Michael Beck Phoseon Technologymedia.mycrowdwisdom.com.s3.amazonaws.com/asc/2017 Annual Convention...circuit to the negative (n- type or cathode) ... 60K Hours > L80 @ 60,000 hours

www.phoseon.com

The State of UV LED TodayMichael Beck

Phoseon Technology

Presented to the ASC ConventionApril 4, 2017

Page 2 www.phoseon.com

Phoseon Technology

ISO 9001: 2008 Certified

Americas

EuropeMiddle East

AfricaAsia

Pacific

Coverage

World-wide support

100% LED focused

Over 250 Patents

LED Pioneer since 2002

Over 65,000 units shipped

HQ in Portland, Oregon USA

Supply chain control

Company


Initial Market: UV LED Curing

UV INKSUV COATINGS

Industrial

Cables

Wood

Displays

Digital Inkjet

Flexographic

Screen

Offset

Enabling New Capabilities & Processes Worldwide

UV ADHESIVES

Displays

Electronics

Speakers

Medical


UV LED Adhesive Applications

UV LED curing is ideal for adhesive applications providing accurate, safe, and high quality adhesion

Consistent, reliable, repeatable UV output

LabelsPlastic & Glass

Food

Beverage

Pharmaceutical

MedicalSyringes

Catheters

Endoscopes

Hearing Aids

IndustrialElectronics

Fixtures

Tile

Concrete


Conventional UV vs. UV LED


Industrial UV Energy SourcesMicrowave

(1970s)Voltage Arc/Electrode

(1940s)UV LED(2000s)


A solid-state semiconductor device that produces light when an electrical current is allowed to flow from the positive (p-type or anode) side of the circuit to the negative (n-type or cathode) side

This is called the ‘p-n junction’LED output has increased over time, but it’s more of the Array, Optics, and Thermal management design that has allowed an increase in UV Irradiance output

LED Basics


UV LED vs. Conventional Lamps

Lifetime (on-time) > 20,000 hours 500-2,000 hour bulb life

Environmental Mercury FreeOzone Free

Mercury WasteOzone Generation

Input Power Small (< half) Large

Maintenance Minimal Bulb replacement, reflectorcleaning/replacement

On / Off Instant Minutes

Heat 60° C 350° C

UV LED Mercury Lamp


UV LED lamps available at 365, 385, 395 or 405nm wavelengths.Materials must optimized for narrow wavelength.

Output power can exceed 1kW of pure UV-A energy.

Wavelength Comparison

Extremely high power in narrow range


Phoseon LED Lifetime (On-Time)UV Intensity

10K 20K 30K 40K

100%

70%

LED90%80%

Phoseon has over 50 units on long-term life test at any single time.

Testing includes various duty cycles, high-temperature, air-flow reduction, and other stress test parameters.

An example of test data

50K

Conventional Lamps: Replaced every 2,500 hours

60K Hours

> L80 @ 60,000 hours

Over 2 Million hours of SLM lifetime testing


More consistent UV output and stable semi-conductor process.Higher quality curing and higher-yield production.

Instant-on/off and ultra-long lifetimesMore productivity, higher utilization.Elimination of consumables; replacement bulbs, reflectors, magnetrons, etc.

Lower heat-load on the curing area (no IR)Heat sensitive materials.Safer work environment .

Energy requirements reduced (50-90% reduction in energy required)Reduced operating costs.Reduced or eliminated infrastructure for exhaust, ozone removal, etc.

Environmental advantagesNo mercury disposal issues.No ozone generation.Dramatically lower carbon footprint.

Customer acceptance of UV LED has pulled suppliers and formulators

UV LED Value Proposition


Challenges of UV LED

LED lamps are divergent sources which can impact working distance.Peak irradiance decreases with distance.Optics/reflectors can mitigate this in some situations.Light guides are generally very inefficient with UV LED.

Chemistry of adhesives may have to be optimized.Photoinitiators are limited to UV-A typesOxygen inhibition issues can require reformulation.

A large number of recent new suppliers have entered the marketplace.Low cost offerings can compromise reliability, lifetime, and consistency.Specifications/standards still being developed.IP related issues have yet to emerge.

