Christopher Richard Dube

US Patent:

20030151400, Aug 14, 2003

Filed:

Feb 14, 2002

Appl. No.:

10/075754

Inventors:

Anthony Petrovich - Tewksbury MA, US
John Williams - Lexington MA, US
Christopher Dube - Lexington MA, US

International Classification:

G01R023/00

US Classification:

324/076520

Abstract:

A sensor readout circuit which provides a frequency signal output including a phase detector circuit responsive to an output signal from a sensor and an input signal to the sensor and configured to detect the phase difference between the input signal and the output signal, and a drive circuit responsive to the phase detector circuit and configured to maintain a fixed phase difference between the input signal and the output signal.

US Patent:

20040089357, May 13, 2004

Filed:

Jun 23, 2003

Appl. No.:

10/601606

Inventors:

Christopher Dube - Lexington MA, US
Jason Fiering - Cambridge MA, US
Mark Mescher - West Newton MA, US

International Classification:

F16K027/00

US Classification:

137/884000

Abstract:

An integrated electrofluidic system including an electronic control system amounted on a support platform, a microfluidic system embedded in the platform and having an input and an output and at least one electrofluidic component, and at least one electrical conductor carried by the platform for electrically interconnecting the electronic control system and the at least one electrofluidic component.

US Patent:

20050238506, Oct 27, 2005

Filed:

Jun 28, 2005

Appl. No.:

11/169211

Inventors:

Mark Mescher - West Newton MA, US
Jason Fiering - Cambridge MA, US
Christopher Dube - Lexington MA, US

Assignee:

The Charles Stark Draper Laboratory, Inc. - Cambridge MA

International Classification:

F04B017/00
F04B035/04

US Classification:

417413100, 417050000, 417410100, 417413300

Abstract:

A variable, closed-loop apparatus for regulating a microfluidic flow that employs a low-power deflection assembly, which is surface-mounted over a flexible membrane overlying a chamber integrated into a microfabricated platform. A flexible membrane, moveable between two positions, sealingly overlies the chamber. One of the positions of the membrane restricts the flow through the chamber to a greater degree than the other position. A deflection assembly disposed on the substrate over the membrane unidirectionally deflects the membrane, thereby regulating the flow through the chamber.

US Patent:

51183625, Jun 2, 1992

Filed:

Sep 24, 1990

Appl. No.:

7/586894

Inventors:

David A. St. Angelo - Lowell MA
Frank J. Bottari - Acton MA
Christopher E. Dube - Arlington MA

Assignee:

Mobil Solar Energy Corporation - Billerica MA

International Classification:

H01L 3104
H01L 3118
H01L 310224

US Classification:

136256

Abstract:

Nickel is introduced into the construction of the rear electrical contacts on silicon solar cells to reduce contact resistance between the aluminum contact material and the silver pads. In one embodiment, the nickel is applied as an intermediate layer between the silicon substrate and each silver pad. In a second and preferred embodiment, the nickel is incorporated into the silver ink that is used to make the soldering pads. Specifically, the invention provides a "double-fired" process for forming a rear contact on a solar cell wherein (1) a windowed aluminum layer is first formed on the rear surface of a partially finished silicon solar cell by printing an aluminum ink or paste that contains a glass frit, (2) the aluminum ink or paste is fired without any intervening drying step, (3) soldering pads are formed by printing a silver/nickel/glass frit ink or paste so as to fill and overlap the windows, and (4) the silver/nickel/glass frit ink or paste is fired so as to cause the constituents thereof to make an ohmic bond with the silicon substrate. The foregoing procedure is integrated with the formation of a silver grid contact on the front side of the solar cell substrate in a conventional manner and firing that grid contact simultaneously with the silver soldering pads so as to form an ohmic contact with the front surface of the substrate.

US Patent:

50115650, Apr 30, 1991

Filed:

May 17, 1990

Appl. No.:

7/524346

Inventors:

Christopher E. Dube - Arlington MA
Ronald C. Gonsiorawski - Danvers MA

Assignee:

Mobil Solar Energy Corporation - Billerica MA

International Classification:

B44C 122
C03C 1500
C03C 2506

US Classification:

156643

Abstract:

A method of applying metallized contacts to a solar cell substrate, the front surface of which is covered with a dielectric layer. The method involves forming a plurality of apertures extending through the dielectric layer using a laser beam and defining a grid-shaped electrode. The apertures comprise a plurality of microscopically-sized holes that are arranged in a series of rows, with the holes being spaced a relatively short distance from one another. Nickel is plated onto the portions of the substrate exposed through the apertures. The nickel plating is then overcoated with copper which is preferably applied by a contactless light-induced plating process. The copper plating process causes copper to be deposited so that it bridges over the dielectric layer between the holes so as to form an integrated grid electrode structure.

US Patent:

20140273330, Sep 18, 2014

Filed:

Mar 12, 2013

Appl. No.:

13/795726

Inventors:

- Gloucester MA, US
Christopher E. Dube - Lexington MA, US
Deepak A. Ramappa - Somerville MA, US

Assignee:

Varian Semiconductor Equipment Associates, Inc. - Gloucester MA

International Classification:

H01L 31/0236

US Classification:

438 71

Abstract:

Methods of creating a workpiece having a smooth side and a textured side are disclosed. In some embodiments, a first side of a workpiece is doped, using ion implantation or diffusion, to create a doped layer. This doped layer of the first side may be more resistant to chemical treatment than the second side of the workpiece. This allows the second side of the workpiece to be textured without capping or otherwise protecting the doped first side, even though the doped layer of the first side physically contacts the chemical treatment. In some embodiments, a p-type dopant is used to create the doped layer. In some embodiments, the workpiece is processed to form a solar cell.