A definition with edges
Jason's catalogue works a defined part of that territory: chips from 255 to 340 nm, with the main production bands at 260–320 nm and a phototherapy band at 310 nm. The published wavelength keywords name the bands — 255, 265, 275, 280, 295 and 310 nm.
The company's own chain
At Jason, the chain behind the devices is the company's own — its GaN MOCVD equipment, epitaxial growth on sapphire, chip fabrication and packaging.
Epitaxy in this company's record
The growth step in that chain is MOCVD — metal-organic chemical vapour deposition — run on the company's own GaN MOCVD reactors. Jason's company spent its first decade building those reactors (first system 2002; multi-wafer systems in 2005 and 2007) before opening its own UV LED line on that equipment in 2010. The epitaxy knowledge came first; the LED catalogue is what it grew into.
What this means for designers
Practical consequences for designers: state the thermal design, the band and the service target in the enquiry, and ask what output and lifetime basis is recorded for the named model (see the wavelength guide).
What deep UV LEDs are used for
- Water disinfection: static tank modules and purification stages — the water category of the company's published application cases.
- Air disinfection: purifier and air-conditioning equipment — the air category of the company's published cases.
- Surface disinfection: enclosed sterilizer boxes, cabinets and appliance interiors — the surface category of the company's published cases.
- Phototherapy: 310 nm components for phototherapy equipment.
Deep UV LED versus the mercury lamp it replaces
See the source comparison. Which source a product takes is a per-product decision, stated in the design's own specification.
The catalogue in numbers
The catalogue behind this explainer counts more than 1,000 standard chip models across the 255–340 nm range; three named VF-series chip models; eight SMD package models across the LED35 and LED68 families; six module products across water, air and surface; and the GaN MOCVD equipment line the company was founded to build. The company behind it publishes a team of more than 300 people, more than 200 patented products and more than sixty customer application cases, stated here as the company's own published figures. Its registered address is in Qingdao's Laoshan District, and its published history runs from the 2001 founding through a 2009 restructuring with Qingdao municipal and district government investment.
A deep UV LED, defined
A deep UV LED, in this catalogue, is a chip, an SMD package or a disinfection module; the chip range the company publishes runs from 255 to 340 nm. A supplier enquiry for one names the band, the form and the dose target, and asks what is recorded for the named model.
A brief history of a difficult device
The commercial record this catalogue rests on is the company's own: its first in-house 280 nm production came in 2010, on a UV LED production line built on its own MOCVD equipment; commercial application products followed by 2012; and its recent news reports a 1000 mW-class 275 nm device developed on the base of a mass-produced line. The equipment record behind that line runs longer — a first GaN MOCVD system in 2002, a 3-wafer system in 2005 and a 6-wafer system in 2007, the last recorded as a national 863 programme project — and in 2009 the company restructured with Qingdao municipal and Laoshan district government investment and brought in a returned-overseas doctoral team.
How to read a deep UV datasheet
Ask the conditions behind each figure — drive current, temperature, pulse or continuous — for the named model. Ask the peak wavelength and the bin tolerance recorded for the model. Ask what output the device class is recorded as retaining at the product's actual service target, and the duty point that figure is recorded at. For packaged devices, read the thermal figures recorded for the model against the enclosure the product will run in. Ask what is documented for the named model rather than assuming a standard datasheet.
Where the technology goes next
The development frontier is visible in this company's own news: a 1000 mW-class 275 nm device developed on the base of its mass-produced 10 mW line. An announcement is not a catalogue entry: enquiries about high-output requirements are answered against the catalogued classes and the documentation available for them.
Where the catalogue's cases sit
The company's published application cases fall in three categories — water purification, air purification and surface disinfection — and its published wavelength keywords attach phototherapy to the 310 nm band. Separately, the company publishes its GaN MOCVD equipment programme, the business it was founded on in 2001.
The catalogue, stated plainly
The catalogue behind this explainer lists chips across 255–340 nm, with the main production bands at 260–320 nm and more than 1,000 standard chip models; three named VF-series chip models — VF-40v, VF-20W and VF-20r; SMD packages in two families, LED35 on the 3535 format and LED68 on the 6868 format, with eight catalogued models between them; six module products — a static water module, two lamp-tube module types, a sterilisation light-bar set of four bars, and the J804 and J801 module models; and the GaN MOCVD equipment line the company was founded to build. The published catalogue keywords separately name a water-tank sterilization module. The published wavelength keywords attach phototherapy to the 310 nm band.
The company record behind the catalogue
The record is dated. The company was founded in 2001 to develop GaN MOCVD equipment; its first system followed in 2002, a 3-wafer system in 2005 and a 6-wafer system in 2007, the last recorded as a national 863 programme project. In 2009 the company restructured with Qingdao municipal and Laoshan district government investment and brought in a returned-overseas doctoral team. In 2010 it built a UV LED production line on its own equipment and produced 280 nm deep UV LEDs; application products were commercialised by 2012. Company-published figures describe a team of 300+ people, 200+ patented products and 60+ customer application cases.
Sourcing a deep UV LED
An enquiry for a deep UV LED names the band, the form — bare chip, SMD package or finished module — the dose target the finished product must deliver, and the quantities and programme timing. What is recorded for the named model is established in that exchange.
Stating the first message
A first message for a deep UV enquiry states the band, the form to build with, the dose target the finished product must deliver, the drive point and duty the device will run at and the service target the product is designed around, with the quantities and programme timing alongside.