Patent ID: 7204664

Claim:
A method for drilling glass comprising: (a) providing a drill; (b) providing a drill bit comprising: (i) a first shaft having a circular cross-section of a first diameter; (ii) a tapered tip coupled to said first shaft; (iii) a second shaft having a circular cross-section of a second diameter, said second shaft being coupled to said first shaft; (iv) a third shaft having a circular cross-section of a third diameter, said third shaft being coupled to said second shaft; (v) wherein said second shaft is coupled between said first shaft and said third shaft; (vi) wherein said first diameter is greater than said second diameter; (vii) wherein said third diameter is greater than said second diameter; (viii) wherein said third diameter is greater than said first diameter; (ix) a first abrasive secured to said first shaft; (x) a second abrasive secured to said second shaft; and (xi) wherein said second abrasive is finer than said first abrasive. (c) coupling said drill bit to said drill; (d) providing a piece of glass; (e) rotating said drill bit; (f) drilling said drill bit into said glass until said first shaft and said second shaft cut a hole into said glass; (g) moving a fluid across said drill bit to remove glass as said drill bit is drilling; (h) providing a polishing bit; and (i) rotating said polishing bit in sufficient proximity to said hole to polish said hole.