Abstract:
Eine Fügevorrichtung (14) für ein Stoffschlüssiges Fügen mittels eines Zusatzwerkstoffs (18) hat eine Zuführeinrichtung für einen Draht (18) als Zusatzwerkstoff, die ausgebildet ist, den Draht (18) im Betrieb der Fügevorrichtung (14) mit vorgegebener Vorschubgeschwindigkeit zuzuführen, und eine Leiteinrichtung (21) für einen Energiestrahl mit mindestens zwei Teilstrahlen (26) zum Schmelzen des Drahtes (18). Die Fügevorrichtung (14) weist einen ersten Messaufnehmer zum Erfassen einer lateralen Auslenkung des Drahtes (18) sowie einen zweiten Messaufnehmer zum Erfassen einer mit dem Vorschub des Drahtes (18) verbundenen Größe auf, wobei die Leiteinrichtung (21) für den Energiestrahl mit dem ersten und dem zweiten Messaufnehmer verbunden und derart konfiguriert ist, dass der Energiestrahl in Abhängigkeit von Ausgangssignalen des ersten und des zweiten Messaufnehmers ausgelenkt und/oder fokussiert wird.
Abstract:
Multiple beamlet laser beam delivery systems and methods may be used in laser machining systems and methods to machine multiple regions on a workpiece simultaneously. One embodiment of a laser machining system and method may be used, for example, to scribe one or more lines in large flat workpieces such as solar panels. In particular, laser machining systems and methods may be used to scribe lines in thin film photovoltaic (PV) solar panels with accuracy, high speed and reduced cost. The multiple beam delivery systems may be movable to scribe multiple lines simultaneously in the workpiece.
Abstract:
Bei einer Laserbearbeitungsmaschine (10) mit einer Tragstruktur (13), an deren einer Seite zumindest ein Laserbearbeitungskopf (17, 18) angeordnet ist, sowie einer Werkstückhalterung und/oder Werkstückauflage (11), wobei der Laserbearbeitungskopf (17, 18) und die Werkstückhalterung und/oder Werkstückauflage (11) relativ zueinander bewegbar sind, ist auf zwei gegenüber liegenden Seiten der Tragstruktur (13) zumindest ein Laserbearbeitungskopf (17, 18) angeordnet und dass eine Strahlweiche vorgesehen ist, durch die ein Laserstrahl zwischen Laserbearbeitungsköpfen umschaltbar ist. Dadurch lässt sich der Arbeitsbereich vergrößern.
Abstract:
An output beam (16) from a laser (12) is directed into an acousto-optic cell (22). The laser beam (16) includes repeated sequences of two or more pulses. The acousto-optic cell (22) is sequentially driven by RF voltages at two or more frequencies. A portion of the laser output beam is diffracted by the acousto-optic cell (22) at two or more different angles to the laser output beam. This provides two or more secondary beams. One of the secondary beams includes only the first pulses of the sequences; the other includes only the second pulses of the sequences. The duration of the pulses in the laser beam (16) is controlled to control time-averaged power in the secondary beams.
Abstract:
Disclosed are a laser processing apparatus and method that can effectively remove a low-k material formed on a wafer. A laser processing apparatus of the invention is a laser processing apparatus that processes a subject on which a low-k material is formed. The laser processing apparatus includes a laser generating unit that emits a laser beam; and an optical system that splits the laser beam emitted from the laser generating unit into two and irradiates the split laser beams onto the subject In this case, the optical system includes a pair of condensing lenses in which cut surfaces that are cut at a predetermined distance from central axes to be parallel to the central axes contact with each other, and the interval between the two split laser beams is the same as the interval between two edges of the low-k material in a removal subject region. According to the invention, after splitting a laser beam into two laser beams and primarily removing the edges of the low-k material in the removal subject region using the laser beams, the remaining low-k material between the edges is removed. As a result, it is possible to improve processing quality.
Abstract:
Provided is a method of dividing marking objects in which the marking objects are divided so that some of the marking objects including a characteristic or figure to be marked are marked using a first laser beam and other remaining marking objects are marked using a second laser beam. The method includes: dividing a predetermined marking region into a first sub-marking region on which the first laser beam is used and a second sub-marking region on which the second laser beam is used; calculating respective estimated marking times taken to mark the marking objects; adding estimated marking times taken to mark marking objects included in the first sub-marking region and adding estimated marking times to mark marking objects included in the second sub-marking region; calculating a half value of a difference between a total value of the estimated marking times of the first sub-marking region and a total value of the estimated marking times of the second sub-marking region; selecting a marking object having an estimated marking time that is the same as or similar to the half value from among marking objects included in a sub-marking region corresponding to one of the first and second sub-marking regions, depending on which has the greater total estimated marking time value; and marking the selected marking object by using a laser beam different to that used for the sub-marking region including the selected marking object.
Abstract:
Disclosed is a laser processing device for processing a surface of an object with laser beams. The laser processing device includes: a laser beam generating unit for projecting laser beams; and a micromirror device having a plurality of micromirrors, the micromirrors being configured to reflect and transfer at least a part of laser beams projected from the laser beam generating unit to the surface of the object in a pattern for processing the surface of the object in a desired shape. The micromirrors of the micromirror device are capable of selectively switching the light path of the laser beams projected from the laser beam generating unit. According to the present invention, a surface of an object can be either two-dimensionally or three-dimensionally processed in a desired shape with laser beams.
Abstract:
The present invention provides a system and method for delivering laser beam, and a laser lift-off (LLO) method, one of the inevitable processes for fabricating a vertical type LED. A laser beam delivery system of the present invention comprises a laser beam source for emitting laser beam; a beam homogenizer for improving uniformity of energy intensity of the laser beam, the beam homogenizer comprising a microlens type fly-eye lens; a mask for masking a peripheral area of a cross section of the laser beam having penetrated the beam homogenizer at a focal plane; and an imaging lens for applying the laser beam to a unit irradiation area of a target. According to the present invention, the uniformity of energy intensity all over the beam spot is improved and thus the process yield is also remarkably increased. Besides, the beam transmittance is improved and thus the production per unit time is also raised. Further, the manufacturing process is simplified, the manufacturing cost is reduced, and thus the competitive power in LED market is improved.
Abstract:
The present invention relates to a process of joining a first metal component (4) to a second metal component at a joining region comprising the steps of projecting a laser beam (3) onto one or the components for providing a melt pool on the joining region; providing a metal filler wire (2) into the melt pool while substantially simultaneously providing a substantially laminar flow of a substantially inert process shielding gas to the location of the melt pool wherein the process shielding gas flows substantially coaxially around the filler wire (2); solidifying the melt pool thereby forming a joint at the joining.