| 摘要 |
PURPOSE:To enable manufacture of a long-sized heating substrate for a telefacsimile or the like in the stage of irradiating laser light on the surface of a work and forming a cutting line by inclining adequately the angle of the irradiation thereby obtaining the cutting surface square to the surface of the work. CONSTITUTION:Laser light 23 is irradiated to a ceramic material 20 with an inclination of, for example, about 15 deg. to the material 20 side in the stage of butting short substrates and manufacturing a long-sized heating substrate for a telefacsimile or the like. The material 20 is then divided always at the line III-VI-IV and a molten deposit 15 does not project from the surface VI-IV square to the material 20, thus the material is divided to an effective material 20 and an ineffective material 20'. Therefore if the effective materials 20 are butted on each other, the space-less surface M is obtd. irrespectively of the presence of the deposit 15, whereby the long-sized material is formed. |
