Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1992-11-30
1994-05-03
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250306, H01J 314
Patent
active
053089740
ABSTRACT:
An apparatus and method for scanning a probe over a surface to either produce a measurement of the surface representative of a parameter other than the topography of the surface or to perform a task on the surface. The scanning operation is divided into two parts and with a first scan to obtain and store topographical information and with a second scan to measure the parameter of the surface other than topography or to perform the task while the probe height is controlled using the stored topographic information.
REFERENCES:
patent: 4766311 (1988-08-01), Seiler et al.
patent: 5128544 (1992-07-01), Iwatsuki
patent: 5198667 (1993-03-01), Glembocki et al.
patent: 5210410 (1993-05-01), Barrett
Elings Virgil B.
Gurley John A.
Digital Instruments, Inc.
Le Que T.
Nelms David C.
Roston Ellsworth R.
Schwartz Charles H.
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