The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 05, 1989
Filed:
Oct. 01, 1987
Applicant:
Inventors:
Serge Larigaldie, Chatenay-Malabry, FR;
Joseph Taillet, Boulogne, FR;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05F / ;
U.S. Cl.
CPC ...
361216 ; 361231 ; 361235 ;
Abstract
A frame is placed in the flow of incident air from a laminar flow hood, and bare wires and insulated wires are stretched over the frame. A source including a transformer produces an alternating voltage. One of the outputs thereof is directly connected to the insulating wires and the other output thereof is connected to the bare wires via a capacitor. An electrode placed inside the volume of the cabinet fed with air from the hood is connected to a DC amplifier which applies a correcting voltage to the insulated wires. This apparatus turns out to be highly effective, in particular, for removing dust and neutralizing charge when manufacturing VLSI circuits.