International Business Machines Corporation

Ampex Corporation

Moritz Branger

Lubomyr Taras Romankiw

Panayotis Constantinou Andricacos

John Owen Dukovic

Matteo Flotta

Robert W Hitzfeld

Robert M Browne

Benjamin W Fu

Saeed Sahami

Donald R McKenna

A multi-compartment electroplating system for electroplating two or more objects simultaneously such that the electrodeposited material is substantially uniform in thickness and composition. Electroplating solution is circulated between a reservoir and a multi-compartment tank which has one cathode-paddle-anode (CPA) assembly for each compartment. Each CPA assembly has an anode, a cathode adapted for holding a wafer and employing a single thieving electrode which covers all of the floor of the compartment not covered by the wafer, and a paddle. Also included is a cover which houses a single linear motor for driving all of the paddles in synchrony.

Multi-compartment eletroplating system

A magnetic tape is guided past a transverse-scan rotating transducing head drum which is shaped to create an air bearing film between the drum and tape, so that only the tips of the heads themselves engage the tape. To avoid adverse influence on the air bearing, the guide means is arranged to engage the tape only at points remote from the plane of the head drum, and to induce at these points a transverse curvature in the tape that is of smaller radius than that of the head drum, ensuring that the tape rests closely on the air bearing across the entire tape width.

Magnetic tape transducing apparatus

Growing community of inventors

Los Altos, CA, United States of America

Moritz Branger