Robert W Lieberman

US Patent:

RE336513, Jul 30, 1991

Filed:

Oct 11, 1988

Appl. No.:

7/255918

Inventors:

Greg E. Blonder - Summit NJ
Angelo A. Lamola - Sudbury MA
Robert A. Lieberman - Murray Hill NJ

Assignee:

AT&T Bell Laboratories - Murray Hill NJ

International Classification:

H01G 518
H01G 700
G01L 900

US Classification:

361291

Abstract:

A variable gap device which comprises a suitable material with a cavity formed therein mounted over a body. Elements are formed on the surface of the body and on the top surface of the cavity. In one embodiment, the elements are electrodes of a variable capacitance device, and in another embodiment the elements are partial or total reflectors of incident light from an optical fiber. The surface of the cavity opposite the body is preferably flat and of the order of microns from the body. The device is fabricated by forming a removable layer over a temporary substrate. An appropriate element pattern is formed over the removable layer and the layer is etched in a configuration which will define the cavity. The deformable material is encapsulated over this structure and then removed from the substrate with the element remaining in the cavity. Any removable material remaining in the cavity can then be etched away.

US Patent:

43896693, Jun 21, 1983

Filed:

Feb 27, 1981

Appl. No.:

6/238831

Inventors:

Daniel Epstein - Oceanside NY
Robert Lieberman - Bethpage NY

Assignee:

ILC Data Device Corporation - Bohemia NY

International Classification:

H04N 718

US Classification:

358101

Abstract:

An opto-video inspection system for inspecting and examining miniaturized solid-state devices, such as hybrids. An XY table simultaneously positions a known good device and a device to be inspected under respective stereo-zoom microscopes. A TV camera is coupled to each microscope. The XY table, under microprocessor control, is manipulated to select the "target" or wire bond to be viewed. The selected sites may be simultaneously viewed upon a split screen video display or, alternatively, either the known good device or the device being inspected may be separately viewed through the associated stereo-zoom microscope or on the video screen. Dwell time at each site is computer selectable, as is the sequencing of sites to be viewed. Defective bonds, imperfections or other conditions are permanently recorded through a printer which automatically associates the code printed thereby with the site in view at that time. An operator keyboard permits completed program steps to be recalled for review or for reprogramming, if desired.

US Patent:

47094133, Nov 24, 1987

Filed:

Jun 13, 1985

Appl. No.:

6/744465

Inventors:

Stephen R. Forrest - Chatham NJ
Robert A. Lieberman - New Providence NJ
Richard L. Panock - Lexington MA

Assignee:

American Telephone and Telegraph Company, AT&T Bell Laboratories - Murray Hill NJ

International Classification:

H04B 900
C12M 134
A61B 502

US Classification:

455606

Abstract:

A bidirectional fiber optic system is described in which at one terminal the output radiation of a light source (LED or semiconductor laser) is coupled through a small diameter hole in the active area of a photodiode into the core of a larger diameter transmission fiber. On the other hand, radiation propagating through the fiber in the opposite direction exits from the fiber with a large numerical aperture so that most of it is incident on the active area of the photodiode and little is lost through the hole. Also described are a number of photodiode configurations for use in such a system, as well as dual photodiodes to perform both signal detection and output monitoring functions. Further described are fiber optic sensing systems for monitoring such variables as blood pressure.

US Patent:

46176080, Oct 14, 1986

Filed:

Jun 13, 1985

Appl. No.:

6/744382

Inventors:

Greg E. Blonder - Maplewood NJ
Angelo A. Lamola - Warren NJ
Robert A. Lieberman - New Providence NJ

Assignee:

AT&T Bell Laboratories - Murray Hill NJ

International Classification:

H01G 518
H01G 700
G01L 900

US Classification:

361291

Abstract:

A variable gap device which comprises a suitable material with a cavity formed therein mounted over a body. Elements are formed on the surface of the body and on the top surface of the cavity. In one embodiment, the elements are electrodes of a variable capacitance device, and in another embodiment the elements are partial or total reflectors of incident light from an optical fiber. The surface of the cavity opposite the body is preferably flat and of the order of microns from the body. The device is fabricated by forming a removable layer over a temporary substrate. An appropriate element pattern is formed over the removable layer and the layer is etched in a configuration which will define the cavity. The deformable material is encapsulated over this structure and then removed from the substrate with the element remaining in the cavity. Any removable material remaining in the cavity can then be etched away.