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Why Hasn't This Been Done with Silicon Carbide

Started by John Savard December 12, 2014
On Friday, December 12, 2014 3:02:32 PM UTC-8, Phil Hobbs wrote:

> I was talking to a photodiode manufacturer the other day, who said that > it was becoming hard to get high-resistivity Ge wafers, so they couldn't > make me Ge PIN diodes any more. :( > > Germanium is unique in that it responds well from 350 to 1800 nm, which > is really important in instruments applications.
But, SiGe transistors are still made. High-resistivity Ge deposition (probably chemical vapor deposition with germane) should work, even if the underlying wafer is not 'intrinsic' enough. I thought Ge was less doping-sensitive than Si. How bad IS the (2014-era) Ge wafer supply, I wonder?
On Saturday, December 13, 2014 7:44:17 PM UTC, John Larkin wrote:

> We are approaching the limits of CMOS scaling, the end of Moore's Law, > but it's possible that things will level off around 7 nm features and > nothing will replace silicon. > > I was looking at this famous painting from 1514. > > https://en.wikipedia.org/wiki/File:D%C3%BCrer_Melancholia_I.jpg > > > See the hammer? After 500 years, it looks just like the hammers sold > today at Home Depot. It's good enough.
The point might be sound, but the hammer is a design not seen today. It uses 2 side straps to hold the handle to the head, a far weaker arrangement than today's models. NT
On 2014-12-14, meow2222@care2.com <meow2222@care2.com> wrote:

>> https://en.wikipedia.org/wiki/File:D%C3%BCrer_Melancholia_I.jpg >> >> See the hammer? After 500 years, it looks just like the hammers sold >> today at Home Depot. It's good enough. > > The point might be sound, but the hammer is a design not seen today. It uses 2 side straps to hold the handle to the head, a far weaker arrangement than today's models.
16th century blacksmiths didn't have drop forges, carbon steel, or mass production. While the mode of operation is the same, a modern one-piece hammer will outperform that antique one. In 400 years CMOS will still be CMOS and a current mirror will still be a current mirror, but the semiconductor could be an offset-printed organic film, or someting even stranger. -- umop apisdn
On 13 Dec 2014 21:21:41 GMT, Jasen Betts <jasen@xnet.co.nz> wrote:

