Jelight Company, Inc. of Irvine, CA has acquired a United States Patent for their JFC-412 series of Portable Ultraviolet Floor Curing Equipment.
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:
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.
- 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.
|Nominal Erasing Energy||Erasing Capability: Chips/Hour|
|6W-sec/cm²||11,250 to 45,000|
|10W-sec/cm²||5,985 to 23,940|
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.