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%ما هو (من)٪ 1 - تعريف
A SEMICONDUCTOR PRODUCT PACKAGING AND TEST SERVICES PROVIDER
Amkor Technology, Inc.; Amkor; Amkor Technology Inc
Platinum group
![Replica of the [[NIST]] national prototype kilogram standard, made in 90% platinum - 10% iridium alloy](https://commons.wikimedia.org/wiki/Special:FilePath/National prototype kilogram K20 replica.jpg?width=200 "Replica of the [[NIST]] national prototype kilogram standard, made in 90% platinum - 10% iridium alloy")
SIX NOBLE, PRECIOUS METALLIC ELEMENTS CLUSTERED TOGETHER IN THE PERIODIC TABLE: RUTHENIUM, RHODIUM, PALLADIUM, OSMIUM, IRIDIUM, AND PLATINUM
Platinum family; Platinum Series; Platinum group metals; Platinum metals; Platinum group metal; Platinide; Platinum group elements; Platinoid; Platinum-group metal; Platinum-group metals; PGMs; Platinum-group
The platinum-group metals (abbreviated as the PGMs; alternatively, the platinoids, platinides, platidises, platinum group, platinum metals, platinum family or platinum-group elements (PGEs)) are six noble, precious metallic elements clustered together in the periodic table. These elements are all transition metals in the d-block (groups 8, 9, and 10, periods 5 and 6).
platinum metals
SIX NOBLE, PRECIOUS METALLIC ELEMENTS CLUSTERED TOGETHER IN THE PERIODIC TABLE: RUTHENIUM, RHODIUM, PALLADIUM, OSMIUM, IRIDIUM, AND PLATINUM
Platinum family; Platinum Series; Platinum group metals; Platinum metals; Platinum group metal; Platinide; Platinum group elements; Platinoid; Platinum-group metal; Platinum-group metals; PGMs; Platinum-group
¦ plural noun Chemistry the six metals platinum, palladium, ruthenium, osmium, rhodium, and iridium, which have similar properties and tend to occur together in nature.
Platinoid
SIX NOBLE, PRECIOUS METALLIC ELEMENTS CLUSTERED TOGETHER IN THE PERIODIC TABLE: RUTHENIUM, RHODIUM, PALLADIUM, OSMIUM, IRIDIUM, AND PLATINUM
Platinum family; Platinum Series; Platinum group metals; Platinum metals; Platinum group metal; Platinide; Platinum group elements; Platinoid; Platinum-group metal; Platinum-group metals; PGMs; Platinum-group
An alloy of copper, nickel, zinc in the proportions of German silver
with 1 or 2 per cent of tungsten. It is used for resistances. It has a
specific resistance (or resistance per centimeter cube) of about 34
microhms. Its percentage variation in resistance per degree C.
(1.8° F.)
is only about .021 per cent., or less than half that of German silver.
This is its most valuable feature.
ويكيبيديا
Amkor Technology
Amkor Technology, Inc. is a semiconductor product packaging and test services provider. The company has been headquartered in Tempe, Arizona, since 2005, when it was moved from West Chester, Pennsylvania. The company was founded in 1968 and, as of 2022, has approximately 31,000 employees worldwide and a reported $7.1 billion in sales.
With factories in China, Japan, Korea, Malaysia, Philippines, Portugal, Taiwan and Vietnam, Amkor is a leading player in the semiconductor industry. It designs, packages and tests integrated circuits (ICs) for chip manufacturers.
