IPC-7721(S).pdf - 第4页
The Principles of Standardization In May 1995 the IPC’ s T echnical Activities Executive Committee adopted Prin- ciples of Standardization as a guiding principle of IPC’ s standardization efforts. Standards Should: • Sho…
IPC-7721
Repair and Modification
of Printed Boards and
Electronic Assemblies
Developed by the Printed Board Repair Task Group (7-34a) of the
Institute for Interconnecting and Packaging Electronic Circuits
Users of this standard are encouraged to participate in the
development of future revisions.
Contact:
IPC
2215 Sanders Road
Northbrook, Illinois
60062-6135
Tel 847 509.9700
Fax 847 509.9798
T
HE
I
NSTITUTE FOR
I
NTERCONNECTING
AND
P
ACKAGING
E
LECTRONIC
C
IRCUITS
The Principles of
Standardization
In May 1995 the IPC’s Technical Activities Executive Committee adopted Prin-
ciples of Standardization as a guiding principle of IPC’s standardization efforts.
Standards Should:
• Show relationship to DFM & DFE
• Minimize time to market
• Contain simple (simplified) language
• Just include spec information
• Focus on end product performance
• Include a feed back system on use and problems for future improvement
Standards Should Not:
• Inhibit innovation
• Increase time-to-market
• Keep people out
• Increase cycle time
• Tell you how to make something
• Contain anything that cannot be defended with data
Notice
IPC Standards and Publications are designed to serve the public interest through
eliminating misunderstandings between manufacturers and purchasers, facilitat-
ing interchangeability and improvement of products, and assisting the pur-
chaser in selecting and obtaining with minimum delay the proper product for
his particular need. Existence of such Standards and Publications shall not
in any respect preclude any member or nonmember of IPC from manufacturing
or selling products not conforming to such Standards and Publication, nor
shall the existence of such Standards and Publications preclude their voluntary
use by those other than IPC members, whether the standard is to be used
either domestically or internationally.
Recommended Standards and Publications are adopted by IPC without regard to
whether their adoption may involve patents on articles, materials, or processes.
By such action, IPC does not assume any liability to any patent owner, nor
do they assume any obligation whatever to parties adopting the Recommended
Standard or Publication. Users are also wholly responsible for protecting
themselves against all claims of liabilities for patent infringement.
The material in this standard was developed by the Printed Board Repair Task
Group (7-34a) of the Institute for Interconnecting and Packaging Electronic
Circuits.
Copyright © 1998 by the Institute for Interconnecting and Packaging Electronic Circuits. All rights reserved. Published 1998. Printed in the
United States of America.
No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission
of the publisher.
Foreword
IPC’s documentation strategy is to provide distinct documents that focus on specific aspects of electronic packaging issues.
In this regard document sets are used to provide the total information related to a particular electronic packaging topic. A
document set is identified by a four digit number that ends in zero (0) (i.e., IPC-7710).
This standard is intended to provide information on the rework, repair and modification of printed boards and electronic
assemblies. This information must also be supplemented by a performance specification that contains the requirements for
the chosen technology. When used together, these documents should lead both manufacturer and customer to consistent
terms of acceptability.
These documents supersede the following:
IPC-7711 supersedes IPC-R-700C
IPC-7721 supersedes IPC-R-700C
As technology changes, a performance specification will be updated, or new focus specifications will be added to the docu-
ment set. The IPC invites input on the effectiveness of the documentation and encourages user response through completion
of ‘‘Suggestions for Improvement’’ forms at the end of each document.