• Alloy: Sn63/Pb37
• Type 4 powder (89.5 percent metal load)
• Quantity: 500g jar
• Provides consistent performance after room temperature or cold storage, and throughout the assembly process
• Halogen-free per EN14582 test method

Indium 8.9HF

Indium8.9HF is an air reflow, no-clean solder paste specifically formulated to accommodate the higher processing temperatures required by the SnAgCu, SnAg, and other alloy systems favored by the electronics industry to replace conventional Pb-bearing solders. Indium8.9HF offers unprecedented stencil print transfer efficiency to work in the broadest range of processes. In addition, the high probe testability of Indium8.9HF minimizes false failures in ICT. It is one of our lowest voiding pastes.

Complementary Products

• Rework Flux: TACFlux 089HF, TACFlux 020B-RC
• Cored Wire: CW-807, Core 230-RC
• Wave Flux: WF-9945, WF-9958

Avoid the Void

Avoid shortened product life; avoid field failures; avoid customer dissatisfaction, plus a whole lot more with Indium Corporation’s advanced solder paste technology.

Indium Corporation’s suite of solder pastes offers formulations designed to deliver low-voiding, plus enhanced benefits such as improved response-to-pause, stability, HiP minimization, reliable in-circuit testing, and enhanced SIR performance.

Indium8.9HF Solder Paste provides consistent performance after room temperature or cold storage, and throughout the assembly process.

Refrigerated storage will prolong the shelf life of solder paste. Solder paste packaged in cartridges should be stored tip down.

Solder paste should be allowed to reach ambient working temperature prior to use. Generally, paste should be removed from refrigeration at least 2 hours before use. Actual time to reach thermal equilibrium will vary with container size. Paste temperature should be verified before use. Jars and cartridges should be labeled with date and time of opening.

Printing

Stencil Design:

Electroformed and laser cut/electropolished stencils produce the best printing characteristics among stencil types. Stencil aperture design is a crucial step in optimizing the print process. The following are a few general recommendations:

•  Discrete components—A 10–20% reduction of stencil aperture has significantly reduced or eliminated the occurrence of mid-chip solder beads. The “home plate” design is a common method for achieving this reduction.
•  Fine-pitch components—A surface area reduction is recommended for apertures of 20mil pitch and finer. This reduction will help minimize solder balling and bridging that can lead to electrical shorts. The amount of reduction necessary is process-dependent (5–15% is common).
•  For optimum transfer efficiency and release of the solder paste from the stencil apertures, industry standard aperture and aspect ratios should be adhered to.

Cleaning

Indium8.9HF is designed for no-clean applications; however, the flux can be removed, if necessary, by using a commercially available flux residue remover.

Stencil cleaning is best performed using isopropyl alcohol (IPA) as a solvent. Most commercially available non-water-based stencil cleaners work well.