20 Jelight Company, 20 Datasheet

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20

Manufacturer Part Number
20
Description
ERASER CHIP W/TIMER HOLDS 20 ICS
Manufacturer
Jelight Company
Series
CHIPhERASER®r
Type
EPROM Eraserr
Datasheets
1.10.pdf (3 pages)
2.10.pdf (3 pages)

Specifications of 20

Maximum Number Of Ic's
20
Maximum Time
Variable
Other names
JEL20
Ultraviolet EPROM erasers and wafer cleaners
http://www.jelight.com/eprom-erasers.php
Company Info
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CHIPhERASER ® - EPROM Erasers And Wafer Cleaners
Jelight Company Inc.
2 Mason
Irvine, CA 92618
Tel (949)380-8774 Fax (949)768-9457
Jelight Co.Inc.established in 1978, is a recognized producer of quality ultraviolet light sources
and related equipment. The expertise gained throughout the years has assisted us in
designing UV wafer and EPROM erasers with superior performance and productivity. High
Intensity UV Lamp Design Operating intensity is at least 25% greater than competitive
systems for increased throughput. Excellent uniformity insures fast and complete erasure.
How Do EPROMs Work?
The basic memory element was developed by Frohman-Bentchkowsky at Intel Corporation and
was known as the Floating-Gate-Avalanche-Injection MOS (FAMOS) transistor. It was
essentially a silicon gate MOS field effect transistor in which no connection was made to the
gate. The gate was in fact electrically "floating" in an insulating layer of silicon dioxide. The
devices have been fabricated in two structures: p-channel and n-channel. The p-channel
devices were the first EPROMs available commercially, but many devices are now using n-
channel technology. N-channel MOS devices have the advantage of being able to function with
a single power supply.
By application of sufficiently large potential difference between the source and drain, charge
can be injected into the "floating" gate which induces a charge in the substrate. The source-
to-drain impedance changes and a "p-channel" or "n-channel" is created, depending upon the
type of substrate. The presence or absence of conduction is the principle of data storage.
Application of short wave (254 nm) ultraviolet radiation causes the gate charge to leak away
and restores the device to its original unprogrammed state. EPROM manufacturers provide
"nominal erasing energies" to their devices; the amount of UV energy required to erase a
chip's memory. Erasing time can be calculated using following formula:
Most EPROMs have a nominal erasing energy of 15W-sec/cm². Some chips, however, require
as little as 6 or 10W-sec/cm², or as much as 25W-sec/cm², for complete erasure.
Features
Quick load/unload trays for wafers and EPROM
CERTIFIED
ISO 9001
Page 1 of 3
11/12/2008

20 Summary of contents

Page 1

... Erasing time can be calculated using following formula: Most EPROMs have a nominal erasing energy of 15W-sec/cm². Some chips, however, require as little 10W-sec/cm² much as 25W-sec/cm², for complete erasure. Features Quick load/unload trays for wafers and EPROM http://www.jelight.com/eprom-erasers.php Page ISO 9001 CERTIFIED 11/12/2008 ...

Page 2

... S 240 100- 1.25 50.000 2.0 3.3 5 120 200- 1.25 50.000 2.0 3.3 5 240 100- 0.00 15.000 6.7 11.1 16 120 100- 0.00 15.000 6.7 11.1 16 120 Erasing Capability: Chips/Hour 11,250 to 45,000 5,985 to 23,940 4,500 Page Housing Timer dimmension Dial None 11/12/2008 ...

Page 3

... REPLACEMENT GRID LAMPS FOR OTHER EPROM ERASING AND UVO- Cleaning SYSTEMS. http://www.jelight.com/eprom-erasers.php CUSTOM CHIPhERASERS OF LARGER DIMENSIONS AND CAPACITIES. CASSETTE TO CASSETTE WAFER ERASING SYSTEMS. RADIOMETERS/PHOTOMETERS FOR MEASURING INTENSITY. TRAYS FOR WAFER ERASING. Made in U.S.A. Previous page © All Rights Reserved - Jelight Company Inc. 2008 Page 11/12/2008 ...