Float-zone (FZ) silicon wafers also called undoped or intrinsic are used in applications that require purity that is much higher than Czochralski (CZ) grown silicon.
We have a large selection in stock, but we can customize any order in small and large quantities.
Researchers use the following silicon specs to fabricate Schottky barrier and heterojunction diodes:
100mm NTD FZ wafer Resistivity: 10 Ohm-mm Orientation: <111>
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Silicon wafers, especially those very high resistivity, are transparent to IR. I attach article in pdf format, providing many details on the si transparency subject. If you need silicon which is less IR transparent, we recommend using highly doped CZ wafers.
Item Qty. Description
GP15. 50/100 Silicon wafers, per SEMI Prime, P/P 4"Ø×380±5µm,
FZ Intrinsic undoped Si:-±0.5°, Ro > 20,000 Ohmcm,
Both-sides-polished, SEMI Flat (one),
Sealed in Empak or equivalent cassette,
Please let us know and we return with the offer.
When researchers need the higher purity Silicon, they use FZ Silicon substrates instead of Czochralski grown silicon.
Or simply put, Float Zone Si is most ly used low volume applications that require high-efficiency while CZ Silicon is used for high volume, less expensive applications.
Below are just some of the Float Zone wafers that we have in stock.
25.4mm Intrinsic (100) >2,000 ohm-cm SSP 280 micron
50.8mm N-Type Phosphorous Float Zone (FZ) (111) >200 ohm-cm SSP 200um
76.2mm Undoped (100) >5,000 ohm-cm SSP 500um
100mm, 150mm and 200umm Undoped Silicon Wafers in stock. All orientations, resistivities and other specs in stock.