This unit is designed to paste solid getter sheets onto
a cover glass with engraved cavities. The cover glass
is loaded into the getter mounting unit and is received
by lifting pins. Prior to getter mounting the cover glass
is aligned in x-y direction and fixed to the stage by
vacuum suction. The getter sheets are picked up from the
reel whereas one pasting head can handle three getter
sheets at once. Two getter heads accomplish the pasting
– in case one head is down the other can cover the
entire cover glass area. After pasting a ‘control
and retry‘ software checks if each cavity contains
a getter sheet. In case getter sheets are missing additional
sheets are picked up and pasted into the empty cavities.
Getter reels are transferred into the enclosure by means
of the main antechamber and are mounted replaced manually.
The Getter Mounting Unit has the following system features:
•
Pasting
heads (each head can pick up 3 sheets at once) –
flat type and curved type available
•
Stepping
motor to move pasting heads
•
Cylinder
drive for vertical pasting head movement
•
Repeatability
of sheet mounting < ± 2,0 mm
•
x-y-stage
(aluminum, servomotor drive, anti-adhesion surface,
lead pitch of 20 [mm], 600 [mm/s] maximum speed;
glass fixation by vacuum suction 600 [mbar]
•
-stage
(rotation 0° to 90°; cylinder drive, tilt
adjustment function)
•
glass
delivery utilizing lift pins with cylinder drive
•
alignment
by pushing with cylinder drive driven pins (Teflon)
to standard fixed pins (stainless steel 1.4125);
pressure is adjustable
-stage
(rotation 0° to 90°; cylinder drive, tilt
adjustment function)