How to use tin whisker in a sentence? Find typical usage patterns (collocations)/phrases/context for "tin whisker" and check conjugation/comparative form for "tin whisker". Mastering all the usages of "tin whisker" from sentence examples published by news publications.
Tin whiskers often cause failures in relays, and have been found upon examination of failed relays in nuclear power facilities. Pacemakers have been recalled due to tin whiskers. Research has also identified a particular failure mode for tin whiskers in vacuum (such as in space), where in high-power components a short-circuiting tin whisker is ionized into a plasma that is capable of conducting hundreds of amperes of current, massively increasing the damaging effect of the short circuit. The possible increase in the use of pure tin in electronics due to the RoHS directive drove JEDEC and IPC to release a tin whisker acceptance testing standard and mitigation practices guideline intended to help manufacturers reduce the risk of tin whiskers in lead-free products.
|
|
On April 17, 2005, the Millstone Nuclear Power Plant in Connecticut was shut down due to a "false alarm" that indicated an unsafe pressure drop in the reactor's steam system when the steam pressure was actually nominal. The false alarm was caused by a tin whisker that short circuited the logic board that was responsible for monitoring the steam pressure lines in the power plant.
|
|
The backup control processor had suffered a previously undetected anomaly, and PanAmSat was not able to regain control of the spacecraft. Galaxy IV was declared a loss on May 20, 1998. Failure of the primary control processor was attributed to tin whisker growth, a phenomenon in which tendrils grow from solder, causing an electrical short circuit. Engineers believe that a hole developed in the conformal wax coating over the solder, allowing whiskers to develop.
|
|
Fortunately, experience thus far suggests deployed instances of RoHS compliant products are not failing due to whisker growth. Dr. Ronald Lasky of Dartmouth College reports: "RoHS has been in force for more than 15 months now, and ~$400B RoHS-compliant products have been produced. With all of these products in the field, no significant numbers of tin whisker-related failures have been reported." Whisker growth occurs slowly over time, is unpredictable, and not fully understood, so time may be the only true test of these efforts.
|
|
The first product launched was the RP10 Herald. In common with many of their 1960s designs, this was built into a wooden case covered in leathercloth, with foam padding under the front and rear panels and a turntable to enable the set to be rotated for best reception (the internal ferrite rod aerial being highly directional). It featured a large (5 inch by 8 inch) 30Ω loudspeaker, and was powered by two PP9 batteries. Initial sets used Ediswan transistors; later sets used Mullard devices, including the AF117, which unfortunately went on to suffer from tin whisker formation within the encapsulation.
|
|
Tin is also widely used in the electronics industry because of its ability to protect the base metal from oxidation thus preserving its solderability. In electronic applications, 3% to 7% lead may be added to improve solderability and to prevent the growth of metallic "whiskers" in compression stressed deposits, which would otherwise cause electrical shorting. However, RoHS (Restriction of Hazardous Substances) regulations enacted beginning in 2006 require that no lead be added intentionally and that the maximum percentage not exceed 1%. Some exemptions have been issued to RoHS requirements in critical electronics applications due to failures which are known to have occurred as a result of tin whisker formation.
|
|
No results under this filter, show 6 sentences.