Browse Prior Art Database

Capacitor with Minimal Area

IP.com Disclosure Number: IPCOM000114281D
Original Publication Date: 1994-Dec-01
Included in the Prior Art Database: 2005-Mar-28
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Haberle, H: AUTHOR

Abstract

A relatively soft tip is pressed into the surface of a harder material. The deformed tip is then retracted and kept constantly at a distance of a few nanometer above the surface. The distance is preferably controlled by a feedback loop. The feedback loop and all devices necessary to build the capacitor is taken from standard Scanning Tunneling Microscopy (STM) or Atomic Force Microscopy. In very stable, vibration-free environments, a feedback loop might be unnecessary. The device can be used for example as gravity wave detector or any other application where a large capacitance is required within a small volume. Fig. 1 shows an experimental setup with a 35 pF capacitance with an area of approximately 10 adjust (up 3 r .5) -12 ' m' adjust (up 3 r .5) 2.

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Capacitor with Minimal Area

      A relatively soft tip is pressed into the surface of a harder
material.  The deformed tip is then retracted and kept constantly at
a distance of a few nanometer above the surface.  The distance is
preferably controlled by a feedback loop.  The feedback loop and all
devices necessary to build the capacitor is taken from standard
Scanning Tunneling Microscopy (STM) or Atomic Force Microscopy.  In
very stable, vibration-free environments, a feedback loop might be
unnecessary.  The device can be used for example as gravity wave
detector or any other application where a large capacitance is
required within a small volume.  Fig. 1 shows an experimental setup
with a 35 pF capacitance with an area of approximately 10 adjust (up
3 r .5) -12 ' m' adjust (up 3 r .5) 2.  The dimensions are verified
by an SEM picture of the deformed tip as dipicted by Fig. 2.  The tip
was made of platinum-iridium and was pressed against a silicon
surface covered with a gold layer.