100% (Test method GB-T7753-87) Storage Details Store under normal conditions of 10° to 30°C and 40 to70% R.H. in their initial packaging. Shelf life is 6 months from the date of
Technical Library | 2021-01-28 01:55:00.0
Printed circuit board surface finishes are a topic of constant discussion as environmental influences, such as the Restriction of Hazardous Substances (RoHS) Directive or technology challenges, such as flip chip and 01005 passive components, initiate technology changes. These factors drive the need for greater control of processing characteristics like coplanarity and solderability, which influence the selection of surface finishes and impact costs as well as process robustness and integrity. The ideal printed circuit board finish would have good solderability, long shelf life, ease of fabrication/processing, robust environmental performance and provide dual soldering/wirebonding capabilities; unfortunately no single industry surface finish possesses all of these traits. The selection of a printed circuit board surface finish is ultimately a series of compromises for a given application.
Technical Library | 2022-03-02 21:26:51.0
The solderability of a nickel-palladium-gold (Ni-Pd-Au) finish on a Cu substrate was evaluated for the Pb-free solder, 95.5Sn-3.9Ag-0.6 Cu (wt.%, abbreviated Sn-Ag-Cu) and the eutectic 63Sn-37 Pb (Sn-Pb) alloy. The solder temperature was 245ºC. The flux was a rosin-based mildly activated (RMA) solution. The Ni-Pd-Au finish was tested in the as-fabricated condition as well as after exposure to one of the following accelerated storage (shelf life) regiments: (1) 33.6, 67.2, or 336 hours in the Battelle Class 2 flowing gas environment or (2) 5, 16, or 24 hours of steam aging (88ºC, 90%RH).
Technical Library | 2024-06-19 15:23:54.0
Each year the semiconductor industry routes a significant volume of devices to recycling sites for no reliability or quality rationale beyond the fact that those devices were stored on a warehouse shelf for two years. This study identifies the key risks attributed to extended storage of devices in uncontrolled indoor environments and the risk mitigation required to permit safe shelf-life extension. Component reliability was evaluated after extended storage to assure component solderability, MSL stability and die surface integrity. Packing materials were evaluated for customer use parameters as well as structural integrity and ESD properties. Results show that current packaging material (mold compound and leadframe) is sufficiently robust to protect the active integrated circuits for many decades and permit standard reflow solder assembly beyond 15 years. Standard packing materials (bags, desiccant, and humidity cards) are robust for a 32 month storage period that can be extended by repacking with fresh materials. Packing materials designed for long term storage are effective for more than five years.
We can help you eliminate rust, tarnish, corrosion, poor wetting and add years to your components or PC boards shelf-life. Dasal Technical Products, Inc. markets and distributes a state-of-the-art technology for the preservation and protection of met
We can help you elimante rust, tarnish, corrosion, poor wetting and years to your components and PC boards shelf-life. Dasal Technical Products, Inc. markets and distributes a state-of-the-art technology for the preservation and protection of metals.
Tape KD851/852 is a polyimide film-backed silicone adhesive tape with high temperature resistant. Application Mask for printed circuit boards during wave solder or solder dip process. Features：KD851 Total Tape T
New Equipment | Solder Materials
8 hrs. @ 30–45% RH & 22–25°C ~6 hrs. @ 45–70% RH & 22–25°C Stencil Cleaning Automated stencil cleaning systems for both stencil and misprinted boards. Manual cleaning using 99% isopropyl alcohol (IPA) works well. Storage and Handling Proce
New Equipment | Solder Materials
Kapp Lunar Flux™ is a white paste for the high temperature soldering of Aluminum and Zinc die cast alloy. It is a reaction-type flux with 70% active ingredients dispersed in alcohol. Kapp Lunar Flux™ has considerable shelf life stability, as the susp
Don't Sacrifice PCBs for Profiling Double Sided Thermally Conductive Tape Used for Attaching Thermocouples to PCBS. Non-destructive TC attachment Reliable TC readings No waiting for curing or soldering Fast, easy setup Sold in 1
