  This paper introduces a new method of paper circuit fabrication that
overcomes design barriers and increases flexibility in circuit design.
Conventional circuit boards rely on thin traces, which limits the complexity
and accuracy when applied to paper circuits. To address this issue, we propose
a method that uses large conductive zones in paper circuits and performs
subtractive processing during their fabrication. This approach eliminates
design barriers and allows for more flexibility in circuit design. We introduce
PaperCAD, a software tool that simplifies the design process by converting
traditional circuit design to paper circuit design. We demonstrate our
technique by creating two paper circuit boards. Our approach has the potential
to promote the development of new applications for paper circuits.
