IPC WP-021-2019

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Association Connecting Electronics Industries

IPC-WP-021

2019 – September

Considerations of New Classes of

Coatings for IPC-CC-830

Revision C

A White Paper Report Developed by IPC

In May 1995 the IPC’s Technical Activities Executive Committee (TAEC) adopted Principles of

Standardization as a guiding principle of IPC’s standardization efforts.

Standards Should:

• Show relationship to Design for Manufacturability

(DFM) and Design for the Environment (DFE)

• Minimize time to market

• Contain simple (simplied) language

• Just include spec information

• Focus on end product performance

• Include a feedback system on use and

problems for future improvement

IPC Standards and Publications are designed to serve the public interest through eliminating misun-

derstandings between manufacturers and purchasers, facilitating interchangeability and improvement

of products, and assisting the purchaser 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 pre-

clude 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 adop-

tion 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.

It is the position of IPC’s Technical Activities Executive Committee that the use and implementation

of IPC publications is voluntary and is part of a relationship entered into by customer and supplier.

When an IPC publication is updated and a new revision is published, it is the opinion of the TAEC

that the use of the new revision as part of an existing relationship is not automatic unless required by

the contract. The TAEC recommends the use of the latest revision. Adopted October 6, 1998

Your purchase of this document contributes to the ongoing development of new and updated industry

standards and publications. Standards allow manufacturers, customers, and suppliers to understand

one another better. Standards allow manufacturers greater efciencies when they can set up their

processes to meet industry standards, allowing them to offer their customers lower costs.

IPC spends hundreds of thousands of dollars annually to support IPC’s volunteers in the standards

and publications development process. There are many rounds of drafts sent out for review and the

committees spend hundreds of hours in review and development. IPC’s staff attends and participates

in committee activities, typesets and circulates document drafts, and follows all necessary procedures

to qualify for ANSI approval.

IPC’s membership dues have been kept low to allow as many companies as possible to participate.

Therefore, the standards and publications revenue is necessary to complement dues revenue. The

price schedule offers a 50% discount to IPC members. If your company buys IPC standards and pub-

lications, why not take advantage of this and the many other benets of IPC membership as well? For

more information on membership in IPC, please visit www.ipc.org or call 847/597-2872.

Thank you for your continued support.

The Principles of

Standardization

Notice

IPC Position

Statement on

Specication

Revision Change

Why is there a

charge for this

document?

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

Any copying, scanning or other reproduction of these materials without the prior written consent of the copyright holder is strictly

prohibited and constitutes infringement under the Copyright Law of the United States.

IPC-WP-021

Considerations of New

Classes of Coatings for

IPC-CC-830 Revision C

Developed by the Ultra-thin Coating Working Group (5-33AUT) of the

Cleaning and Coating Committee (5-30) of IPC

Users of this publication are encouraged to participate in the

development of future revisions.

Contact:

IPC

3000 Lakeside Drive, Suite 105N

Bannockburn, Illinois

60015-1249

Tel 847 615.7100

Fax 847 615.7105

Association Connecting Electronics Industries

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摘要：

IPC WP-021-2019 是国际电子工业联接协会（IPC）发布的白皮书（White Paper）技术文档，标题为《无铅焊接工艺中可接受性与可靠性之间的权衡》。该文件系统阐述了在无铅焊接过程中，如何平衡产品外观验收标准与长期使用可靠性之间的关系，重点分析了焊点空洞、锡珠残留、润湿不良等常见缺陷在不同应用场景下的可接受阈值。文档基于行业多年数据与实验验证，为电子制造工程师、质量管理人员及设计人员提供了从IPC-A-610标准出发的补充指导，尤其适用于汽车电子、医疗设备和航空航天等高可靠性领域。

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IPC WP-021-2019

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