>On 2014-12-13, John Larkin <jlarkin@highlandtechnology.com> wrote: >> On Fri, 12 Dec 2014 22:25:34 -0800, Robert Baer >><robertbaer@localnet.com> wrote: >> >> >> https://en.wikipedia.org/wiki/File:D%C3%BCrer_Melancholia_I.jpg >> >> >> See the hammer? After 500 years, it looks just like the hammers sold >> today at Home Depot. It's good enough. > >http://www.homedepot.com/b/Tools-Hardware-Hand-Tools-Hammers-Claw-Hammers/N-5yc1vZc98p > >I don't see any there with the handle riveted to the head, > >and the material is different too,
I have claw hammers with wooden handles and one-piece all steel hammers. My wife has a Tomboy Tools pink fiberglass-handle hammer. They're all about the size and shape, and work like, the one in the painting. Beds and chairs and doors and stairs haven't changed much either, in 500 years. They work the same. The trend in computing devices, what with phones and tablets replacing big-box PCs, is towards *less* compute power. If we're stuck with 15 nm CMOS logic forever, we'll survive. -- John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
Den s=F8ndag den 14. december 2014 20.01.32 UTC+1 skrev John Larkin:
> On 13 Dec 2014 21:21:41 GMT, Jasen Betts <jasen@xnet.co.nz> wrote: >=20 > >On 2014-12-13, John Larkin <jlarkin@highlandtechnology.com> wrote: > >> On Fri, 12 Dec 2014 22:25:34 -0800, Robert Baer > >><robertbaer@localnet.com> wrote: > >> > >> > >> https://en.wikipedia.org/wiki/File:D%C3%BCrer_Melancholia_I.jpg > >> > >> > >> See the hammer? After 500 years, it looks just like the hammers sold > >> today at Home Depot. It's good enough. > > > >http://www.homedepot.com/b/Tools-Hardware-Hand-Tools-Hammers-Claw-Hammer=
s/N-5yc1vZc98p
> > > >I don't see any there with the handle riveted to the head,=20 > > > >and the material is different too, >=20 > I have claw hammers with wooden handles and one-piece all steel > hammers. My wife has a Tomboy Tools pink fiberglass-handle hammer. > They're all about the size and shape, and work like, the one in the > painting. >=20
one of the youtube machinist have a serious hammer fetish :) http://youtu.be/0oOXzUKnu_Q -Lasse
On 12/14/2014 11:07 AM, Lasse Langwadt Christensen wrote:
> Den s&#2013266168;ndag den 14. december 2014 20.01.32 UTC+1 skrev John Larkin: >> On 13 Dec 2014 21:21:41 GMT, Jasen Betts <jasen@xnet.co.nz> wrote: >> >>> On 2014-12-13, John Larkin <jlarkin@highlandtechnology.com> wrote: >>>> On Fri, 12 Dec 2014 22:25:34 -0800, Robert Baer >>>> <robertbaer@localnet.com> wrote: >>>> >>>> >>>> https://en.wikipedia.org/wiki/File:D%C3%BCrer_Melancholia_I.jpg >>>> >>>> >>>> See the hammer? After 500 years, it looks just like the hammers sold >>>> today at Home Depot. It's good enough. >>> >>> http://www.homedepot.com/b/Tools-Hardware-Hand-Tools-Hammers-Claw-Hammers/N-5yc1vZc98p >>> >>> I don't see any there with the handle riveted to the head, >>> >>> and the material is different too, >> >> I have claw hammers with wooden handles and one-piece all steel >> hammers. My wife has a Tomboy Tools pink fiberglass-handle hammer. >> They're all about the size and shape, and work like, the one in the >> painting. >> > > one of the youtube machinist have a serious hammer fetish :) > > http://youtu.be/0oOXzUKnu_Q > > -Lasse >
Good grief! 20 minutes of describing hammers?
On Sun, 14 Dec 2014 15:35:30 -0800, Bill Martin <wwm@wwmartin.net>
wrote:

>On 12/14/2014 11:07 AM, Lasse Langwadt Christensen wrote: >> Den s&#2013266168;ndag den 14. december 2014 20.01.32 UTC+1 skrev John Larkin: >>> On 13 Dec 2014 21:21:41 GMT, Jasen Betts <jasen@xnet.co.nz> wrote: >>> >>>> On 2014-12-13, John Larkin <jlarkin@highlandtechnology.com> wrote: >>>>> On Fri, 12 Dec 2014 22:25:34 -0800, Robert Baer >>>>> <robertbaer@localnet.com> wrote: >>>>> >>>>> >>>>> https://en.wikipedia.org/wiki/File:D%C3%BCrer_Melancholia_I.jpg >>>>> >>>>> >>>>> See the hammer? After 500 years, it looks just like the hammers sold >>>>> today at Home Depot. It's good enough. >>>> >>>> http://www.homedepot.com/b/Tools-Hardware-Hand-Tools-Hammers-Claw-Hammers/N-5yc1vZc98p >>>> >>>> I don't see any there with the handle riveted to the head, >>>> >>>> and the material is different too, >>> >>> I have claw hammers with wooden handles and one-piece all steel >>> hammers. My wife has a Tomboy Tools pink fiberglass-handle hammer. >>> They're all about the size and shape, and work like, the one in the >>> painting. >>> >> >> one of the youtube machinist have a serious hammer fetish :) >> >> http://youtu.be/0oOXzUKnu_Q >> >> -Lasse >> >Good grief! 20 minutes of describing hammers?
Don't knock it. -- John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
On 12/14/2014 03:41 PM, John Larkin wrote:
> On Sun, 14 Dec 2014 15:35:30 -0800, Bill Martin <wwm@wwmartin.net> > wrote: > >> On 12/14/2014 11:07 AM, Lasse Langwadt Christensen wrote: >>> Den s&#2013266168;ndag den 14. december 2014 20.01.32 UTC+1 skrev John Larkin: >>>> On 13 Dec 2014 21:21:41 GMT, Jasen Betts <jasen@xnet.co.nz> wrote: >>>> >>>>> On 2014-12-13, John Larkin <jlarkin@highlandtechnology.com> wrote: >>>>>> On Fri, 12 Dec 2014 22:25:34 -0800, Robert Baer >>>>>> <robertbaer@localnet.com> wrote: >>>>>> >>>>>> >>>>>> https://en.wikipedia.org/wiki/File:D%C3%BCrer_Melancholia_I.jpg >>>>>> >>>>>> >>>>>> See the hammer? After 500 years, it looks just like the hammers sold >>>>>> today at Home Depot. It's good enough. >>>>> >>>>> http://www.homedepot.com/b/Tools-Hardware-Hand-Tools-Hammers-Claw-Hammers/N-5yc1vZc98p >>>>> >>>>> I don't see any there with the handle riveted to the head, >>>>> >>>>> and the material is different too, >>>> >>>> I have claw hammers with wooden handles and one-piece all steel >>>> hammers. My wife has a Tomboy Tools pink fiberglass-handle hammer. >>>> They're all about the size and shape, and work like, the one in the >>>> painting. >>>> >>> >>> one of the youtube machinist have a serious hammer fetish :) >>> >>> http://youtu.be/0oOXzUKnu_Q >>> >>> -Lasse >>> >> Good grief! 20 minutes of describing hammers? > > Don't knock it. > >
I hear you knok'in, but you can't come in... something like that.
On Saturday, December 13, 2014 2:44:17 PM UTC-5, John Larkin wrote:

