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Gan

Microsoft Word - Coherent Whitepaper - Laser Processing of µLED

Microsoft Word - Coherent Whitepaper - Laser Processing of µLED

…| tech.sales@coherent.com | 800-527-3786 | 408-764-4983
Laser Lift-Off
Bulk GaN substrate wafer manufacturing is difficult, and not applicable to commercial LED
production. Instead, GaN layers are heteroepitaxially grown on dissimilar substrate materials
such as sapphire,…

CMM 11.5.indd

CMM 11.5.indd

…processing benefits from enabling excimer laser technologies. Like their large counterparts, micro-LEDs are obtained by growing gallium nitride (GaN) films on sapphire wafers. In order to reduce the device height and increase the device efficiency, the GaN-based micro-LED layers are transferred…

LLO WavelengthAdvantage.pdf

LLO WavelengthAdvantage.pdf

…decompose the GaN into metallic gallium. Due to these requirements, the excimer laser, especially the KrF excimer laser operating at 248 nm, is the first choice for LLO. 248nm line sapphire wafer separation The figure below is a white light interferometry image of a gallium nitride (GaN) epi-wafer…

Photonik Feb2014.pdf

Photonik Feb2014.pdf

…as
GaN growth wafers.
Separating the sapphire wafer from the
GaN is done by means of the 248
nm
excimer laser, which selectively irradiates
the GaN through the sapphire wafer. At
such short UV wavelength sapphire is virtually transmissive while GaN is strongly…

Conflict Minerals Report 2017 Calendar Year End.pdf

Conflict Minerals Report 2017 Calendar Year End.pdf

…Starck Tungsten
Products Co., Ltd.
China
Tungsten Jiangxi Dayu Longxintai
Tungsten Co., Ltd.
China
Tungsten Jiangxi Gan Bei Tungsten Co.,
Ltd.
China
Tungsten Jiangxi Richsea New Materials
Co., Ltd.
China
Tungsten Jiangxi Tonggu Non-ferrous…

Fabrication and applications of holographic optical filters

Fabrication and applications of holographic optical filters

…package. A method for tuning the wavelength of the laser is presented
References:
[1] L. Hildebrandt et al, "Anti-reflection coated blue GaN laser diodes in an external cavity and Doppler free indium absorption spectroscopy ,"
Applied Optics., 42 (12) : 2110-2118, 2003
[2] H.…

SST 2017-09 Laser Marking.pdf

SST 2017-09 Laser Marking.pdf

16 AUGUST/SEPTEMBER 2017 SOLID STATE TECHNOLOGY www.solid-state.com
LASER MARKING
Organic
substrates
IC substrates or
interposers are
marked during
production with
traceable data
matrix codes.
The thin green
solder resist
layer on top of…