文档介绍：? IPC 1997IPC–PE-740Revision ADecember 1997TroubleshootingforPrinted BoardManufactureand AssemblyDeveloped byTHE INSTITUTEFOR?INTERCONNECTING?AND PACKAGING?ELECTRONIC CIRCUITSThe Principles ofStandardizationIn May 1995 the IPC’s Technical Activities mittee adopted Prin-ciples of Standardization as a guiding principle of IPC’s standardization Should:? Show relationship to DFM & DFE? Minimize time to market? Contain simple (simpli?ed) language? Just include spec information? Focus on end product performance? Include a feed back system on use and problems for future improvementStandards 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 dataNoticeIPC Standards and Publications are designed to serve the public interest througheliminating 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 forhis particular need. Existence of such Standards and Publications shall notin any respect preclude any member or nonmember of IPC from manufacturingor selling products not conforming to such Standards and Publication, norshall the existence of such Standards and Publications preclude their voluntaryuse by those other than IPC members, whether the standard is to be usedeither domestically or Standards and Publications are adopted by IPC without regard towhether their adoption may involve patents on articles, materials, or such action, IPC does not assume any liability to any patent owner, nordo they assume any obligation whatever to parties adopting the mendedStandard or Publication. Users are also wholly responsible for protectingthemselves against all claims of liabilities for patent material in this standard was developed by the Proc