DYNAMIC OPTICAL VALVE FOR MITIGATING NON-UNIFORM HEATING IN LASER PROCESSING

Embodiments of the present invention generally relate to an optical valve that modifies a laser beam to allow more energy to be irradiated onto less absorbing areas on a substrate and less energy to be irradiated onto more absorbing areas on the substrate, thus creating a more uniform heating field....

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Bibliographische Detailangaben
1. Verfasser:	ADAMS BRUCE E
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRICITY FREQUENCY-CHANGING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PERFORMING OPERATIONS PHYSICS SEMICONDUCTOR DEVICES SOLDERING OR UNSOLDERING TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	Embodiments of the present invention generally relate to an optical valve that modifies a laser beam to allow more energy to be irradiated onto less absorbing areas on a substrate and less energy to be irradiated onto more absorbing areas on the substrate, thus creating a more uniform heating field. The optical valve is a layered structure comprising a reflective switch layer, an absorbing layer, a thermal resistor and a thermal bath.