IPC-4552B-2021 EN印制板化学镀镍 浸金(ENIG)镀覆性能规范 英文版.pdf

IPC-4552B 2021 - April Specification for Electroless Nickel/Immersion Gold (ENIG) Plating for Printed Boards Supersedes IPC-4552A August 2017 An international standard developed by IPC The Principles of In May 1995 the IPC’s Technical Activities Executive Committee (TAEC) adopted Principles of Standardization Standardization as a guiding principle of IPC’s standardization efforts. Standards Should: Standards Should Not: • Show relationship to Design for Manufacturability • Inhibit innovation (DFM) and Design for the Environment (DFE) • Increase time-to-market • Minimize time to market • Keep people out • Contain simple (simplified) language • Increase cycle time • Just include spec information • Tell you how to make something • Focus on end product performance • Contain anything that cannot • Include a feedback system on use and be defended with data problems for future improvement Notice IPC Standards and Publications are designed to serve the public interest through eliminating mis- understandings between manufacturers and purchasers, facilitating interchangeability and improve- ment