What SIMOX SOI Wafer Specs are used to fabricate devices?

For devices like single electron transistors, a highly n-doped device layer is often required. Our SIMOX SOI (Part 2551) is a common choice for these applications.

Do you sell partial silicon wafer cassettes?

Yes, we have a large inventory of high-quality partial Silicon Wafer cassettes. You can buy as few as one wafer instead of a full cassette of 25.

Silicon Wafers and Semiconductor Substrates for Research & Development

Serving researchers, universities, and the semiconductor industry since 1997. No minimum order quantity.

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Below Are Just Some of the Substrates You Can Buy As Few as ONE Online!

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"Provides the best service to university researchers as well as companies in the semiconductor industry. High-Quality, low cost and small quantities make UniversityWafer stand out from the competition."

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"Unexpectedly, I found UniversityWafer, Inc. in internet and asked for solutions on my problems requesting silicon wafers. The response immediately came and was accompanied with a general quotation. Once my problems were resolved. I keep in touch as a partner of my research."

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"I needed to request refractive index (RI) on one of the products they replied and they responded quickly and accurately with the information I was looking for."

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"Always great to work with the folks at University Wafer! Now with their online shop it's even easier too. The company is friendly, prompt, and reliable. We've been purchasing from them for years and our labs appreciate them and their products. Thanks :)"

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"We were just starting to buy plain silicon for our research. University Wafer turned out to be great - customer service, response speed, ease of placing order. UPDATE: It is a hard-to-please business IMHO, so ignoring baseless criticism becomes important."

Reliable Solutions

"University Wafer provides researchers with a reliable and efficient solution for all their substrate needs. With an extensive inventory of high-quality silicon wafers and substrates. We offer a wide range of materials and specifications to meet the diverse requirements of research applications."

Let UniversityWafer, Inc. Be Your Partner In Success!

DOE Researcher Testimonial - SO39212

"I really do appreciate working with you all. I order from a lot of places, and by far, you all are one of the best I order from! Thank you!"

— We have the highest-quality silicon wafers in stock and ready to ship.

"We answer the toughest questions for small volumes and large and are trusted across the world for our customer service. Student researchers have used our glass, sapphire, silicon, III-V and II-VI wafers to make devices including PN Junctions and Solar Cells."

You can buy as few as one wafer!

NEWS: Photonic Structures

"Researchers at Stanford University have used UniversityWafer, Inc. 100mm Silicon Item #783 to fabricate photonic structures that control solar absorption & thermal emissions potentially saving energy costs. Compare our prices and save!"

In Stock

We Have A Large Selection of Ultra-Flat Silicon Wafers With Total Thickness Variation (TTV) < 1 Micron!

Maximize your lithographic precision and bonding yields with our ultra-flat silicon wafers, engineered with a tight 1-micron Total Thickness Variation (TTV) to meet the rigorous demands of advanced MEMS, SOI, and semiconductor device fabrication.

We Have Extra-Thick Silicon Wafers Up to 10mm

Engineer superior infrared lenses and ultra-stable neutron filters with our extra-thick silicon substrates, available up to 10mm to provide the exceptional structural integrity and optical path length your high-energy applications require.

Thermal Oxide Dry and Wet Up to 15 µm

Accelerate your prototyping with our ready-to-ship silicon wafers featuring precise thermal oxide coatings from 100 nm dry to 15 µm wet, eliminating the long lead times of custom furnace runs.

Ultra-Thin Silicon Wafers

Push the physical limits of semiconductor design with our ultra-thin silicon wafers, precisely thinned and polished to your exact specs to enable breakthrough research in MEMS, optoelectronics, and flexible displays.

150mm Silicon Wafer Sale

Factory sealed, silver wrapped, cassette packs.

P/Boron Material: $11.90/wafer
Other Materials: $6.90/wafer
Dummy Wafers: $4.90/wafer

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Other Substrates And Services That We Provide

Sputtered Thin Films

Conductive Metals
Aluminum Alloys
Adhesion Metals
Refractory Metals
Platinum Group Metals
Magnetic Metals
Non-Magnetic Alloys
Other Alloys
Semiconductors
Nitrides
Oxides
TCO
Carbon, Carbide
Silicides
Chalcogenide

Evaporated Thin Films

Conductive Metals
Adhesion Metals
Refractory Metals
Platinum Group Metals
Magnetic Metals
Non-Magnetic Alloy
Soft Metals
Semiconductors
Oxides
TCO
Fluorides

Silicon-on-Insulator & SiC Wafer Inventory Buy Online!

SIMOX SOI Wafer Inventory

Device Layer (nm)	Box Layer (nm)	Handle Layer (um)	TTV (um)	Qty
55	145	725+/-15	<1	184
70	2000	725+/-15	<1	1756
145	1000	725+/-15	<1	9166
3000	300	725+/-15	<1	4414

*Selection of available inventory. Contact us for full list.

Silicon Carbide That's Made in USA!

