Patent
Use of multiple laser sources for rapid, flexible machining and production of vias in multi-layered substrates
Roy D. Mead,Jeffrey W. Pierce +1 more
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In this paper, a laser via drilling system, and a method of use thereof, is provided, where the output beams from the independently controlled laser systems are combined using a beam splitter that combines the beams into single or multiple processing beams.Abstract:
A laser via drilling system, and a method of use thereof, is provided. The apparatus uses two or more laser systems to achieve processing parameter flexibility. The output beams from the independently controlled laser systems are combined using a beam splitter that combines the beams into single or multiple processing beams. The operational flexibility of the system can be further enhanced through the use of multiple EO modulators and a polarization sensitive beam splitter.read more
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Patent
Polarisation optical combination of pulsed laser diodes with a time-offset for improving the performance of a laser beam
TL;DR: In this paper, a method and a device for producing a laser beam of high brilliance, using laser diodes as the laser source, in particular for machining materials was described.
Patent
Method for increasing throughput of solder mask removal by minimizing the number of cleaning pulses
TL;DR: In this paper, an oscillator module in cooperation with an amplification module is used to generate the laser output, which can be used to clean a bottom surface of a via or the surface of an solder pad to increase process throughput.
Patent
Method and device for the punctiform machining of a workpiece by means of a laser beam
TL;DR: In this article, two laser beams with temporally offset pulse sequences are respectively guided through an intrinsic deviation unit, are oriented in the same direction by means of a rotating chopper disk having light-permeable and reflecting segments, and are supplied towards the workpiece via a common lens.
Patent
Laser processing device and laser processing method
TL;DR: In this paper, the authors proposed a laser processing device which carries out laser processing to a workpiece under a sufficient output by forming two focal points, where the respective laser beams are focused on different focal points 11, 12 by utilizing a difference of focal depths due to the difference of refractive indexes of the first laser beam LB1 and the second laser beamLB2.
Patent
Laser device for drilling holes in components of a fluid injection device
Ulrich Dürr,Bruno Frei +1 more
TL;DR: In this paper, a laser machining device is provided for drilling holes in components of a fluid injection device, particularly for injecting fuel into a combustion engine, and a laser resonator is formed by an optically pumped diode laser solid state active medium.
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Patent
Ultraviolet laser system and method for forming vias in multi-layered targets
Mark D. Owen,James N. O'brien +1 more
TL;DR: In this paper, the output of a continuously pumped, Q-switched, Nd:YAG laser (10) is frequency converted to provide ultraviolet light for forming vias (72, 74) in multi-layered targets (40).
Patent
Method employing UV laser pulses of varied energy density to form depthwise self-limiting blind vias in multilayered targets
TL;DR: In this article, the output of a continuously pumped, Q-switched, Nd:YAG laser is converted to provide ultraviolet light for forming vias in targets (40) having metallic layers (64,68) and a dielectric layer (66).
Patent
Dental procedures and apparatus using ultraviolet radiation
TL;DR: In this paper, the authors proposed an improved dental procedure and apparatus where ultraviolet radiation pulses are used to etch selectively both hard tissue and soft tissue in dental procedures, where there exists distinct ablation thresholds for hard and soft tissues which are dependent on the material being ablated for a given wavelength of the ultraviolet radiation.
Patent
Low cost, high average power, high brightness solid state laser
TL;DR: In this article, a seed laser beam with a short pulse duration was used to produce a high average power, high brightness solid state laser system, where a laser amplifier (24) amplifies the seed beam to produce an amplified pulse laser beam which is tightly focused to produce pulses with brightness levels in excess of 1011 Watts/cm2.
Patent
Laser system and method for plating vias
TL;DR: The output of a continuously pumped, Q-switched, Nd:YAG laser is frequency converted to provide ultraviolet light for plating internal wall surfaces (79, 126) of vias in multilayered electronic devices as mentioned in this paper.