IPC-SM-840 is the industry standard titled “Qualification and Performance of Permanent Solder Mask.” Developed by IPC (Association Connecting Electronics Industries), this document establishes the criteria for the qualification and quality conformance of permanent solder mask materials.
The standard, titled "Qualification and Performance Specification of Permanent Solder Mask," is the definitive industry benchmark for the materials used to insulate and protect printed circuit boards (PCBs). For engineers, manufacturers, and quality assurance professionals, accessing the IPC-SM-840 PDF is essential for ensuring that solder mask coatings meet rigorous reliability requirements. What is IPC-SM-840?
: According to the standard, the solder mask layer should typically provide a dielectric strength of at least 500V to prevent short circuits and leakage currents. ipc-sm-840 pdf
Facilitates finer pitch designs and high-density packaging (BGA/SMT).
Legally, no. IPC is a membership organization that relies on standard sales to fund its research. The only legal copies are purchased from IPC, Techstreet, or ANSI. What is IPC-SM-840
Keep in mind that standards are subject to revision, and it's essential to ensure you're referencing the most recent version.
IPC-SM-840 is a standard published by the Institute for Printed Circuits (IPC), now known as the IPC - Association Connecting Electronics Industries. The standard specifically focuses on "Requirements for Solder Mask". Legally, no
No. IPC-SM-840 focuses purely on performance (adhesion, insulation, thermal resistance). Color is a cosmetic specification usually handled by the IPC-4761 or the drawing notes. However, note that white and black solder masks often have different material properties than green; the standard applies universally.
When you open the IPC-SM-840 document, you will encounter a series of rigorous test methods. Understanding these sections is vital for anyone qualifying a PCB fabrication shop.