4H-1440 n+ Silicon Carbide Wafer
100mm diameter, 4° off-axis

Product metric	Units	Prime Standard	Test Grade
Crystal Characteristics
Polytype		4H	4H
Doping Type		n-type	n-type
Dopant		Nitrogen	Nitrogen
Surface Orientation	degrees	3.8 - 4.2	–
Wafer Mechanical Characteristics
Diameter	mm	99.7 - 100	99.5 - 100
Thickness	μm	330 - 370	325 - 375
Primary Flat Position	degree	± 1	± 1
Primary Flat Length	mm	31.5 - 34	30.5 - 34.5
Secondary Flat Position	mm	± 5	± 5
Secondary Flat Length	mm	17.5 - 19.5	16 - 20
Bow	μm	± 20	R
Warp	μm	≤ 30	R
Total Thickness Variation (TTV)	μm	≤ 5	R
Local Thickness Variation (SBIR)	μm	≤ 2	R
Substrate Quality
Resistivity	ohm-cm	0.014 - 0.024	0.010 - 0.030
Foreign Polytypes	%	0	≤ 15
Defects (TUA)¹	%	≥ 95	nr
Dislocation Distribution² (EPD)	cm^-2	≤ 12,000	nr
TED	cm^-2	≤ 9,000	nr
TSD	cm^-2	≤ 1,000	nr
BPD	cm^-2	≤ 2,000	nr
MPD	cm^-2	≤ 0.5	nr

Surface and crystal imperfections	cm^-2	≤ 1	na
Hex Plates	%	0	nr
Visual Carbon Inclusion	% area	< 0.05	nr
Visual Edge Inclusions	number	0	nr
Visible Scratches	mm	< 15	nr
Edge Chips and Indents	number	0	Yes; not quantified
Cracks	number	0	0
Pinholes	number	0	Yes; not quantified
Pits	number	< 5	nr
Surface Quality
Silicon face finish³	nm	< 0.5	Mirror
Carbon face finish³	nm	≤ 5	Mirror
Metal Contamination⁴ (Al, Cr, Fe, Ni, Cu, Zn, Hg, Na*, K, Ti, Ca & Mg)	atoms/cm²	≤ 1e+11 (except LDL for Al & Na as noted)	R
Contamination	%	None	R
Particle Contamination	number
Packaging & Misc
Lasermark		–	–
Packaging		Multi-wafer cassette (single wafer coin container upon request for orders < 3 wafers)	Multi-wafer cassette
C of A		Yes	Yes
Data Package		Yes	–

Legend: R = reported, but specification not; nr = data not reported; na = not applicable

¹ Total useable area calculation includes Candela measurements for surface defects and micropipes to determine an accurate "% useable area calculation". Inspection area on a 2 x 2 mm grid with 3 mm EE.
² Dislocation distribution is determined by KOH etching using a 69 point radial measurement technique on 1 wafer per boule.
³ Not 100% inspected. AFM-RMS warranted using value from 10 x 10 μm scan site.
⁴ TXRF LDL for Al and Na is ≤ 5e+11. * denote Al and Na with lower detection limit.

Research Applications

Ultra-Thin Silicon Wafers: Used for PVD coating and flexible electronics. Available as thin as 2 microns.

100mm (4 inch) Wafers: The standard for university labs. Available in Float Zone (FZ) and Czochralski (Cz).

Float Zone (FZ) Wafers: High resistivity, ideal for solar cell processing and surface passivation studies.

Nanosheets Research: PbS NS-based photoconductor devices on silicon substrates. Read Paper
Microfluidics: Scalable microfluidics for single-cell RNA printing using 4-inch silicon test wafers.
Atomic Layer Deposition (ALD): PbI2 Thin Films using Sapphire wafers and ITO glass.
Graphene Research: Remote nongenetic optical modulation using fused silica wafers.

Silicon Wafers and Semiconductor Substrates for Research & Development

Below Are Just Some of the Substrates You Can Buy As Few as ONE Online!

Reliable Solutions

Let UniversityWafer, Inc. Be Your Partner In Success!

DOE Researcher Testimonial - SO39212

NEWS: Photonic Structures

We Have A Large Selection of Ultra-Flat Silicon Wafers With Total Thickness Variation (TTV) < 1 Micron!

We Have Extra-Thick Silicon Wafers Up to 10mm

Thermal Oxide Dry and Wet Up to 15 µm

Ultra-Thin Silicon Wafers

150mm Silicon Wafer Sale

Sputtered Thin Films

Evaporated Thin Films

Silicon-on-Insulator & SiC Wafer Inventory Buy Online!

SIMOX SOI Wafer Inventory

Silicon Carbide That's Made in USA!

4H-1440 n+ Silicon Carbide Wafer100mm diameter, 4° off-axis

Research Applications

UniversityWafer, Inc. is cited in over 20,000 research papers

Researchers' Trusted Silicon Wafer Manufacturer Since 1997

4H-1440 n+ Silicon Carbide Wafer
100mm diameter, 4° off-axis