Transcription
85PINEAVEGOLETA,CA93117IEEWorkshop1
“Laser diodes are lighting's future.”- Professor Shuji Nakamura, 2014 Nobel Prize in Physics,rLuxReview, Nov 5, 20142
INTRODUCTION TO SORAA a-onHistory SLDspunoutofSoraain2013 nbaars,Speck,DrJamesraring,PaulRudyOpera-ons HQandEpiinGoleta,CA(SantaBarbara) Deviceengineering&fabinFremont,CATechnology NextgenLDsbasedonSemipolarGaN Rightsto390patentsandapplica ons
OUTLINE AND KEY MESSAGES LDsaresolu ontodroopwith10- ‐20Xmorepowerperchipand10,000Xthespa albrightnessofpowerLEDs LD phosphoralreadysuperiorfordirec onalapplica ons oachievemaximumadop oninligh ng GaAsLDevolu rgyEfficient 80lm/Waf4
LaserDisplays&Ligh ngSegmentsSpecialty on0–1kHome theater/TV lumensMicro accessories1k–10klumens 5klumensProjection lightingEmbedded picoWearablesAutomotive5
LaserDiodebasedLigh eHighlydirec onalemissionHigherCurrentDensity10- ‐100A/cm2forLEDs1- werchip
LD PHOSPHOR FOR ILLUMINATION Lowetendue highbrightnessmakeLDsidealexcita-onsourceLD Phosphor 100umØspotonphosphor3WLDà 380W/mm2LDs300- /W7
LD PHOSPHOR CONFIGURATIONS PhosphortechnologyforhighpowerdensityLDexcita onexiststoday Ceramicandsingle- hIQE,androbustlife-mesat 200Cwith3WLDspots 100umInfinitenumberofLD phosphorconfigura ridge,tunnellight;integratedbldgmaterials8
LaserLightforAutoLigh ngVISIBILITY RANGE: LASER HIGH BEAM, LED HIGHBEAM, LOW BEAM7
Laser Light Source: Increase Safety at Night700 meter range!10
LPPsheadlightsizereduc on,Valeo10mm target Laser gh ngSystemsISAL201311
Automo veligh ngmarketis 15B/yr“The automotive lighting market is growing steadily. The 2011 market sizewas estimated at EUR 14 billion, representing approximately 20 percent ofthe total market. This is expected to climb to EUR 18 billion by 2020.”From: “Lighting the way, Perspectives on the Global Lighting Market”McKinsey & Company, Dec, 201212
EXTERNAL QUANTUM Pulseddata13
LED VS LD: POWER PER CHIP AREACurrentLDsproduce10- D:Appl.Phys.43(2010)3540021.8WPulseddata14
RecenthighpowerperformancedemoSORAALASERDIODE 4WCWat25Cat445nm,15umstripewidthEnables 800lumensources,100lm/W Ontracktoachieve 3W/35%withnear- ‐termprocessimprovements Inthelongterm, 5W/50%willbeachievedwithawiderstripeanddeviceop miza on15
SemipolarisSuperiortoC- ‐planeNichia/OsramTechnology:C- ‐plane Polariza oncauseselectron/holesepara on Separa onreducesradia verecombina onefficiency ipolar Eliminatesspa alsepara onofelectronandhole Highradia verecombina onrateforincreasedgain Anisotropicstrainforreducedholemass 3x–5xincreasedgainforshorterdevices&lowIth16
LED VS LD: OUTPUT POWER 217
TechnicalAreasofProtec on Laser Display and IlluminationApps Laser Module Plus PhosphorModuleDevice Earliest Semipolar Technology– Blue Laser– Green LaserProcess/Epitaxy Laser epi and fab processes– Epitaxy structures and processes– Gen2 and Gen3 fabrication18
SORAALASERDIODEIP – Uniquely Strong Patent PositionISSUED/ALLOWED(U.S.)PENDING(U.S.)PENDING (FOREIGN)SLD OWNED373319SLD sto390U.S.andforeignpatentsandapplica-ons ThirdPartyFreedom- ‐to- ‐Operateforlaserdiodeproducts Blockingpatentrightsinsemi- ‐polarorienta on i- ‐polar Includes6earliestGen3LDU.S.applica onsand3foreignapplica ons19
SUMMARY: LDS HAVE BRIGHT ghtsources LDsareDroop- ‐Freeat 100xcurrentdensity LDsare10,000xbrighterandcanyield10- ‐20xmorepowerfromepiwafer indirec nligh-ng tforGaNLDs iencies BenefitsofLDswillbecomefurthercri calinNextGenligh ng20
“Laser diodes are lighting's future.” - Professor Shuji Nakamur
