Searching \ for 'OTP erasure' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: www.piclist.com/techref/index.htm?key=otp+erasure
Search entire site for: 'OTP erasure'.

Truncated match.
PICList Thread
'OTP erasure'
1998\04\20@191341 by Istvan, Retaller

flavicon
face
Message-Id: 13963_ha5kfu
From: ha5bwh@ha5kfu.#bp.hun.euro (Istvan, Retaller)
To: spam_OUTpiclistTakeThisOuTspammitvma.mit.edu

Hi, everybody!

Anyone has experience with re-utilizing OTP devices programmed accidentally

with wrong content? I tried to clean them by x-ray radiation with the help

of my friend, who served at a hospital at the technical staff. Later I

realized that the programmer I used to check to see the result, had contact

problems. Perhaps was a point when doses were good, but later was risen to

a level harmful for crystal structure...? The source was cobalt, but the

doses...? I don't remember.



     Stephen

1998\04\21@003907 by Mike Keitz

picon face
On Mon, 20 Apr 1998 22:59:51 +0000 "Istvan, Retaller"
<.....ha5bwhKILLspamspam@spam@HA5KFU.SCH.BME.HU> writes:

> Perhaps was a point when doses were good, but later was
>risen to
>
>a level harmful for crystal structure...? The source was cobalt, but
>the
>
>doses...? I don't remember.

All the reports I've heard are that exposure to X-rays or gamma rays will
erase OTP devices, but also damage them at about the same time.  There is
no (reliable) way to re-use them.


_____________________________________________________________________
You don't need to buy Internet access to use free Internet e-mail.
Get completely free e-mail from Juno at http://www.juno.com
Or call Juno at (800) 654-JUNO [654-5866]

1998\04\21@004656 by Sean Breheny

face picon face
At 12:44 AM 4/21/98 -0400, you wrote:
>On Mon, 20 Apr 1998 22:59:51 +0000 "Istvan, Retaller"
><ha5bwhspamKILLspamHA5KFU.SCH.BME.HU> writes:
>
>> Perhaps was a point when doses were good, but later was
>>risen to
>>
>>a level harmful for crystal structure...? The source was cobalt, but
>>the
>>
>>doses...? I don't remember.
>
>All the reports I've heard are that exposure to X-rays or gamma rays will
>erase OTP devices, but also damage them at about the same time.  There is
>no (reliable) way to re-use them.

I am no expert on radioactive materials, but I don't think that cobalt
emits X-rays in the same frequency range as, say, an x-ray machine. I think
they are MUCH harder (gamma rays). Maybe softer x-rays would be more likely
to cause erasure without crystal damage?

Sean

+--------------------------------+
| Sean Breheny                   |
| Amateur Radio Callsign: KA3YXM |
| Electrical Engineering Student |
+--------------------------------+
Fight injustice, please look at
http://homepages.enterprise.net/toolan/joanandrews/

Personal page: http://www.people.cornell.edu/pages/shb7
.....shb7KILLspamspam.....cornell.edu
Phone(USA): (607) 253-0315

More... (looser matching)
- Last day of these posts
- In 1998 , 1999 only
- Today
- New search...