Electro Scientific Industries, Inc.

Yasu Osako

Hisashi Matsumoto

Daragh Finn

Mark Alan Unrath

Mark Kosmowski

Yunlong Sun

Kelly Bruland

Glenn Simenson

William J Jordens

David Barsic

Peter Pirogovsky

Xiaoyuan Peng

James N O'Brien

Weisheng Lei

Lynn Sheehan

Andrew Edwin Hooper

John Davignon

Jim Dumestre

Jeffery A Albelo

Systems and methods for laser processing continuously moving sheet material include one or more laser processing heads configured to illuminate the moving sheet material with one or more laser beams. The sheet material may include, for example, an optical film continuously moving from a first roller to a second roller during a laser process. In one embodiment, a vacuum chuck is configured to removably affix a first portion of the moving sheet material thereto. The vacuum chuck controls a velocity of the moving sheet material as the first portion is processed by the one or more laser beams. In one embodiment, a conveyor includes a plurality of vacuum chucks configured to successively affix to different portions of the sheet material during laser processing.

Methods and systems for laser processing continuously moving sheet material

A process to cut sheet material using a laser is improved by performing a first plurality of routings using a first toolpath for the laser and performing at least a second routing using a second toolpath for the laser after performing the first plurality of routings using the first toolpath, the second toolpath traverse from a kerf formed by the laser as a result of performing the first plurality of routings. A z-height shift can be simultaneously implemented with the transverse shift. By shifting the toolpath, interference of plasma generated during laser processing is minimized by maximizing the coupling of the laser and the material, resulting in less discoloration and/or burning of the material.

Minimizing thermal effect during material removal using a laser

An improved method for singulation of electronic substrates into dice uses a laser to first form cuts in the substrate and then chamfers the edges of the cuts by altering the laser parameters. The chamfers increase die break strength by reducing the residual damage and removes debris caused by the initial laser cut without requiring additional process steps, additional equipment or consumable supplies.

Method and apparatus for laser singulation of brittle materials

An improved method for singulation of compound electronic devices is presented. Compound electronic devices are manufactured by combining two or more substrates into an assembly containing multiple devices. Presented are methods for singulation of compound electronic devices using laser processing. The methods presented provide fewer defects such as cracking or chipping of the substrates while minimizing the width of the kerf and maintaining system throughput.

Method for laser singulation of chip scale packages on glass substrates

Tailored laser pulse shapes are used for processing workpieces. Laser dicing of semiconductor device wafers on die-attach film (DAF), for example, may use different tailored laser pulse shapes for scribing device layers down to a semiconductor substrate, dicing the semiconductor substrate, cutting the underlying DAF, and/or post processing of the upper die edges to increase die break strength. Different mono-shape laser pulse trains may be used for respective recipe steps or passes of a laser beam over a scribe line. In another embodiment, scribing a semiconductor device wafer includes only a single pass of a laser beam along a scribe line using a mixed-shape laser pulse train that includes at least two laser pulses that are different than one another. In addition, or in other embodiments, one or more tailored pulse shapes may be selected and provided to the workpiece on-the-fly. The selection may be based on sensor feedback.

Methods and systems for laser processing a workpiece using a plurality of tailored laser pulse shapes

Methods of manufacturing a panel and resulting panels include a plurality of microholes arranged in a pattern and filled with light transmissive polymeric material. The light transmissive polymeric material occludes the microholes and is set, or cured, by exposure to an energy source using at least two discrete exposure periods separated by an idle or rest period.

Method of manufacturing a panel with occluded microholes

Systems and methods generate laser pulse trains for material processing. In one embodiment, stable laser pulse trains at high repetition rates are generated from a continuous wave (CW) or quasi-CW laser beams. One or more laser pulses in the laser pulse train may be shaped to control energy delivered to a target material. In another embodiment, multiple laser beams are distributed to multiple processing heads from a single laser pulse, CW laser beam, or quasi-CW laser beam. In one such embodiment, a single optical deflector distributes multiple laser beams among respective processing heads.

Methods and systems for generating pulse trains for material processing

Dual-beam laser outputs, preferably derived from a single laser beam, improve the quality of the sidewalls of vias drilled in a target material, such as printed circuit board, comprising fiber-reinforced resin. Two embodiments each use two laser output components to remove a portion of target material from a target material location of a workpiece and rapidly clean remnants of the target material bonded to a metal layer underlying the target material location at a material removal rate. A first embodiment entails directing for incidence on a portion of the target material at the target material location a processing laser output having first and second components characterized by respective first and second wavelengths. A second embodiment entails directing for incidence on a portion of the target material at the target material location a processing laser output having first and second components characterized by respective first and pulse widths.

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Lake Oswego, OR, United States of America

Yasu Osako