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:
Jun. 23, 1987
Filed:
Jun. 26, 1985
William J Cardin, Merrimack, NH (US);
Michael Gulla, Sherborn, MA (US);
Charles L Newton, Clearwater, FL (US);
Shipley Company Inc., Newton, MA (US);
Abstract
An apparatus for maintaining the consumable components of an electroless plating solution at predetermined concentration in a plating tank containing the plating solution while workpieces are being processed in the tank. The apparatus measures the concentrations of the consumable components in a sample stream of the electroless plating solution and based on these measurements, meters the required amounts of the components into the plating solution. A portion of the apparatus provides for the introduction of plating solution poison into the sample stream to prevent autocatalytic decomposition and deposition of the plating metal, e.g., copper, onto to the walls and sensors of the apparatus.