Automatic sensing wafer blade and method for using

Details Automatic sensing wafer blade and method for using Automatic sensing wafer blade and method for using

2005-05-24

2005-05-24

Kramer, Dean J. (Department: 3652)

Handling: hand and hoist-line implements

Utilizing fluid pressure

Venturi effect

C294S907000, C414S941000, C901S040000, C901S046000

Reexamination Certificate

active

06896304

ABSTRACT:
An automatic sensing wafer blade for picking up wafers that is equipped with a sensor capable of self-diagnosing potential failure conditions of the blade and a method for using the wafer blade are described. The automatic sensing wafer blade is equipped with a V-shaped seal ring on a top surface, and a sensor of either a limit switch or a capacitance sensor for sensing the presence or absence of a wafer on top of the wafer blade. The automatic sensing wafer blade is further capable of self-diagnosing any potential failure conditions of the function of the wafer blade due to contaminating particles, or contaminating liquid on the wafer surface, or due to an aged or malfunctioning seal ring on top of the wafer blade.

REFERENCES:
patent: 3154306 (1964-10-01), Elliott et al.
patent: 3272549 (1966-09-01), Nisula
patent: 5192070 (1993-03-01), Nagai et al.
patent: 6199927 (2001-03-01), Shamlou et al.
patent: 6279976 (2001-08-01), Ball
patent: 6517130 (2003-02-01), Donoso et al.

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