IPC-4922 : 2024

1 SCOPE

This standard prescribes general minimum requirements for the classification and testing of sintering materials for reliable electrical and thermal interconnects. This standard is a sintering materials classification, quality assurance and procurement document for sintering materials.

1.1 Purpose

This standard defines the characteristics of sintering materials through the definitions of properties and

specifications of test methods and inspection criteria. The materials include both:

1) Fluid and semifluid paste and ink materials (in this section collectively designated “pastes”) made from a combination of solid metal particles combined with a continuous phase of material designated an “organic carrier vehicle” (OCV). The OCV may or may not contain dissolved or dispersed organometallics (OMC) or similar materials, and a broad means of their characterization is within the scope of this document.

2) Solid and semi-solid predried preforms and films (hereinafter collectively designated “preforms”) of various shapes and sizes.

Detailed OCV characterization remains out of the scope of this standard, since the OCV itself will not be used as a material separate from the sintering paste. However, cleanliness remains within the scope of the standard and shall be addressed as agreed between user and supplier (AABUS) concerning the determination of the residues after sintering, characterization of the same and cleaning processes.

The requirements for sintering materials are defined in general terms. In practice, where more stringent requirements are necessary, additional requirements shall be as agreed between user and supplier (AABUS).

The standard is explicitly not designed to cover liquid phase or transient liquid phase materials or their associated principles, methodologies, and techniques, as their joint formation mechanism is not by sintering.