Since a prototype run a Gandhis workshop can finish in less than two weeks after the verification of the chip is done, the most time critical part for the hybrid production is the production of the beryllia substrates. 60 of these are already ordered, 74.6mm by 28.0mm bridge type as specified by Carl Haber for bridge type modules. These substrates can then even be used to make CAFE/ABC-hybrids if there are problems with the ABCD chips.
The chip is designed by W. Dabrowski, J. Kaplon et. al., CERN, whereas the hybrid is designed by O. Dorholt and B. Sundal, Oslo University.
The process used is the same as for the SCT128B hybrid (Check out the SCT128B pages.)
Preliminary drawings of the design per 18.August is found in the following postscript drawings. The files showing layout is in scale 3:1. The insulation layers are not shown. COMMENTS ARE WELCOME. So far all planes are hatched. I will do some calculations on the resistance to verify whether i can keep all these hatced, or if I should make some of it full planes. Most components are 0603 size, whereas a few are 1206.
NB: Those having problems in viewing/printing these postscript figures should remove the 2-3 first lines in the postscript files, so that the first line is a line containing PS-Adobe. If you need to remove these lines you will probably also have to delete the last line in the file.
Please, comment to : B.Sundal, sundal@fys.uio.no Last edit: 18. August 1997.