Abstract
A process design kit (PDK) or Technology Design kit (TDK) is
a set of files which describes manufacturing parameters that are relevant
for the designers (fabrication layers, electrical parameters and design
rules) for a certain technology of a given foundry. PDKs customize
CAD/EDA tools used by designers, providing enough abstraction of technological
details to facilitate the design of (organic electronics) circuits.
Design rules are a set of geometric restrictions imposed to the different
layers fabricated by the foundry that designers have to respect. By
taking the geometric design rules into account, the design engineers
address physical layout to develop devices and circuits without the
need of a deep knowledge of process and materials. These rules guarantee
their manufacturability and enable working circuits with an optimal
balance of yield versus integration density. Design rules for inkjet
printing are similar to general design rules for photolithographic
processes but also need to cope with the failures related to additive
printing of inks and related curing. In this paper, parameterizable
cells (PCells) have been used to automate the generation of a complete
set of structures to formalize and arrive at technology-independent
design rules. A set of test vehicles has been designed, printed and
characterized demonstrating the methodology to comprehensively capture
the design criteria for inkjet printing technology. For improving
design rules and scaling down device dimensions, we present a design
approach that combines pre-patterned, high-resolution substrates with
digital inkjet fabrication as a demonstration of the capabilities
of combining inkjet with other fabrication technologies.
© 2015 IEEE
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