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User Manual SIPLACE HS-50 5 Station extensions Software Version SR.50x.xx 01/2006 US Edition 5.5 Ceramic substrate centering 163 5.5.5 Optical centering with oblique lighting 5.5.5.1 General For opt ical ce ntering, the …
5 Station extensions User Manual SIPLACE HS-50
5.5 Ceramic substrate centering Software Version SR.50x.xx 01/2006 US Edition
162
5.5.4 Technical data
Substrate format 50 mm x 50 mm to 100 mm x 180 mm
Substrate thickness 0.5 mm to 1.5 mm
Substrate model unscribed (without problems)
scribed (requires testing)
Support on the conveyor 2.5 mm
Optical centering with PCB vision module:
Type of illumination for light pastes:
Type of illumination for dark pastes and close spacing to
adjacent structures (> 1 mm)
with multi-color camera
PCB vision module (standard)
Oblique lighting (option)
4 illumination levels to be selected
Fiducial criteria See PCB vision module position recog-
nition
PCB underside clearance 12 mm
Compressed air connection 5.5 bar
User Manual SIPLACE HS-50 5 Station extensions
Software Version SR.50x.xx 01/2006 US Edition 5.5 Ceramic substrate centering
163
5.5.5 Optical centering with oblique lighting
5.5.5.1 General
For optical centering, the special features of the ceramic substrate must be taken into account.
The contrast depends very much on the paste used for the adjustment structure, the clear area
surrounding the adjustment structure, and the type of illumination.
The oblique lighting unit is located on the front part of the sub-gantry camera.
Fig. 5.5 - 2 Oblique lighting unit for the sub-gantry camera
Oblique lighting may be switched on instead of the existing lighting (see table in Section 5.5.2 on
page 160
).
PLEASE NOTE
Oblique lighting can only be used on the “sub-gantry camera”. 5
5 Station extensions User Manual SIPLACE HS-50
5.5 Ceramic substrate centering Software Version SR.50x.xx 01/2006 US Edition
164
5.5.5.2 Fiducial mark recommendation for ceramic substrates
The contrast between the carrier package material and the circuit-board conductor layer is gener-
ally very small with ceramic substrates. The fiducials must therefore be selected with regard to
certain criteria concerning the fiducial shape and structure. Recommended fiducial shapes and
structures are given below.
Fiducial shape 5
We recommend a rectangle or square with an edge length of > 1 mm, and a clearance
of > 0.5 mm.
Fig. 5.5 - 3 Recommended fiducial shape
PLEASE NOTE
Single crosses are also suitable, but they take up more space. 5
0.5 mm
1.0 mm