News

Jelight Company, Inc. of Irvine, CA has acquired a United States Patent for their JFC-412 series of Portable Ultraviolet Floor Curing Equipment.

Curious about the UV floor curing process? Here is our newest demo video to show you how it all works.

We have just released our newest portable UV floor curing unit, the JFC-417L.  The JFC-417L provides a cure width ranging from 17-21"-- great for use on larger area UV floor cure jobs in the wood and VCT industries! 

 

EPROM Erasers & Wafer Cleaners

The expertise in ultraviolet light source manufacturing gained throughout the years has assisted us in designing UV Wafer and EPROM Erasers with superior performance and productivity. Our high intensity UV lamp design is at least 25% greater than competitive systems for increased output. Excellent uniformity ensures 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:


  How do EPROM works?

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.eprom chip erasing machine

Features

  • Quick load/unload trays for wafers and EPROM
  • All-metal housing.
  • Heavy duty construction for longevity.
  • Stackabe to save space.
  • Safety interlock to prevent accidental UV exposure.
 

Capacity

Erasing area

Typical intensity

Erasing time (minutes)

Power
requirements

Housing dimmension

Timer

Model

Inividual EPROMS

3" Wafers

4" Wafers

5" Wafers

6" Wafers

8" Wafers

Width

Depth

Height

µW/cm2

 

Nominal erasing energy

V

Hz

Amp

W

D

H

 

6

10

15

W-sec/cm2

2442

1071

112

60

32

28

15

42.00

24.00

2.50

50.000

2.0

3.3

5.0

200-240

50

35

48

40

17

D

2436

918

96

54

0

24

12

36.00

24.00

2.50

50.000

2.0

3.3

5.0

100-120

60

25

42

40

17

D

2436-220

918

96

54

28

24

12

36.00

24.00

2.50

50.000

2.0

3.3

5.0

200-240

50

25

42

40

17

D

1630

510

50

28

18

10

6

30.50

16.50

5.50

50.000

2.0

3.3

5.0

200-240

60

S

36

32

17

D

1630-220

510

50

28

18

10

6

30.50

16.50

5.50

50.000

2.0

3.3

5.0

200-240

50

S

36

32

17

D

1224

306

32

18

8

8

3

24.00

12.00

2.40

50.000

2.0

3.3

5.0

100-120

60

S

28

26

12

D

1224-220

306

32

18

8

8

3

24.00

12.00

2.40

50.000

2.0

3.3

5.0

200-240

50

S

28

26

12

D

9290

153

16

9

4

4

1

12.00

12.00

2.21

50.000

2.0

3.3

5.0

100-120

60

17

17

26

12

D

9290-220

153

16

9

4

4

1

12.00

12.00

2.21

50.000

2.0

3.3

5.0

200-240

50

S

17

26

12

D

20

20

0

0

0

0

0

3.75

3.75

0.00

15.000

6.7

11.1

16.7

100-120

60

S

5

10

2

Dial

10

12

0

0

0

0

0

2.00

5.00

0.00

15.000

6.7

11.1

16.7

100-120

60

S

3

10

2

None

high capacity uv erase tray

 

 Nominal Erasing Energy Erasing Capability: Chips/Hour
6W-sec/cm² 11,250 to 45,000
10W-sec/cm² 5,985 to 23,940
15W-sec/cm² 4,500

 

 

Custom products are also available, including: Conveyer Belt Systems, CHIPhERASERS of larger capacities, cassette to cassette wafer erasing systems, radiometers to measure intensity, additional trays.