Michael C Gulla

US Patent:

45655758, Jan 21, 1986

Filed:

Nov 2, 1984

Appl. No.:

6/667738

Inventors:

William J. Cardin - Merrimack NH
Michael Gulla - Sherborn MA
Charles L. Newton - Clearwater FL

Assignee:

Shiplay Company Inc. - Newton MA

International Classification:

C23C 302

US Classification:

106 122

Abstract:

A controller for measuring the concentration of consumable ingredients in a plating solution characterized by the use of a plating poison introduced into the analysate stream to prevent autocatalytic decomposition and deposition of copper onto the walls and sensors of the controller.

US Patent:

45114030, Apr 16, 1985

Filed:

Jan 16, 1980

Appl. No.:

6/112781

Inventors:

Alfred P. Orio - Westford MA
Leonard R. Levy - Framingham MA
Michael Gulla - Sherborn MA

Assignee:

Shipley Company Inc. - Newton MA

International Classification:

C23C 302

US Classification:

106 122

Abstract:

This invention is for an immersion tin plating composition capable of depositing tin over metallic surfaces displaceable by tin and to processes using the same. The composition is characterized by an inhibitor that improves the plating characteristics of the solution and permits an increased ratio of thiourea to tin at a relatively high tin concentration without formation of "black tin". The tin plating compositions of this invention are capable of providing an increased yield of good quality tin compared to prior art tin plating compositions.

US Patent:

44243154, Jan 3, 1984

Filed:

Sep 20, 1982

Appl. No.:

6/422310

Inventors:

Paul Taylor - North Andover MA
Michael Gulla - Sherborn MA

Assignee:

Shipley Company Inc. - Newton MA

International Classification:

C08L 6110

US Classification:

525501

Abstract:

This invention relates to resin blends of naphthol resins and novolak resins. Naphthol resins are acid catalyzed condensation products of an aromatic alcohol with an aldehyde where the aromatic alcohol is a naphthol or a mixture of a naphthol and a phenol. The blends of the invention preferably contain a total of from 5 to 35 mole percent repeating units derived from naphthol. The blends are useful as molding compounds or as film forming materials.

US Patent:

46744401, Jun 23, 1987

Filed:

Jun 26, 1985

Appl. No.:

6/748968

Inventors:

William J. Cardin - Merrimack NH
Michael Gulla - Sherborn MA
Charles L. Newton - Clearwater FL

Assignee:

Shipley Company Inc. - Newton MA

International Classification:

B05C 1110

US Classification:

118688

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.