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As chip sizes continue to shrink and system features continue to expand, it becomes more and more difficult for designers to remember circuit board layout parameters and specification requirements.
The renewal of the electrical test part in the new standard reflects the industry's emphasis on product quality and reliability. Perry said, "The newly added content in electrical testing introduces test methods such as continuity testing, high voltage testing, and impedance testing. In general, one test method cannot meet all test requirements. I hope designers have the courage to choose Two to three test methods to meet customer requirements.
Due to the increase in the number of through-holes on the circuit board, through-hole protection is particularly important, and IPC-2221B also adds this aspect. Another important part of the standard update is the acceptability of test boards and periodic conformance testing in Appendix A. Its performance indicators are in accordance with the identification and performance specifications of IPC-6012C rigid printed boards and IPC-6013C flexibility. Identification and performance specifications of printed boards.
For example, the AB/R test board used for metal via evaluation and thermal stress testing has been designed to include blind vias, buried vias, and microvia structures. The design of the AB/R test board and the other eight test boards in Appendix A is a breakthrough improvement based on the IPC-2221 test board that was launched 23 years ago.
The release of IPC-2221B marks the completion of all three important standards for printed circuit board design. Perry said: "We have created a three-game winning streak-the IPC-2222A rigid organic printed board design sub-standard was launched two years ago, and the IPC-2223C flexible printed PCB board design sub-standard was released one year ago. IPC- The release of 2221B marks the complete update of the IPC-2220 series of design standards."
The above is the introduction of the latest general standards for circuit design. Ipcb is also provided to PCB manufacturers and PCB manufacturing technology.
