A method for scribing a brittle material substrate

Abstract

To provide a method for scribing a brittle material substrate, such as a glass substrate, on which a resin layer is formed according to which a scribe line can be created efficiently without fail. [Means for Achieving Object] A cutter wheel (10) with notches (15) having a blade surface with two parts: one part having a first blade surface (12) with a first ridgeline angle ( 1) between the left and right sides, the ridgeline being the outer periphery of the circular cutter wheel, and the other part having a second blade surface (13) that continues to the bottom of the first blade surface (12) on the left and right sides, where the first ridgeline angle ( 1) is appropriate for cutting a brittle material substrate and the second blade surface (13) has an angle appropriate for cutting the resin layer, is provided, and this cutter wheel (10) is rolled over and pressed against the upper surface of a resin layer (3) so that the resin layer (3) is cut by the second blade surface (13), and at the same time the blade ridgeline of the first blade surface (12) bites into the substrate so as to create a scribe line.

Description

Technical field [0001] The present invention relates to a scribing method for forming a scribe line (notch) on a brittle material substrate on which a coating layer coated with paint or resin is formed or a brittle material substrate on which a resin film layer is attached. [0002] In addition, the "resin layer" referred to in the following description includes not only a coating layer such as a resin film layer on the surface of the substrate, but also a coating layer coated with a paint or resin. Background technique [0003] When cutting a brittle material substrate such as glass, a scoring line is formed in advance along the predetermined breaking line. It is generally known that a knife wheel (also called a scoring wheel) is pressed against the surface of the substrate and is rotated. For example, it is disclosed in Patent Document 1 and the like. [0004] In order to form a scoring cutter wheel on the glass substrate, like Figure 4 The cutting edge ridge line 20 shown is proc...

AI Technical Summary

Problems solved by technology

If you choose a cutter wheel with a ridgeline angle smaller than 90 degrees, the scoring groove will not be formed when the load is light, and the scoring groove will not be formed when the load is heavy, and it will suddenly crack in an irregular direction or produce horizontal cracks. In other cases, it is difficult to form a scribed groove smoothly

[0006] Conversely, if the cutter wheel with a large blade front edge ridgeline angle (blade angle 100-160 degrees) is rotated against a glass substrate with a resin layer formed on the surface, the force that the part of the blade front edge is pressed in the vertical direction is not only to the substrate , Also, if the resin layer becomes too large, a part of the resin layer that contacts the leading edge of the blade will be torn irregularly

[0007] Therefore, the glass substrate on which the resin layer is formed cannot be scribed using a general glass cutter wheel.

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