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Terminology

Printed From: PCB Libraries Forum
Category: General
Forum Name: General Discussion
Forum Description: general topics not related to other forums
URL: https://www.PCBLibraries.com/forum/forum_posts.asp?TID=1994
Printed Date: 22 Nov 2024 at 5:33am


Topic: Terminology
Posted By: VinS
Subject: Terminology
Date Posted: 04 Nov 2016 at 5:18am
Currently we make our pcb foot prints IAW IPC7351B. Recently I was asked if that met the requirements of J-STD-001F. After reading through both I saw on page 1 of IPC7351B :

"1.1 Purpose
The intent of the information presented herein is to provide the appropriate size, shape and tolerance of surface mount land patterns to insure sufficient area for the appropriate solder fillet to meet the requirements of IPC J-STD-001, and also to allow for inspection, testing, and rework of those solder joints."

That said, the answer is yes.

My question : Does PCB Libraries Expert and LP Wizard satisfy the requirements found in J-STD-001F table 7-7 class 3? How does it take into any variation in solder thickness (G)?

Thanks


Replies:
Posted By: Tom H
Date Posted: 04 Nov 2016 at 7:27am
Library Expert V2016 comes with IPC-7351B default solder joint goals.

Library Expert V2017 comes with IPC-7351C default solder joint goals.

However, Library Expert allows the user to change any of the 60 different terminal settings to any Toe, Heel and Side solder joint goal that the user manufacturing facility wants and needs for their assembly process.

I would say that IPC-7351B is too robust in some cases and too small in other cases. These issues have all been resolved in the IPC-7351C.

Download Surface Mount and Through-hole Component Families and every other document here -
http://www.pcblibraries.com/downloads" rel="nofollow - www.pcblibraries.com/downloads



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