Method for manufacturing a substantially circular substrate by utilizing scribing

A method for forming a substantially circular substrate from a workpiece, comprising:

• rotating the workpiece;
• scribing both sides of the workpiece by forming scribe lines on upper and lower surfaces of said workpiece by using a first and a second scribing tool, said scribe line on said upper surface being aligned with the scribe line on said lower surface,
• and breaking said workpiece along said scribe lines on said upper and lower surfaces;
• wherein said first scribing tool forms the first scribe line that defines an inner diameter of said substrate, and said second scribing tool forms the second scribe line that defines an outer diameter of said substrate.

A method for forming a substantially circular substrate from a workpiece wherein said workpiece has first and second major surfaces, comprising:

• applying a first scribing tool to said first major surface of the workpiece;
• and rotating said first scribing tool during said applying to thereby form a substantially circular first scribe line,
• further applying a second scribing tool to said second major surface of the workpiece;
• and rotating said second scribing tool during said applying to thereby form a substantially circular second scribe line,
• and further comprising the act of breaking said workpiece along said first and second scribe lines,
• wherein said first scribing tool forms the first scribe line that defines an inner diameter of said substrate, and said second scribing tool forms the second scribe line that defines an outer diameter of said substrate.