Measurement devices (radiometers) must be designed for UV LED.

In spite of the challenges, UV LED systems have proven to be an extremely effective solution for a growing number of applications.


Types of UV LED Lamps


This is not radiated IR energy but energy created by electrical inefficiencies.Approximately 35% of input power is converted to useable UV output.Approximately 65% of input power is converted to unwanted heat.Cannot exceed maximum LED junction temperature and maintain lifetime.Cooling is designed to optimize the efficiency of the LEDs.Cooling can be air or water.

Thermal Management is Critical

30%

70%


UV LED Sources – Air Cooled

Emitting Window and Semiconductor Light

Matrix (SLM) of UV LEDs

DC Power, Control, Diagnostics

Cooling FansInternal Heat Sink

Cooling Fins

365 nm @ 8 W/cm2

385, 395, & 405 nm @ 16 W/cm2


UV LED Sources – Water Cooled

Emitting Window and Semiconductor Light

Matrix (SLM) of UV LEDs

DC Power, Control,

Diagnostics

Water Cooling Tubes

Internal Heat Sink Water Manifold

365 nm @ 12 W/cm2

385, 395, & 405 nm @ 24 W/cm2


Water-cooled UV LED systemsAre capable of higher power.Are usually smaller and more compact.Require a recirculating chiller or heat exchange system.Water must be clean and treated with additives to avoid corrosion.Condensation is a concern if water temperatures below the dew point.

Systems spec’d for 30C better than 15C in resisting condensation.

Air-cooled UV LED systemsMore cost effective since a chiller/plumbing/water maintenance not required.Slightly less efficient than water cooled systems.

The power of some air-cooled systems now equals or exceeds water cooled systems of 2-3 years ago.

Air-cooled systems are generally larger to due fan and heat-sink configurations.

Air-Cooled vs. Water-Cooled UV LED


The Current State of UV LED


Performance Continues to ImproveIrradiance (Watts/cm2) and energy density (Joules/cm2) increasing.Available form factors expanding.Reliability, efficiency, and life of lamps increasing.Prices decreasingUVA is the most prevalent UV LED output.UVB and UVC Sources still not commercially viable for most applications.Growing number of UV LED lamp suppliers.

Applications are expanding rapidly.UV LED curing is commercially used for inks, adhesives, and coatings.New applications are being explored daily.Applications are switching over quicker than predicted in many segments.Formulation development tends to be end-user driven

New raw materials are being introduced to facilitate reformulation.

The Current State of UV LED Technology


Choosing a LED Curing Supplier

LED Capability

Intellectual Property

Reliability

Service

Percentage of resources dedicated to LED?Percentage of revenue from LED?Demo units available for testing?Bare or packaged diodes for array customization?

Number of LED patents?Enable end-users freedom to operate?Worldwide coverage?

Utilize Highly Accelerated Life Tests (HALT)?Utilize semiconductor mfg and burn-in process?Long-term life testing > 60,000 hours.ISO certified? UL Qualified products?

Worldwide Sales & Technical support?Worldwide LED understanding?Root cause analysis & reporting?

The skill-sets and capabilities required for UV LED include electronics, semiconductors, optics, thermal management, packaging, mechanical and reliability engineering


UV LED lamps are replacing conventional Hg-based UV lamps every day.The number of applications continues to grow.The challenges associated with formulation have been resolved in most inks, many adhesives and some coatings.

More work to be done but initial acceptance indicates that most obstacles are business related, not technical.

The costs of UV LED lamps have reached acceptance for many applications.

Initial investment approaching or at parity with high quality Hg systems.Compelling value proposition.Superior cost of ownership.Customer acceptance is very high. Once the transition is made, there is no reversion to conventional technology.

The customer should evaluate any potential supplier thoroughly and confirm (or separate) the claims from the data.

Conclusions


Thank You!Questions?

Michael BeckDirector of Sales, Americas

Phoseon Technology734-576-1010

[email protected]

Documents

Michael Beck Phoseon Technologymedia.mycrowdwisdom.com.s3.amazonaws.com/asc/2017 Annual Convention...circuit to the negative (n- type or cathode) ... 60K Hours > L80 @ 60,000 hours