Damage and wear detection for rotary cutting blades

Details Damage and wear detection for rotary cutting blades Damage and wear detection for rotary cutting blades

2007-10-23

2009-02-24

Stafira, Michael P (Department: 2886)

Optics: measuring and testing

Inspection of flaws or impurities

C451S006000

Reexamination Certificate

active

07495759

ABSTRACT:
A method of detecting wear and damage to a rotary cutting blade for singulating a substrate is provided comprising the steps of providing a sensor to locate a first detecting position at an edge of the blade and performing dicing with the blade while the sensor is maintained substantially at the first detecting position for detecting damage to the blade. Subsequently, an extent of wear of the blade is determined by driving the sensor in the direction of the blade to locate a second detecting position at the edge of the blade as a diameter of the blade is reduced due to dicing. Thereafter, while dicing is performed with the blade, the sensor is maintained substantially at the second detecting position for detecting damage to the blade.

REFERENCES:
patent: 6552811 (2003-04-01), Hayashi
patent: 2003/0073382 (2003-04-01), Manor
patent: 2006-287111 (2006-10-01), None

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