Transcription of Generic Standard on Printed Board Design
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Generic Standard on Printed Board Design
IPC-2221B.. Generic Standard on Printed Board Design Developed by the IPC-2221 Task Group (D-31b) of the Rigid Printed Board Committee (D-30) of IPC. Supersedes: Users of this publication are encouraged to participate in the IPC-2221A - May 2003 development of future revisions. IPC-2221 - February 1998. Contact: IPC. 3000 Lakeside Drive, Suite 309S. Bannockburn, Illinois 60015-1249. Tel 847 Fax 847 November 2012 IPC-2221B. Table of Contents 1 SCOPE .. 1 4 MATERIALS .. 21. Purpose .. 1 Material Selection .. 21. Documentation Hierarchy .. 1 Material Selection for Structural Strength .. 21. Presentation .. 1 Material Selection for Electrical Properties .. 21. Dimensional Units .. 1 Material Selection for Environmental Interpretation .. 1 Properties .. 21. Definition of Terms .. 2 Dielectric Base Materials (Including Prepregs and Adhesives) .. 21. Microvia.
Figure 5-3A Multilayer Metal Core Printed Board with Two Symmetrical Copper-Invar-Copper Constraining Cores (when the Copper-Invar-Copper planes are connected to the plated-through hole, use thermal relief per Figure 9-4) ..... 43 Figure 5-3B Symmetrical Constraining Core Printed Board with a Copper-Invar-Copper
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