote AnonAnon Quote  Post ReplyReply Direct Link To This Post Posted: 07 Feb 2022 at 5:41am
Hi Tom,

Please excuse me if you've answered this a thousand times but I'm looking to find which standard defined the "Least" and "Most" limits for each footprint. I can see IPC-SM-782 defines the nominal and references equations in a section 3.3? I am happy to purchase the standard but wanted to ensure it contained the correct information before I purchase.

Do the IPC standards only provide the nominal and one has to calculate the limits?

Kind regards,

David
Back to Top
Tom H View Drop Down
Admin Group
Admin Group
Avatar

Joined: 05 Jan 2012
Location: San Diego, CA
Status: Offline
Points: 5239
Post Options Post Options   Thanks (0) Thanks(0)   Quote Tom H Quote  Post ReplyReply Direct Link To This Post Posted: 07 Feb 2022 at 10:01am
IPC-7351B contains the 3-Tier Density Levels for Land Patterns. 

However, that document is 12 years old and out of date and it took information from the 1987 IPC-SM-782 which is obsolete.

The solder Joint values are way too robust for today's technology. 

Footprint Expert solder joint goals are derived from IPC J-STD-001 standard as it's the main standard that all other standards are built upon. 

Stay connected - follow us! Twitter - LinkedIn
Back to Top
 Post Reply Post Reply Page  <12

Forum Jump Forum Permissions View Drop Down



This page was generated in 0.078 seconds.