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- 56.50+0.80 (+1.44%)2024/06/08 02:41 臺灣股市 已收盤 (報價延遲20分鐘)。
- 昨收55.70開盤56.00委買價56.50委賣價56.60
- 今日價格區間55.80 - 56.7052週價格區間16.60 - 76.00成交量11034 張平均成交量51685 張
- 市值42.350 億本益比 (最近12個月)72.44營運報告/法說會日期2024-08-06除權除息日-
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Silicon is a chemical element; it has symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic luster, and is a tetravalent metalloid and semiconductor. It is a member of group 14 in the periodic table: carbon is above it; and germanium, tin, lead, and flerovium are below it. It is relatively unreactive.
Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula SiO2, commonly found in nature as quartz. [5] [6] In many parts of the world, silica is the major constituent of sand. Silica is abundant as it comprises several minerals and synthetic products.
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Black silicon is a needle-shaped surface structure where needles are made of single-crystal silicon and have a height above 10 µm and diameter less than 1 µm. Its main feature is an increased absorption of incident light—the high reflectivity of the silicon, which is usually 20–30% for quasi-normal incidence, is reduced to about 5%. This is due to ...
The unusual optical characteristics, combined with the semiconducting properties of silicon make this material interesting for sensor applications. Potential applications include: 1. Image sensorswith increased sensitivity 2. Thermal imaging cameras 3. Photodetectorwith high-efficiency through increased absorption. 4. Mechanical contacts and interf...
Reactive-ion etching
In semiconductor technology, reactive-ion etching (RIE) is a standard procedure for producing trenches and holes with a depth of up to several hundred micrometres and very high aspect ratios. In Bosch process RIE, this is achieved by repeatedly switching between an etching and passivation. With cryogenic RIE, the low temperature and oxygen gas achieve this sidewall passivation by forming SiO2, easily removed from the bottom by directional ions. Both RIE methods can produce black silicon, but...
Mazur's method
In 1999, a Harvard University group led by Eric Mazur developed a process in which black silicon was produced by irradiating silicon with femtosecond laser pulses. After irradiation in the presence of a gas containing sulfur hexafluoride and other dopants, the surface of silicon develops a self-organized microscopic structure of micrometer-sized cones. The resulting material has many remarkable properties, such as absorption that extends to the infrared range, below the band gap of silicon, i...
Nanopores
When a mix of copper nitrate, phosphorous acid, hydrogen fluoride and water are applied to a silicon wafer, the phosphorous acid reduction reduces the copper ions to copper nanoparticles. The nanoparticlesattract electrons from the wafer's surface, oxidizing it and allowing the hydrogen fluoride to burn inverted pyramid-shaped nanopores into the silicon. The process produced pores as small as 590 nm that let through more than 99% of light.
When the material is biased by a small electric voltage, absorbed photons are able to excite dozens of electrons. The sensitivity of black silicon detectors is 100–500 times higher than that of untreated silicon (conventional silicon), in both the visible and infrared spectra. A group at the National Renewable Energy Laboratory reported black silic...
University of Wisconsin-Madison. "'Stealth' material hides hot objects from infrared eyes." ScienceDaily. www.sciencedaily.com/releases/2018/06/180622174752.htm(accessed 23 June 2018).New New York Times article (needs NYT subscription)[permanent dead link]Silicon monoxide is the chemical compound with the formula SiO where silicon is present in the oxidation state +2. In the vapour phase, it is a diatomic molecule. [1] . It has been detected in stellar objects [2] and has been described as the most common oxide of silicon in the universe. [3] Solid form.
Silicon Valley is a region in Northern California that is a global center for high technology and innovation. Located in the southern part of the San Francisco Bay Area, it corresponds roughly to the geographical area of the Santa Clara Valley.
Diatomaceous earth ( / ˌdaɪ.ətəˈmeɪʃəs / DY-ə-tə-MAY-shəs ), diatomite ( / daɪˈætəmaɪt / dy-AT-ə-myte ), celite or kieselgur / kieselguhr is a naturally occurring, soft, siliceous sedimentary rock that can be crumbled into a fine white to off-white powder.
The shell of Windows 1.0 is a program known as the MS-DOS Executive. Components included Calculator, Calendar, Cardfile, Clipboard Viewer, Clock, Control Panel, Notepad, Paint, Reversi, Terminal and Write. Windows 1.0 does not allow overlapping windows. Instead, all windows are tiled.
