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Silicon wafer Orientations

Silicon crystals are characterized by an orderly array of their atoms. In monocrystalline crystals, this arrangement is the same wherever the zone within the crystal.

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In order to provide reliable and qualitative products, Sil’tronix ST manufactures its own products totally internally throughout its factory between Mont Blanc and Geneva for more than 40 years.

To produce silicon wafers or silicon crystals from the pulling process, we observe the production flow below.

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We are now able to provide hybrid wafers i.e., a wafer substrate with one or several crystal thin films of quartz, PZT, lithium niobate, etc.

Processes based on crystal growth and on ion implantation have been developed to produce thin films. However, these technologies present some technological limits: all materials cannot be processed, obtaining thin films presenting the same properties as bulk materials is difficult and the layer thickness is limited to a few microns.

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Newsletter June

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In order to study the internal friction of thin films a nodal suspension system called GeNS (Gentle Nodal Suspension) has been developed. The key features of this system are: i) the possibility to use substrates easily available like silicon wafers; ii) extremely low excess losses coming from the suspension system which allows to measure Q factors in excess of 2x108 on 3” diameter wafers; iii) reproducibility of measurements within few percent on mechanical losses and 0.01% on resonant frequencies; iv) absence of clamping; v) the capability to operate at cryogenic temperatures. Measurements at cryogenic temperatures on SiO2 and at room temperature only on Ta2O5 films deposited on silicon are presented.

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The silicon wafers storage (or other materials) perfectly polished must be inventoried in controlled atmosphere area (Ideally in clean room) as soon as they are out from there double packaging sealed in clean room.

Actually, in uncontrolled atmosphere area, there are always a residual particulate contamination which changes depending the geographic situation.

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The Czochralski (Cz) Pulling process to achieve Silicon wafers and Silicon crystals

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Have a look to our newsletter of March !

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The field of applications for monocrystalline silicon are always more numerous. On side of classical fields such as microelectronics or micromechanics, new industries such as biotechnologies or watch makers use silicon wafers with different characteristics for different needs than standard wafers.

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Magnetic skyrmions are nanometer scale magnetic texture. They have recently been observed for the first time at room temperature in materials compatible with the electronics industry independently by two French team from CNRS in Grenoble and in Palaiseau. These results open a way for the use of skyrmions as nanoscale information carrier in computers.

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In the U.S., more than 100 food recalls were issued in 2017 because of contamination from harmful bacteria such as ListeriaSalmonella or E. coli. A new sensor design could one day make it easier to detect pathogens in food before products hit the supermarket shelves, thus preventing sometimes-deadly illnesses from contaminated food.

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A team of scientists from Lobachevsky University (Nizhny Novgorod, Russia) has obtained a material with a new structure for applications in next-generation optoelectronics and photonics. This material is one of the hexagonal modifications of silicon, which have better radiative properties compared to conventional cubic silicon, which is traditionally used in microelectronics.

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