Super high-pressure UV lamps (500W~35kW)

Super high-pressure UV lamps (500 W to 35 kW)
  • Litho-Patterning
  • MEMS, Electronic Components
  • Semiconductors
  • Liquid Crystal Display
  • Printed Circuit Board and PKG

Jointly developed with device manufacturers in response to their increasingly diverse needs, these lithographic UV lamps have earned high acclaim as well as user trust.
From our broad lineup of 500 W to 35 kW class lamps, we can offer optimum irradiation solutions to bolster your productivity and improve yields.
We can also develop lamps tailored to new devices developed by your company.
The Operating Manual is Here (requires member registration)

Photolithography light sources with optimized UV wavelengths
Ushio's super high-pressure UV lamps have been developed to effectively utilize three ultraviolet wavelengths (436, 405 and 365 nm) as high-intensity light sources with stable irradiance and long lifespan.
A point light source to maximize optical system performance
Since the lamp's arc size is nearly that of a point light source, easy diffusion allows uniform collimation.
A wide range of lamp outputs is available for manufacturing applications including semiconductors, LCDs, color filters, OLEDs, touch panels and substrate printing.
A wide range of lamp sizes from small (500 W class) to ultra-large (35 kW class) is available for substrate printing (lithography) needs.
High-intensity illumination maximizes the performance of existing systems
When throughput of existing equipment needs improvement, just using a high-intensity lamp can ensure improved productivity.* Some system manufacturers' products may require modification."
Lamp development according to required wavelength
We develop lamps to best fit our customer's needs when developing new devices. Please contact us for more details.
UV lifespan characteristics
Spectral Distribution
- Semiconductor circuit formation light source
- LCD pattern formation light source
- Color filter pattern formation light source
- OLED pattern formation light source
- Touch panel pattern formation light source
- PCB pattern formation light source
- MEMS pattern formation light source
- and other novel exposure applications

Model Rating
Horizontal irradiance (µW/cm2)
at 1 m from lamp
Total luminous flux
Inter-electrode cooling gap
Dimensions Product Specification
360 to
370 nm
400 to
410 nm
430 to
440 nm
dia. D1
dia. D2
(screw standard)
(screw standard)
USH-1005D 1,000 28 36±4 341 175 268 45,000 600 ±15° 3.0 240
206 91 40 15 M6×1.0 M6×1.0 -
USH-2004MB 2,000 54 37 648 320 440 90,000 500 ±15° 3.0 332
270 140 62 Hexagonal
M8×1.25 -
USH-3502MA 3,500 56 62 1,070 590 880 158,000 700 ±15° 6.6 336
290 145 70 Hexagonal
M8×1.25 M8×1.25 -
These three models are standard products. Feel free to ask us about designs that meet your demands.

Installed light source

Is the mercury used in these lamps harmful to the human body?

The mercury used in these lamps is an inorganic mercury compound. Generally speaking, inorganic mercury compounds are not easily absorbed by the human body. However, mercury vapor is harmful in any form, so if the lamp is broken or ruptures during use and any mercury vapor is inhaled, consult a physician immediately.

What is the state of the lamp when lit?

Mercury vapor in lamps emits strong light, reaching temperatures of about 750 degrees C inside the bulb, where the vapor pressure climbs to levels in excess of 20 atmospheres.

Is lamp performance affected by mercury adhering to the lamp's electrodes or the sides of the bulb?

When the lamp lights, any mercury adhering to the electrodes or sides of the lamp enters a gaseous state, and thus has no effect on performance.

Is there a limit to the number of times the lamp can flash?

Each lamp has a rated number of flashes. This is because the lamp may not light if the rated number of flashes is exceeded during the warranted service life. The number of flashes can be determined by referencing the specifications. Use this number as a guide. If the number of flashes is not clear, contact your sales representative.

Tell me about the lamp's warranty period.

Lamps have a warranted service life of 5 years from the month of manufacture. If the month of manufacture is not clear, check the specifications or contact your sales representative.

What should I do if I accidentally touch the lamp with my hands or if the lamp becomes dirty?

Clean the lamp by gently wiping the surface with a soft cloth moistened with alcohol (isopropyl alcohol).

How should I hold the lamp while carrying it?

Carry the lamp by gripping the it firmly by the base and holding it vertically with the anode (the large electrode inside the lamp) at the bottom. For details, see the instructions provided with the lamp.

What causes lamps to rupture?

The bulb of the lamp is made of silica glass, and if the glass is scratched, stress exerted at the site of the scratchy the bulb's high internal pressure can cause it to rupture. Furthermore, if the lamp is used long beyond its warranted service life, cumulative thermal strain can result in lamp rupture due to its high internal pressure.