Method for cutting tempered glass

Abstract

A method for cutting a tempered glass including the steps of strengthening a glass substrate to form, from a surface to the inside of the glass substrate, at least one compression stress layer and a tensile stress layer corresponding to the compression stress layer; removing a part of the glass substrate, wherein the compression stress layer is formed in the part of the glass substrate and a predetermined cutting path passes through the part of the glass substrate; and cutting the glass substrate along the predetermined cutting path.

What is claimed is: 
     
         1 . A method for cutting a tempered glass, comprising the steps of:
 strengthening a glass substrate to form, from a surface to the inside of the glass substrate, at least one compression stress layer and a tensile stress layer corresponding to the compression stress layer;   removing a part of the glass substrate, wherein the compression stress layer is formed in the part of the glass substrate, and a predetermined cutting path passes through the part of the glass substrate; and   cutting the glass substrate along the predetermined cutting path.   
     
     
         2 . The method as claimed in  claim 1 , wherein the glass substrate is given an ion exchange glass strengthening treatment. 
     
     
         3 . The method as claimed in  claim 1 , wherein the part of the glass substrate is removed by etching or polishing. 
     
     
         4 . A method for cutting a tempered glass, comprising the steps of:
 strengthening a glass substrate by an ion exchange glass strengthening treatment to form, from a surface to the inside of the glass substrate, at least one compression stress layer and a tensile stress layer corresponding to the compression stress layer;   forming at least one trench on the glass substrate without splitting the glass substrate at a position overlapping the compression stress layer and a predetermined cutting path; and   cutting the glass substrate along the trench.   
     
     
         5 . A method for cutting a tempered glass, comprising the steps of:
 strengthening a glass substrate to form, from a surface to the inside of the glass substrate, at least one compression stress layer and a tensile stress layer corresponding to the compression stress layer;   forming at least one trench on the glass substrate and in the compression stress layer without splitting the glass substrate to remove a part of the compression stress layer and correspondingly reduce a tensile stress along the trench; and   forming a scribe line in the trench to initiate a cutting treatment and define a cutting path for the cutting treatment.   
     
     
         6 . The method as claimed in  claim 5 , wherein the glass substrate is given an ion exchange glass strengthening treatment. 
     
     
         7 . The method as claimed in  claim 5 , wherein the trench is formed by etching or polishing.