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11 Station extensions / hardware User Manual SIPLACE 80S- 20/F4 11.5 Ceramic substrate centering S oftware version SR.406.xx 02/2000 I ssue US 478 Fiducial s tructure 11 Recommenda tion 1 Fiduci al structu re Black resis…
User Manual SIPLACE 80S-20/F4 11 Station extensions / hardware
Software version SR.406.xx 02/2000 Issue US 11.5 Ceramic substrate centering
477
PLEASE NOTE
Oblique lighting can only be used on the “sub-gantry camera”. 11
11.5.5.2 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. 11
Fiducial shape 11
We recommend a rectangle or square with an edge length of > 1 mm, and a clearance
of > 0.5 mm. 11
11
Fig. 11.5 - 4 Recommended fiducial shape
PLEASE NOTE
Single crosses are also suitable, but they take up more space. 11
0.5 mm
1.0 mm
11 Station extensions / hardware User Manual SIPLACE 80S-20/F4
11.5 Ceramic substrate centering Software version SR.406.xx 02/2000 Issue US
478
Fiducial structure 11
Recommendation 1
Fiducial structure Black resistive paste as the background, with conductive paste printed on it as
the fiducial.
Recommendation Background 0.75 mm larger than the fiducial on all sides.
Method of illumination Normal light
Advantage Good contrast, good sharpness;
Reference Circuit-board conductor layer
Assessment This combination gives the best results. Highly recommended.
Recommendation 2
Fiducial structure Fiducial made from circuit-board conductor material, e.g. 6119, and overprinted
with passivated glass 4330.
Method of illumination Oblique light
Advantage No additional steps required
Reference Circuit-board conductor layer
Assessment Fiducials are less sharp than for recommendation 1. Recommended.
Recommendation 3
Fiducial structure Fiducials made from circuit-board conductor layer against a free ceramic back-
ground.
Method of illumination Oblique or normal light (depending on the paste)
Advantage No additional steps required
Reference Circuit-board conductor layer
Note Fiducials are less sharp than for recommendation 2.
The fiducial image depends on the surrounding free surface. It may be neces-
sary to teach every circuit separately.
Assessment Recommended under certain conditions.
User Manual SIPLACE 80S-20/F4 11 Station extensions / hardware
Software version SR.406.xx 02/2000 Issue US 11.6 Nozzle changer for the Pick&Place head
479
11.6 Nozzle changer for the Pick&Place head
11.6.1 Overview
11
Fig. 11.6 - 1 Mounting position of the nozzle changer for the Pick&Place head
(1) Magazine for 5 nozzles
(2) Reject bin
(3) Mounting plate