Even with the PDF in hand, engineers make errors. Avoid these:
IPC-2221B (2015) added HDI requirements and updated thermal models. If you have an old IPC-2221A PDF from 2003, it is obsolete.
The IPC-2221 standard, titled Generic Standard on Printed Board Design
Even with the PDF in hand, engineers make errors. Avoid these:
IPC-2221B (2015) added HDI requirements and updated thermal models. If you have an old IPC-2221A PDF from 2003, it is obsolete.
The IPC-2221 standard, titled Generic Standard on Printed Board Design