If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
New semiconductor material investigated
|
#2
|
|||
|
|||
New semiconductor material investigated
On Tuesday, November 24, 2020 at 4:42:16 PM UTC-5, geoff wrote:
Sounds promising. https://tinyurl.com/yxt5j7l7 It will find a niche somewhere, but don’t expect it to show up in consumer products for quite awhile. For example, GaAs and GaN have both been around for over a decade and their applications are still quite spotty: compared to classical silicone, the wafers are smaller & more expensive, plus you can easily blow through a couple Million just to optimize one’s manufacturing to get yields up. -hh |
#3
|
|||
|
|||
New semiconductor material investigated
On 25/11/2020 4:41 pm, -hh wrote:
On Tuesday, November 24, 2020 at 4:42:16 PM UTC-5, geoff wrote: Sounds promising. https://tinyurl.com/yxt5j7l7 It will find a niche somewhere, but don’t expect it to show up in consumer products for quite awhile. For example, GaAs and GaN have both been around for over a decade and their applications are still quite spotty: compared to classical silicone, the wafers are smaller & more expensive, plus you can easily blow through a couple Million just to optimize one’s manufacturing to get yields up. GaAs LEDs have existed for nearly 60 years. geoff |
#5
|
|||
|
|||
New semiconductor material investigated
On Wed, 25 Nov 2020 10:20:34 +1300, geoff
wrote: Sounds promising. https://tinyurl.com/yxt5j7l7 The article reads like a puff. Heat is generated in IC circuits not just by the resistance to the flow of electricity but by switching losses. Heat is generated every time a bit switches from 0 to 1 (or vice versa). Even if there are no ohmic losses, switching losses remain. -- Regards, Eric Stevens |
#6
|
|||
|
|||
New semiconductor material investigated
On Wednesday, November 25, 2020 at 12:38:35 PM UTC-5, Alfred Molon wrote:
In article , says... On 25/11/2020 4:41 pm, -hh wrote: On Tuesday, November 24, 2020 at 4:42:16 PM UTC-5, geoff wrote: Sounds promising. https://tinyurl.com/yxt5j7l7 It will find a niche somewhere, but don?t expect it to show up in consumer products for quite awhile. For example, GaAs and GaN have both been around for over a decade and their applications are still quite spotty: compared to classical silicone, the wafers are smaller & more expensive, plus you can easily blow through a couple Million just to optimize one?s manufacturing to get yields up. GaAs LEDs have existed for nearly 60 years. But Gallium is a quite rare element (especially if compared to silicon). Probably also much more expensive. He’s missing the point, which is just because a material exists doesn’t mean that it will “take over” the entire industry...and his own “GaAs LED” claim confirms this perspective. FWIW, one of the problems that GaAs has had which have hindered semiconductor designs is the medium still has uniformity problems with voids..it progressively trashes the wafer yield as one’s product size increases. GaN is better in this regards, but its wafers are even more expensive...it was used a few years back in a ‘DARPA Challenge’ program... think it was for a 10Gbps+ wireless link? Guy I knew who was working on it does of a heart attack, so I’ve lost track... -hh |
#7
|
|||
|
|||
New semiconductor material investigated
On 26/11/2020 12:35 pm, Eric Stevens wrote:
On Wed, 25 Nov 2020 10:20:34 +1300, geoff wrote: Sounds promising. https://tinyurl.com/yxt5j7l7 The article reads like a puff. Heat is generated in IC circuits not just by the resistance to the flow of electricity but by switching losses. Heat is generated every time a bit switches from 0 to 1 (or vice versa). Even if there are no ohmic losses, switching losses remain. The only cause of heat is current through resistance. This happens *during* the transistion of 0-1 and vice-versa in switching applications. geoff |
#8
|
|||
|
|||
New semiconductor material investigated
On 11/26/20 12:46 AM, geoff wrote:
On 26/11/2020 12:35 pm, Eric Stevens wrote: On Wed, 25 Nov 2020 10:20:34 +1300, geoff wrote: Sounds promising. https://tinyurl.com/yxt5j7l7 The article reads like a puff. Heat is generated in IC circuits not just by the resistance to the flow of electricity but by switching losses. Heat is generated every time a bit switches from 0 to 1 (or vice versa). Even if there are no ohmic losses, switching losses remain. The only cause of heat is current through resistance. This happens *during* the transistion of 0-1 and vice-versa in switching applications. geoff Because during the transition from open to closed (or vice versa), there is current flow through a resistance. A switch circuit does not go from open to closed (or vice versa) in no time at all; there is a very (very, very) short time when the switch is a (variable) resistor. -- Ken Hart |
#9
|
|||
|
|||
New semiconductor material investigated
On 27/11/2020 2:23 am, Ken Hart wrote:
On 11/26/20 12:46 AM, geoff wrote: On 26/11/2020 12:35 pm, Eric Stevens wrote: On Wed, 25 Nov 2020 10:20:34 +1300, geoff wrote: Sounds promising. https://tinyurl.com/yxt5j7l7 The article reads like a puff. Heat is generated in IC circuits not just by the resistance to the flow of electricity but by switching losses. Heat is generated every time a bit switches from 0 to 1 (or vice versa). Even if there are no ohmic losses, switching losses remain. The only cause of heat is current through resistance. This happens *during* the transistion of 0-1 and vice-versa in switching applications. geoff Because during the transition from open to closed (or vice versa), there is current flow through a resistance. A switch circuit does not go from open to closed (or vice versa) in no time at all; there is a very (very, very) short time when the switch is a (variable) resistor. Yeah, like what I said, geoff |
#10
|
|||
|
|||
New semiconductor material investigated
On Thu, 26 Nov 2020 08:23:37 -0500, Ken Hart
wrote: On 11/26/20 12:46 AM, geoff wrote: On 26/11/2020 12:35 pm, Eric Stevens wrote: On Wed, 25 Nov 2020 10:20:34 +1300, geoff wrote: Sounds promising. https://tinyurl.com/yxt5j7l7 The article reads like a puff. Heat is generated in IC circuits not just by the resistance to the flow of electricity but by switching losses. Heat is generated every time a bit switches from 0 to 1 (or vice versa). Even if there are no ohmic losses, switching losses remain. The only cause of heat is current through resistance. This happens *during* the transistion of 0-1 and vice-versa in switching applications. geoff Because during the transition from open to closed (or vice versa), there is current flow through a resistance. A switch circuit does not go from open to closed (or vice versa) in no time at all; there is a very (very, very) short time when the switch is a (variable) resistor. Quite right and switching heating can be a significant part of the the thermal load. -- Regards, Eric Stevens |
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Fair use of copyright material | Cryptopix | 35mm Photo Equipment | 5 | June 1st 07 10:35 AM |
National Semiconductor sells off imaging division to Kodak | y_p_w | Digital Photography | 3 | August 27th 04 10:00 PM |
lensboard material | Nick Zentena | Medium Format Photography Equipment | 5 | August 12th 04 02:44 PM |
dark slide material | joe smigiel | Large Format Photography Equipment | 3 | May 5th 04 04:21 AM |
diffusing material for exposure meter | Gregory W Blank | In The Darkroom | 3 | March 28th 04 09:45 PM |