
Main Subsystems
Advanced Dicing Technologies Ltd.
2.1-6
• Coaxial: Vertical illumination passing through the Microscope,
generally used on silicon Workpieces, which have reflective surfaces.
• Oblique: Surrounding illumination on the sides of the Microscope,
generally used on Ball Grid Array (BGA) or metal Workpieces, which
have diffusive surfaces.
Illumination of the Workpiece intensifies the display of each pixel viewed
using a range of 0-255, where 0 produces a very dark (black) display, and
255 produces a very light (white) display.
The 7100 Series machines can also be equipped with optional Halogen
illumination accessories for Coaxial or Oblique illumination (see also
Table 6-1).
2.1.3 Light Tower
The Light Tower indicates the status of the Model 7100. In general,
a green light indicates normal system operation, yellow light
indicates that there is a need of a user interference, while a red light
indicates that an error has occurred. The Light Tower indications
are given in
Table 2-1.
1 Oblique
2 Coaxial
Figure 2-6: Illumination Accessories Attached to the Microscope
1
2
Table 2-1: Light Tower States
Red Yellow Green System State
Med Flash Off Off Error.
Off Off Off The system is not initiated.
Off On Off The system is idle
Off Med Flash Off Process paused, operator call.
Off Off On The system is running in Auto mode
Off Off On Manual Operation
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