US PATENT SUBCLASS 257 / 309
.~.~.~.~ With increased effective electrode surface area (e.g., tortuous path, corrugated, or textured electrodes)

Current as of: June, 1999
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257 /   HD   ACTIVE SOLID-STATE DEVICES (E.G., TRANSISTORS, SOLID-STATE DIODES)

213  DF  FIELD EFFECT DEVICE {6}
288  DF  .~ Having insulated electrode (e.g., MOSFET, MOS diode) {17}
296  DF  .~.~ Insulated gate capacitor or insulated gate transistor combined with capacitor (e.g., dynamic memory cell) {10}
306  DF  .~.~.~ Stacked capacitor {2}
309.~.~.~.~ With increased effective electrode surface area (e.g., tortuous path, corrugated, or textured electrodes)

DEFINITION

Classification: 257/309

With increased effective electrode surface area (e.g., tortuous path, corrugated, or textured electrodes):

(under subclass 306) Subject matter wherein a capacitor electrode has an increased effective surface relative to a flat capacitor plate, because of twists, turns, curves, corrugations, windings or other surface area increasing features of a capacitor electrode.