Markets / Materials Processing / Laser Microprocessing

Laser Microprocessing

CO2 Laser Microprocessing

Growth in the OLED and consumer electronics industry has fueled the adoption of lasers used for semiconductor material processing. Micro-machining applications like cutting, marking, engraving and via-hole drilling require precision laser optics designed to meet the diverse power levels, laser types and wavelengths associated with such systems.

II-VI offers a full suite of precision laser optics covering the UV to IR spectrum. This includes cylinders, galvo mirrors, windows, band-select optics and multi-band coatings. II-VI offers robust coatings are ideal for applications where frequent cleaning is needed due to spatter and debris adhering to optical surfaces. Customers can also leverage II-VI’s solutions for passive thermal management using reaction bonded silicon carbide (RB SiC) materials, thermal grade CVD diamond and active thermal management solutions with thermoelectric modules.

CO Laser Microprocessing

Carbon monoxide (CO) lasers are emerging as the tool of choice in glass cutting in consumer electronics, micro-via drilling for microelectronics and in additive manufacturing. The lasers’ five micron operating wavelength facilitates the absorption of laser energy in glass, enabling curved cutting and micro-drilling in glass panels.

II-VI offers a complete line of CO laser products, including scan lenses, scanning mirrors, and protective windows. II-VI also developed a proprietary housing design to seal scan lenses and achieve very high transmission at five micron wavelength.

Ultraviolet Laser Microprocessing

Ultraviolet (UV) lasers are employed in a broad range of microprocessing applications including in scribing and dicing semiconductor devices, micro-via drilling printed circuit boards and flexible circuits, manufacturing solar cells, and glass machining. UV lasers are also used in the manufacturing process for organic light emitting diodes (OLED) which are increasingly finding their way into consumer electronics, including in smart phones and monitors. Typically, UV lasers are diode pumped solid state lasers (DPSS) for which the wavelength is converted in one or two steps using appropriate non-linear crystals such as LBO or BBO.

II-VI’s broad portfolio of products for UV DPSS lasers includes non-linear crystals, laser cavity optics and acousto-optic Q-switching. II-VI also offers products for UV beam delivery systems, including f-theta scan lenses, scan mirrors, focusing lenses and beam expanders.

Ultrafast Laser Microprocessing

Ultrafast picosecond and femtosecond lasers continue to be deployed in large numbers for high precision marking and micromachining applications. These lasers produce pulses of high energy in a very short amount of time. These pulses greatly minimize the undesired effects of heat on the work piece. Ultrafast lasers are ideal tools for cutting and dicing brittle material like semiconductors, glass for consumer products and for machining delicate or heat sensitive materials for industrial, medical and other applications. Optimal laser power, pulse compression, and reliability can be achieved with the proper selection of semiconductor lasers, specialized optics and thermal management solutions.

II-VI’s portfolio of semiconductor lasers for ultrafast lasers includes pump diodes and modules, as well as single mode seed laser modules for master oscillator power amplifier (MOPA) laser designs. II-VI also offers a portfolio of optics and modules specially designed for specific pulsed laser functions. These products include gratings for pulse compression, group delay dispersion (GDD) optics, and pulse pickers. Customers can also leverage II-VI’s solutions for passive thermal management using reaction bonded silicon carbide (RB SiC) materials, thermal grade CVD diamond and active thermal management solutions with thermoelectric modules.