Machine element or mechanism – Control lever and linkage systems – Elements
Patent
1997-09-03
1999-10-26
Luong, Vinh T.
Machine element or mechanism
Control lever and linkage systems
Elements
414936, 29 2501, G05G 104, B65G 4907, B21F 4100
Patent
active
059708182
ABSTRACT:
A notch alignment apparatus has a unit body (15), which can advance into a carrier (3) through a bottom opening (4) of the carrier (3), for aligning notches (2) formed in the peripheral edges of semiconductor wafers (1), which are contained in the carrier (3) and arrayed in a facing state. The unit body (15) is provided with a rotationally driving shaft (25) having a cylindrical shape, for coming into contact with the peripheral edges of the wafers (1) from below and driving the wafers (1) to rotate all together. A plurality of idle pulleys (26) independent of each other are arranged on one side of the driving shaft (25), for coming into contact with the peripheral edges of the wafers (1) from below. The idle pulleys (26) are supported by a common pulley shaft (27) to be independently and freely rotatable. A stopper or wafer guide (28) is arranged on the other side of the driving shaft (25), for stopping rotation of the wafers (1) by means of contact with the peripheral edges of the wafers (1). The stopper (28) is arranged such that the peripheral edge of each wafer (1) comes into contact with the stopper (28) when that the wafer (1) engages with the driving shaft (25) by its notch (2) and inclines. The driving shaft (25) and the pulley shaft (27) are driven to rotate along with each other in the same direction.
REFERENCES:
patent: 4051593 (1977-10-01), Mori et al.
patent: 4378189 (1983-03-01), Takeshita et al.
patent: 5007302 (1991-04-01), Chen
patent: 5685039 (1997-11-01), Hamada et al.
Kikuchi Hisashi
Obara Mitsuru
Luong Vinh T.
Tokyo Electron Limited
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