Patent ID: 9566663
Date: 2017-02-14
CPC Classifications: B23K,B29C

Claim:
1. A half-cut laser beam processing method for processing a work made of a polymer material using a laser beam, the method comprising: partially cutting the work by irradiating the work with a laser beam in a state that the optical axis of the laser beam is tilted in an opposite direction to the advancing direction of the work by a prescribed angle with respect to the vertical direction of the work such that the laser beam is tilted toward a cutting surface of the work, and the angle between the optical axis of the laser beam and the vertical direction of the work is in the range of 20 to 45°; wherein the processing method is a half cut method, and the work is an optical film, and the optical film is installed in a liquid crystal display device; wherein the laser beam is a Gaussian beam having a rectangular profile; wherein polymer material decomposes to form a gas upon irradiation with the laser beam, and a second portion of the polymer material melts without decomposing upon irradiation with the laser beam, and a maximum height of a raised portion of the second portion of the polymer material that is extruded to an outside of a cut portion after the cut processing is 30 μm or less; and wherein the gas diffuses in a direction opposite to the advancing direction of the work.