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Vegeta
Joined: 13 Apr 2013
Posts: 7049
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 Posted: Tue Feb 15, 2022 10:55 am Post subject: Vegeta February 2022 03 Soviet single-crystal silicon ingot |
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You can shipping worldwide $10 < 250g, $15 < 500g, $24 < 1kg, $38 < 2kg; AVICC as cost, or postpone until the next sales.
Payment with PayPal or ChipPay by AVICC.
SOLD Soviet KDB08-60 group 3A5mk single-crystal silicon ingot with hole electrical conductivity doped with boron, dimensions 60x143mm, weight 945g; - $55 sebskyman
K - Silicon
D - hole electrical conductivity
B - doped with boron
08 - resistivity, Ohm*cm
60 - diameter, mm
quality photos available:
https://i.ibb.co/2c7XMBz/IMG-8896.jpg
https://i.ibb.co/WnyD4hT/IMG-8899.jpg
https://i.ibb.co/7WZDpYV/IMG-8901.jpg
https://i.ibb.co/0nqVQh8/IMG-8903.jpg
1x Soviet KDB0,01 group 3A2 single-crystal silicon ingot with hole electrical conductivity doped with boron, dimensions 30x42mm, weight 76g; - $45
With box label and electrical test report. Early 1977.
  
SOLD Soviet KDB5/0.3 group 1A1e single-crystal silicon ingot with hole electrical conductivity doped with boron, dimensions 40x108mm, weight 305g; - $55 crazybubba64
With label and electrical test report. Early 1976. Made at the "plant of pure metals named after the 50th anniversary of the USSR"
 
GOST 19658-81 Monocrystalline silicon in ingots. Specifications in russian.
http://www.yfermer.ru/specifications/296167.html
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Wanted: 4 x VT-25-A tubes
Last edited by Vegeta on Wed Feb 16, 2022 11:30 am; edited 5 times in total |
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lavrentii
Joined: 14 Feb 2021
Posts: 799
Location: Bulgaria
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| Posted: Tue Feb 15, 2022 10:59 am Post subject: |
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| I will take it |
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Vegeta
Joined: 13 Apr 2013
Posts: 7049
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| Posted: Tue Feb 15, 2022 11:02 am Post subject: |
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SOLD
Thanks!
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sebskyman
Joined: 17 Oct 2013
Posts: 152
Location: London, UK
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| Posted: Tue Feb 15, 2022 2:52 pm Post subject: |
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| If you have another one, please let me know |
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lavrentii
Joined: 14 Feb 2021
Posts: 799
Location: Bulgaria
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| Posted: Tue Feb 15, 2022 2:54 pm Post subject: |
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| I am okay, let sebskyman have it |
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crazybubba64
Joined: 03 Jul 2018
Posts: 1371
Location: WI, USA
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| Posted: Tue Feb 15, 2022 2:55 pm Post subject: |
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Same here, please let me know if you find any more!
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sebskyman
Joined: 17 Oct 2013
Posts: 152
Location: London, UK
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| Posted: Tue Feb 15, 2022 3:03 pm Post subject: |
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| lavrentii wrote: | | I am okay, let sebskyman have it |
that is very kind, Lavrentii. Are you sure you do not want it? |
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lavrentii
Joined: 14 Feb 2021
Posts: 799
Location: Bulgaria
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| Posted: Tue Feb 15, 2022 3:05 pm Post subject: |
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| It's nice and interesting, but sure I can live without it and I am in a mood to make a fellow collector happy : ) |
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Vegeta
Joined: 13 Apr 2013
Posts: 7049
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| Posted: Tue Feb 15, 2022 3:06 pm Post subject: |
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I have a few more different sizes, I'll look one of these days and post more.
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lavrentii
Joined: 14 Feb 2021
Posts: 799
Location: Bulgaria
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| Posted: Tue Feb 15, 2022 3:18 pm Post subject: |
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sebskyman and crazybubba64, decide if you want this one or will wait for the others, both work for me.
Interesting about the ingot being doped with boron. I was thinking that doping is done after it is sliced into wafers, no?
So this one was doped while the crystal was being grown? |
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sebskyman
Joined: 17 Oct 2013
Posts: 152
Location: London, UK
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| Posted: Tue Feb 15, 2022 3:21 pm Post subject: |
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I am ok to get this one.
thanks. |
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lavrentii
Joined: 14 Feb 2021
Posts: 799
Location: Bulgaria
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| Posted: Tue Feb 15, 2022 3:28 pm Post subject: |
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| Dmitriy, please assign this one to sebskyman, thanks |
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cuttingedgecs
Joined: 08 Oct 2017
Posts: 1764
Location: Australia
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| Posted: Tue Feb 15, 2022 4:57 pm Post subject: |
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| lavrentii wrote: |
Interesting about the ingot being doped with boron. I was thinking that doping is done after it is sliced into wafers, no?
So this one was doped while the crystal was being grown? |
When it suits your process to create a solid piece of N or P material, this is absolutely your best option. It is much easier to introduce boron impurities when the silicon is melted, so the crystal can grow with impurities, rather than try to introduce new atoms into a crystalline structure after it is formed and solid. |
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Vegeta
Joined: 13 Apr 2013
Posts: 7049
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| Posted: Wed Feb 16, 2022 8:45 am Post subject: |
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added a couple of pieces, choose
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crazybubba64
Joined: 03 Jul 2018
Posts: 1371
Location: WI, USA
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| Posted: Wed Feb 16, 2022 9:08 am Post subject: |
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1x Soviet KDB5/0.3 group 1A1e single-crystal silicon ingot with hole electrical conductivity doped with boron, dimensions 40x108mm, weight 305g; - $55
Thanks!
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