Vacuum pencil having a short tip with an abutment means

Details Vacuum pencil having a short tip with an abutment means Vacuum pencil having a short tip with an abutment means

1995-05-10

1996-12-03

Cherry, Johnny D.

Handling: hand and hoist-line implements

Utilizing fluid pressure

Venturi effect

29743, B25J 1506

Patent

active

055801129

ABSTRACT:
The invention provides a vacuum pencil having an abutment pin which limits the distance the tip of the vacuum pencil can extend past the edge of a wafer thus reducing scratches on the device sides of adjacent wafers. The vacuum pencil has a relatively flat tip connected to a body. The tip has a flat top side for engaging a wafer. The top side of the tip has channels for delivering a vacuum to seal against the wafer against the tip. The top side of the tip also has an pin mounted between the channels and the body. A passage for delivering a vacuum runs through the body and the channel is connected to the channel in the tip. The pin can be a pentagon shaped pin which is about 1 mm high.

REFERENCES:
patent: 4002254 (1977-01-01), Olofsen
patent: 4037830 (1977-07-01), Poluzzi et al.
patent: 4496180 (1985-01-01), Hillman et al.
patent: 4767142 (1988-08-01), Takahashi et al.
patent: 4981315 (1991-01-01), Poli et al.
patent: 5195729 (1993-03-01), Thomas et al.
patent: 5280979 (1994-01-01), Poli et al.
patent: 5374090 (1994-12-01), Goff

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