Have you done SIMS analysis on your diamond? I find some difficulty in the
sputtering energetics of a 2.4GHz uwave deposition technique with hydrogen
to
reduce the silica to silicon due to your tube. Is your tube a quartz tube
or
some other glass? What are your (gas)?sources for deposition? Would you
reference the silicon contamination claim?

Have you done SIMS analysis on your diamond? I find some difficulty in the
sputtering energetics of a 2.4GHz uwave deposition technique with hydrogen
to
reduce the silica to silicon due to your tube. Is your tube a quartz tube
or
some other glass? What are your (gas)?sources for deposition? Would you
reference the silicon contamination claim?

not yet, thusfar all i have done is optical spectroscopy as thats the limit
of my inhouse ability. the si conclusion came from data on a line in
zaitsev's 'optical properties of diamond'. I dont have my notes infront of
me. i'll ahve to dig them up to provide any additional details..

I'm using an astex ax7610 as a reactor:
http://www.mksinst.com/pdf/ASTEXax7610DS.pdf
the tube is quartz
I'm using uhp argon with an saes filter for a carrier gas (ppb level purity)
and uhp h2 and methane from my gas supplier (4 1/2 nines)

bob wrote:

Have you done SIMS analysis on your diamond? I find some difficulty in the
sputtering energetics of a 2.4GHz uwave deposition technique with hydrogen
to
reduce the silica to silicon due to your tube. Is your tube a quartz tube
or
some other glass? What are your (gas)?sources for deposition? Would you
reference the silicon contamination claim?

not yet, thusfar all i have done is optical spectroscopy as thats the limit
of my inhouse ability. the si conclusion came from data on a line in
zaitsev's 'optical properties of diamond'. I dont have my notes infront of
me. i'll ahve to dig them up to provide any additional details..

I'm using an astex ax7610 as a reactor:
http://www.mksinst.com/pdf/ASTEXax7610DS.pdf
the tube is quartz
I'm using uhp argon with an saes filter for a carrier gas (ppb level purity)
and uhp h2 and methane from my gas supplier (4 1/2 nines)

Looks to me like you are doing your homework. I am interested in a potential
sputtering yield of silica then a reduction to silicon as your working premise.

Bob

boer wrote:

bob wrote:

Have you done SIMS analysis on your diamond? I find some difficulty in the
sputtering energetics of a 2.4GHz uwave deposition technique with hydrogen
to
reduce the silica to silicon due to your tube. Is your tube a quartz tube
or
some other glass? What are your (gas)?sources for deposition? Would you
reference the silicon contamination claim?

not yet, thusfar all i have done is optical spectroscopy as thats the limit
of my inhouse ability. the si conclusion came from data on a line in
zaitsev's 'optical properties of diamond'. I dont have my notes infront of
me. i'll ahve to dig them up to provide any additional details..

I'm using an astex ax7610 as a reactor:
http://www.mksinst.com/pdf/ASTEXax7610DS.pdf
the tube is quartz
I'm using uhp argon with an saes filter for a carrier gas (ppb level purity)
and uhp h2 and methane from my gas supplier (4 1/2 nines)

Looks to me like you are doing your homework. I am interested in a potential
sputtering yield of silica then a reduction to silicon as your working premise.

Bob

I re-read your last post again. UHP argon might give you the energetics needed to
sputter silica from the tube. However, I'm still stumped on the silica being
reduced to silicon.

The application requires bleeding edge purity of the diamond layer,
compositionally and isotopically, in a production environment.
Whatever the eventual answer, we all know the rule of thumb: If you
need PhDs on your production line, you don't have a production line.
Scientists to create it, engineers to build it and make it work,
illegal aliens or White trash to run it at minimum wage. Oversight is
a managerial prerogative and not bound by objective reality.