Experimental Research On The Ceramic Substrate, Laser Processing Technology

Outstanding mechanical and physical properties like high thermal resistance, high hardness and chemical stability have encouraged use of ceramics in several applications. The brittle and hard nature of these ceramics makes them difficult to machine using conventional techniques and damage caused to the surface while machining affects efficiency of components. Laser machining has recently emerged as a potential technique for attaining high material removal rates. In thesis, a qualitative analysis and experimental verification of the effect of certain factors in relation to ceramics scribing is conducted, and take ultraviolet laser scribing as an example to analyze the effect of those processing parameter to the ceramics scribing, such as velocity, duty ratio, repeat frequency and off-focus offset. Laser machining ceramics is carried out by either direct vaporisation or assist gas ejection of laser-melted materials. For ceramics materials, due to the high viscosity of the materials in the molten state, it is difficult to achieve a clean cut. In order to improve this situation, this paper presents a method of attaching thin slab to the lower surface, and verifies it as a possible method by experiment.