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2. List of semiconductor materials - Wikipedia

   en.wikipedia.org/wiki/List_of_semiconductor...

   A compound semiconductor is a semiconductor compound composed of chemical elements of at least two different species. These semiconductors form for example in periodic table groups 13–15 (old groups III–V), for example of elements from the Boron group (old group III, boron, aluminium, gallium, indium) and from group 15 (old group V, nitrogen, phosphorus, arsenic, antimony, bismuth).

3. Tanaka Kikinzoku - Wikipedia

   en.wikipedia.org/wiki/Tanaka_Kikinzoku

   The Tanaka Kikinzoku Group, founded in 1885, is a Japanese manufacturer of precious metals materials focusing mainly on products for the electronics, semiconductor and automotive industries. [2] Tanaka's European subsidiary is Tanaka Kikinzoku International (Europe) GmbH in Frankfurt , Germany and its US subsidiary is Tanaka Kikinzoku ...

4. Ingot - Wikipedia

   en.wikipedia.org/wiki/Ingot

   Non-metallic and semiconductor materials prepared in bulk form may also be referred to as ingots, particularly when cast by mold based methods. [2] Precious metal ingots can be used as currency (with or without being processed into other shapes), or as a currency reserve, as with gold bars .

5. Germanium - Wikipedia

   en.wikipedia.org/wiki/Germanium

   Germanium is a semiconductor having an indirect bandgap, as is crystalline silicon. Zone refining techniques have led to the production of crystalline germanium for semiconductors that has an impurity of only one part in 10 10 , [ 37 ] making it one of the purest materials ever obtained. [ 38 ]

6. Platinum–iridium alloy - Wikipedia

   en.wikipedia.org/wiki/Platinum–iridium_alloy

   Platinum–iridium alloys are alloys of the platinum group precious metals platinum and iridium. Typical alloy proportions are 90:10 or 70:30 (Pt:Ir). These have the chemical stability of platinum, but increased hardness. The Vickers hardness of pure platinum is 56 HV while platinum with 50% of iridium can reach over 500 HV.

7. Precious metal - Wikipedia

   en.wikipedia.org/wiki/Precious_metal

   The best known precious metals are the precious coinage metals, which are gold and silver. Although both have industrial uses, they are better known for their uses in art , jewelry , and coinage. Other precious metals include the platinum group metals: ruthenium , rhodium , palladium , osmium , iridium , and platinum , of which platinum is the ...