Original Publication Date: 1980-May-01
Included in the Prior Art Database: 2005-Feb-13
It is proposed that control lines be placed underneath the base electrode of a "holey" interferometer in order to reduce the device area. In particular, a two-control line interferometer can be constructed with one control line below the base electrode, and one above, thus approximately halving the total area of the base electrode. Furthermore, parasitic capacitances are reduced because the base electrode is narrower. Groundplaned planar interferometers require that control lines 10 run above the base electrode 12 to achieve good control current coupling. The minimum width of the device is determined by the minimum linewidth and spacing of the control lines. For example, the standard two-control line interferometer typically requires a base electrode which is five minimum linewidths wide, as shown in Fig. 1.