Why Use Float Zone Silicon Wafers?

university wafer substrates

Why Float Zone Silicon? Facts that you need to know!


Soon we will be offering Float Zone Silicon that are only 5 micron thin! Please fill out the form if you want to be notified when we receive the new inventory.

Float zone Silicon or FZ is the purest form of silicon available. Thus it's much more expensive than silicon grown using the Czochralski method.

But even though FZ Si is more expensive it's still the least expensive Infrared material available. FZ Silicon provides better than 50% transmission in the 1.5 to 6 micron wavelength.

Float-zone silicon is typically used for high-efficiency solar panels, power devices and detector applications. It is highly transparent to terahertz radiation, and is usually used to fabricate optical components, such as lenses and windows, for terahertz applications.

One of the drawbacks of using Float Zone for Solar applications is the cost. But there is new technlogy that promises to slice Float Zone Silicon Ingot into 3 micron thin wafers! Currently an ingot has to be sawed. This wastes a lot of material.

The new service is kerfless, or no loss of material! Stay tuned for more information regarding this.

Get your FZ Si Quote FAST!

Float Zone Silicon Wafers for Infrared Spectroscopy Measurements

Researcher asked for the following:

I am trying to find Silicon wafers for a professor who wants to use them with Infrared Spectroscopy measurements. His requirements are: For IR I am having more trouble finding a suitable option. I have previously used lightly doped (Boron) double-side polished p-type Si substrates with resistivity >3000 Ω cm. I think I can get away with resistivity >1000 Ω cm. They must be double-side polished. Dopant and type are less important (n or p-type is fine with any dopant). Thickness around 500 micron would be good. Diameter above 100 mm preferred but I can be flexible. I would like to get as inexpensive as possible but without any quality issues (no scratches, hazy, particle, or sold “as is”). About 25 wafers would be good depending on pricing. In stock wafers would be important unless the wait is 2 weeks or less. Does University Wafers have anything that might meet these requirements and what would the pricing be for 25 wafers?

UniversityWafer Quoted and Client Purchased:

Thickness around 500 micron would be good. Diameter  100 mm double-side polished resistivity >1000 Ω cm

 Exw price $Price depends on quantity. Please contact us!

Float Zone (FZ) Silicon Wafer Facts

If you are looking for the best type of wafer you need for your next project, then you need to look at FZ wafers. The superior properties they bring are highlighted in many applications and are therefore described as a good alternative to CZ wafers. According to a recent study by the Institute of Electrical and Computer Engineers (IEC) at the University of California, San Diego, it is recommended to use an F Z wafer. They have been popular on the market for many years due to their high performance and low cost.

FZ wafers are said to have a vertical melting process through which pure silicon flows. Pfann has developed a method to avoid contamination of silicon.

The presence of light and impurities such as nitrogen improves the mechanical performance of the wafer and also helps to control micro-defects in FRP wafers, which is why they are deliberately added during the growth phase. When pollutants such as carbon and oxygen are present on a FZW, they can make it difficult for the device to function. Although the size of an FZ wafer is smaller than 150 mm, there is a range of surface tension that is not restricted, especially in the development phase, as many different silicon and other materials are available for use on the wafer.

FZ wafers are extremely transparent to radiation such as terahertz, making them a compact wafer specifically designed for use in high-power, low-energy and low-power applications. They are also suitable for high-performance, high-performance and high-energy applications, as well as for a wide range of applications in electronics, medical technology and medical technology.

FZ wafers are considered an expensive component, but are still the cheapest infrared material available. Until 50 years after its abolition, vacuum tubes were the best alternative, then they were replaced by integrated circuits that formed the basis for the new generation of computers that are still in use today. They are also the ones with the lifetime of the integrated circuit, as they have been the main components in the development of new generation computers since the early 1990s.

It should also be noted that they are highly transparent for terahertz radiation, which is why they are normally used for radio frequency communication such as radio frequency communication (RF). On the other hand, floating zone-wide silicon is a widely used but less transparent material for infrared radiation. Its advantages include the ability to transmit up to 50 wavelengths at measurements of 1.5 - 6 micrometers, as well as its high thermal conductivity.

Below are just some of the Float Zone Silicon Wafers that we have available:

FZ Si Dia Type/Dopant Orientation Resistivity
Polish Thickess (Microns) Comments
25.4mm Undoped (100) >2,000 SSP 280 Intrinsic Float Zone
50.8mm N/Ph (111) >200 SSP 200 2 FLats back-side Alkaline etched
76.2mm Undoped (100) >5,000 SSP 500 Undoped Float Zone
100mm P/B (111) 40-60 SSP 255 Buy as few as one
150mm Undoped (100) >10,000 DSP 650um Hard to Find
200mm Undoped (100) >1,000 SSP 725um FZ SI TTV <6um, Bow <10um,Warp<25um