Robert Nelson Marchant

US Patent:

7056057, Jun 6, 2006

Filed:

Aug 29, 2003

Appl. No.:

10/652381

Inventors:

Robert Beniah Marchant - San Clemente CA, US

International Classification:

E02B 3/12

US Classification:

405 15

Abstract:

A fluid flows control apparatus includes an elongate stocking having a flexible cylindrical sidewall. The sidewall has plural apertures of a shape and placement in the sidewall as to cover a majority of the surface area and to enable the sidewall to expand radially in preference to axial extension. The stocking is filled with a filter media that may also be chemically or biologically reactive or expansive upon absorption of water.

US Patent:

6319743, Nov 20, 2001

Filed:

Apr 14, 1999

Appl. No.:

9/291468

Inventors:

Robert B. Marchant - San Clemente CA
Majid Fazeli - Plano TX

Assignee:

Mykrolis Corporation - Bedford MA

International Classification:

H01L 2100

US Classification:

438 50

Abstract:

Semiconductor piezoresistive sensors are formed by a process using selective laser activation of a doped semiconductor surface. The substrate is a flexible membrane such as a diaphragm or bellows. A layer of insulative dielectric material is first applied to the substrate. A layer of highly resistive doped semiconductor material is then deposited on top of the dielectric layer. Through the use of an alignment device one or more piezoresistive sensors are formed by use of laser annealing of selected areas of the semiconductor material such that the annealed areas have a resistance suitable for use as sensors. Metal contacts are then applied over the end portions of sensors and form an electrical connection to the sensors. The non-annealed portions of doped semiconductor layer act as insulators between the formed piezoresistive sensors.