Scanning tunneling spectroscope and a spectroscopic information

Details Scanning tunneling spectroscope and a spectroscopic information Scanning tunneling spectroscope and a spectroscopic information

1990-07-06

1991-06-18

Berman, Jack I.

Radiant energy

Inspection of solids or liquids by charged particles

250307, H01J 3700

Patent

active

050251538

ABSTRACT:
A scanning tunnel spectroscope comprises a generator for applying a bias voltage (V.sub.T) of a sin wave between a sample and probe, an I-V converter for converting a tunnel current flowing when the probe is set close to the sample, to a tunnel current representing voltage singal (I.sub.T), a detector for detecting the absolute value of the voltage signal (I.sub.t), and a servo circuit for servo-controlling a distance between the sample and probe using the absolute value with the servo time constant set larger than five times the period of the bias voltage. The information concerning the unevenness of the sample is obtained based on an output of the servo control means. A unit is provided for effecting the analog operation to derive a differential conductance based on the tunnel current on the real time basis and measuring the unevenness data and differential conductance between the sample and probe kept constant.

REFERENCES:
patent: 4870352 (1989-09-01), Koechner
patent: 4894537 (1990-01-01), Blackford et al.

Affiliated with

Also associated with

Rating

Scanning tunneling spectroscope and a spectroscopic information does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Scanning tunneling spectroscope and a spectroscopic information , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scanning tunneling spectroscope and a spectroscopic information will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-146992