Glass substrate chamfering method and apparatus

  • US 6,341,999 B1
  • Filed: 09/26/2000
  • Issued: 01/29/2002
  • Est. Priority Date: 09/30/1999
  • Status: Expired due to Fees
First Claim
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1. A method of chamfering surfaces of a doughnut-shaped glass substrate having a circular center hole, the method of chamfering a glass substrate comprising:

  • providing a doughnut-shaped glass substrate having an end surface, a circular center hole, and an oblique surface of each of an outer periphery and an inner periphery, respectively;

    positioning the glass substrate for processing;

    processing the glass substrate by grinding, wherein a metal-bonded outer-surface grindstone processes the end surface and the oblique surface of the outer periphery and a metal-bonded inner-surface grindstone simultaneously processes the end surface and the oblique surface of the inner periphery;

    electrolytically dressing and sharpening the outer-surface grindstone during a processing period;

    electrolytically dressing and sharpening the inner-surface grindstone during a non-processing period; and

    replacing the glass substrate during the non-processing period with another doughnut-shaped glass substrate having an end surface, a circular center hole, and an oblique surface of each of an outer periphery and an inner periphery, respectively.

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