  Quantum technologies are advancing from fundamental research in specialized
laboratories to practical applications in the field, driving the demand for
robust, scalable, and reproducible system integration techniques. Ceramic
components can be pivotal thanks to high stiffness, low thermal expansion, and
excellent dimensional stability under thermal stress. We explore
lithography-based additive manufacturing of technical ceramics especially for
miniaturized physics packages and electro-optical systems. This approach
enables functional systems with precisely manufactured, intricate structures
and high mechanical stability while minimizing size and weight. It facilitates
rapid prototyping, simplifies fabrication and leads to highly integrated,
reliable devices. As an electrical insulator with low outgassing and high
temperature stability, printed technical ceramics such as Al2O3 and AlN bridge
a technology gap in quantum technology and offer advantages over other
printable materials. We demonstrate this potential with CerAMRef, a
micro-integrated rubidium D2 line optical frequency reference on a printed
Al2O3 micro-optical bench and housing. The frequency instability of the
reference is comparable to laboratory setups while the volume of the integrated
spectroscopy setup is only 6 ml. We identify potential for future applications
in compact atomic magnetometers, miniaturized optical atom traps, and vacuum
system integration.
