Typical Client Question regarding p-type silicon wafers:
Below is a typical interaction with a research client. Let us know how we can help you.
After looking at your online store, I think we might go with your cheapest silicon wafers, product D 444. I am in a group that is working on a Senior Design Project to create a biobattery. We need a substrate to pattern with photolithography and subsequently deposit various precious metals on that will catalyze certain reactions and conduct electricity. If you have any advice on specific types of wafers we will need for such nano electronic devices I would be happy to know. Thanks.
UniversityWafer, Inc. Reply:
We make nanomaterials in our lab and one approach is using electrical explosion of wires (EEW). We used one of Scott's old Si wafers (doped with B) and broke off a strip of Si that we attached to electrodes in our EEW apparatus. It worked nicely and we are looking to do the same thing with Ge (Germanium Wafer). We need a wafer that is less than 500 microns thick. Fill out the form and receive an immediate quote.
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P-type Si Wafer in Hard Plastic Cassette
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High Resistivity P-Type Silicon Wafers for Sensor Fabrication
Research scientists have used the following specs to fabricate sensors in a cleanroom environment.
100mm P/Boron (100) 3000-4000 ohm-cm 500+/-15um SSP PRIME
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P-Type Silicon Wafer Applications
P-type silicon wafers for use in high performance, energy efficient and energy efficient applications such as solar cells and solar cells.
P-type wafers are heavily doped with 111 materials used in research and development lithography and are therefore not suitable for SEM analysis. P wafers can have an epi substrate, which is normally used for bipolar devices such as solar cells, solar cells and solar modules. Note: It is not recommended to use Epi substrates normally, as these pieces are shaped like cakes and the 111 materials are therefore not ideal for use in high-performance silicon cells.
Where Can I Find Diffusion Doped P on N PV-Silicon Wafers?
A scientist asked us to quote the following:
I need a diffusion doped “p on n Si” wafers. Can you please provide me detail on this?
Can you please list out available such PVs with specifications? I don’t need a lot. Probably within 10 or may be higher.
Also, do you have GaInP PV cells? Can you provide me details?
Can you please let me know if you have any other doping profile which can provide better performance?
Also, can you provide rough estimation of price for the same size and depth as you had attached in last email.
UniversityWafer, Inc. Quoted:
We have a facility to make the diffusion and create p on n PV-Si wafers. I attach the photos of the wafers after the process. Boron element (p-type) we can diffuse into the depth from 0.5 µm to maximum ~3µm. The most common depth is about 1µm. Concentrations that are available are up to ~5E19/cm³. Typically 0.5-1E19 /cm³. After the diffusion we remove the appearing oxides. Process temperature is approximately 1000-1100° C. Adequate substrates (n-type, Phos. doped) we have too. Please let me know what you need in more detail and we return with the quote.
Better performance you achieve using higher concentrations. We offer:
Item Qty. Description
10 Silicon wafers, per SEMI Prime, P/E 4"Ø×525±25µm,
p-type Si:B, Ro=(5-10)Ohmcm,
TTV<10µm, Bow<40µm, Warp<40µm,
One-side-polished, back-side Alkaline etched,
With Diffused Phosphorus layer ~500nm thick, Nc~5E19/cm³, Ro~0.001 Ohmcm,
SEMI Flats (two),
Sealed in Empak or equivalent cassette.
Price: $Please contact us for pricing
Please see a photo of the wafer after the diffusion process. This is how the surface looks.
HF etched p-type Silicon Wafers (to Remove SiO2)
A researcher asks:
Can you provide HF etched p-type Si wafers (to remove SiO2), so that we don't have to go the rather scary procedure to do it here. Once a Si waver is HF ezched, how long can one keep it before it oxidizes again?
The other specs would be p-type Silicon, cut (100), ca. 1 Ohm cm, dia 1", thickness 500um (but is not critical), 10 pcs.
UniversityWafer, Inc. Replied:
All wafers we offer are HF-etched and cleaned before sale. However they oxidize and passivate very quickly. If you need to use bare Si cleaning prior use is inevitable.
Please ask which wafers we quoted.