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From: GreenXenon on 24 Apr 2010 16:24
On Apr 14, 4:49 pm, spop...(a)speedymail.org (Steve Pope) wrote in
http://groups.google.com/group/comp.dsp/msg/870b1eaa0c654096 :
> glen herrmannsfeldt <g...(a)ugcs.caltech.edu> wrote:
>
> >There have been discussions about possible data retention in
> >both SRAM and DRAM, if you keep constant data for a long time.
>
> Good point -- you might see some carrier trapping in a capacitor that
> has been always charged, relative one that has not. But you
> won't see a voltage signal -- an actual charge -- after a period of
> usually seconds or minutes.
>
> The first problem, trapping of carriers or migration of atoms
> of some sort, is going to impact twin-transistor RAMs also.
>
> Steve


1. What is a carrier?

2. What is carrier trapping?


Thanks,

Green Xenon
From: Steve Pope on 24 Apr 2010 23:26
GreenXenon <glucegen1x(a)gmail.com> wrote:

>1. What is a carrier?

An electron or a hole

>2. What is carrier trapping?

I guess the more common name for it is "charge trapping".
An electron (usually) gets trapped in the middle of an
insulating layer (usually silicon dioxide). This cause
a permanent change in the field in a transistor. It can
be why some chips wear out after as few as five years,
depending on their design.

Steve
From: Tim Wescott on 25 Apr 2010 14:10
Steve Pope wrote:
> GreenXenon <glucegen1x(a)gmail.com> wrote:
>
>> 1. What is a carrier?
>
> An electron or a hole
>
>> 2. What is carrier trapping?
>
> I guess the more common name for it is "charge trapping".
> An electron (usually) gets trapped in the middle of an
> insulating layer (usually silicon dioxide). This cause
> a permanent change in the field in a transistor. It can
> be why some chips wear out after as few as five years,
> depending on their design.

Unless you're talking drug smuggling, in which case a "carrier" is
someone who actually takes the dope* from point A to point B.

Carrier trapping involves folks in uniform, and lots of really tense,
dangerous impoliteness.

* Funny how semiconductor physicists and druggies are both obsessed with
"dope".

--
Tim Wescott
Control system and signal processing consulting
www.wescottdesign.com
From: Eric Jacobsen on 25 Apr 2010 20:56
On 4/25/2010 11:10 AM, Tim Wescott wrote:
> Steve Pope wrote:
>> GreenXenon <glucegen1x(a)gmail.com> wrote:
>>
>>> 1. What is a carrier?
>>
>> An electron or a hole
>>
>>> 2. What is carrier trapping?
>>
>> I guess the more common name for it is "charge trapping".
>> An electron (usually) gets trapped in the middle of an
>> insulating layer (usually silicon dioxide). This cause
>> a permanent change in the field in a transistor. It can
>> be why some chips wear out after as few as five years,
>> depending on their design.
>
> Unless you're talking drug smuggling, in which case a "carrier" is
> someone who actually takes the dope* from point A to point B.
>
> Carrier trapping involves folks in uniform, and lots of really tense,
> dangerous impoliteness.
>
> * Funny how semiconductor physicists and druggies are both obsessed with
> "dope".

I was gonna say it must be in reference the battle of Leyte Gulf when
Admiral Halsey got suckered into sending the pocket carriers after the
Japanese decoy fleet.


--
Eric Jacobsen
Minister of Algorithms
Abineau Communications
http://www.abineau.com
From: Clay on 26 Apr 2010 11:20
On Apr 24, 4:24 pm, GreenXenon <glucege...(a)gmail.com> wrote:
> On Apr 14, 4:49 pm, spop...(a)speedymail.org (Steve Pope) wrote inhttp://groups.google.com/group/comp.dsp/msg/870b1eaa0c654096:
>
> > glen herrmannsfeldt  <g...(a)ugcs.caltech.edu> wrote:
>
> > >There have been discussions about possible data retention in
> > >both SRAM and DRAM, if you keep constant data for a long time.
>
> > Good point -- you might see some carrier trapping in a capacitor that
> > has been always charged, relative one that has not.  But you
> > won't see a voltage signal -- an actual charge -- after a period of
> > usually seconds or minutes.
>
> > The first problem, trapping of carriers or migration of atoms
> > of some sort, is going to impact twin-transistor RAMs also.
>
> > Steve
>
> 1. What is a carrier?
>
> 2. What is carrier trapping?
>
> Thanks,
>
> Green Xenon

Carrier is a company that makes air conditioners.

A carrier trap is a device to remove moisture from the freon lines
lest the water freezes and clogs the expansion valve.


If your question is more specific, then the answer will be more
specific.


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