> Problem is, CMOS is cheap and keeps getting faster. Things like cell > phones keep trending to custom cmos, even in the RF sections, which, > tragically, results in end-of-life on all sorts of cool discrete GaAs > parts. > > We are approaching the limits of CMOS scaling, the end of Moore's Law, > but it's possible that things will level off around 7 nm features and > nothing will replace silicon. > > I was looking at this famous painting from 1514. > > https://en.wikipedia.org/wiki/File:D%C3%BCrer_Melancholia_I.jpg
Hey, I went to that guy's house ages ago. http://en.wikipedia.org/wiki/Albrecht_D%C3%BCrer%27s_House (He wasn't in, so we left.) They still have a Christmas Market in the town square.
> See the hammer? After 500 years, it looks just like the hammers sold > today at Home Depot. It's good enough.
It's Christmas, so we're all torn between the iHammer6, or Windows Hammer 8.1c.24. (When all you have's a hammer, everything looks like a nail.) Cheers, James Arthur
On 2014-12-14, Bill Martin <wwm@wwmartin.net> wrote:
> On 12/14/2014 11:07 AM, Lasse Langwadt Christensen wrote: >> Den s&oslash;ndag den 14. december 2014 20.01.32 UTC+1 skrev John Larkin: >>> On 13 Dec 2014 21:21:41 GMT, Jasen Betts <jasen@xnet.co.nz> wrote: >>> >>>> On 2014-12-13, John Larkin <jlarkin@highlandtechnology.com> wrote: >>>>> On Fri, 12 Dec 2014 22:25:34 -0800, Robert Baer >>>>> <robertbaer@localnet.com> wrote: >>>>> >>>>> >>>>> https://en.wikipedia.org/wiki/File:D%C3%BCrer_Melancholia_I.jpg >>>>> >>>>> >>>>> See the hammer? After 500 years, it looks just like the hammers sold >>>>> today at Home Depot. It's good enough. >>>> >>>> http://www.homedepot.com/b/Tools-Hardware-Hand-Tools-Hammers-Claw-Hammers/N-5yc1vZc98p >>>> >>>> I don't see any there with the handle riveted to the head, >>>> >>>> and the material is different too, >>> >>> I have claw hammers with wooden handles and one-piece all steel >>> hammers. My wife has a Tomboy Tools pink fiberglass-handle hammer. >>> They're all about the size and shape, and work like, the one in the >>> painting. >>> >> >> one of the youtube machinist have a serious hammer fetish :) >> >> http://youtu.be/0oOXzUKnu_Q >> >> -Lasse >> > Good grief! 20 minutes of describing hammers?
Stop. Hammer time! -- umop apisdn