Applied Materials, Inc.

Bharatwaj Ramakrishnan

Visweswaren Sivaramakrishnan

Ankur Kadam

Vijay Bhan Sharma

Abhijeet Laxman Sangle

Yuan Xue

A physical vapor deposition system includes a deposition chamber, a support to hold a substrate in the deposition chamber, a target in the chamber, a power supply configured to apply power to the target to generate a plasma in the chamber to sputter material from the target onto the substrate to form a piezoelectric layer on the substrate, and a controller configured to cause the power supply to alternate between deposition phases in which the power supply applies power to the target and cooling phases in which power supply does not apply power to the target. Each deposition phase lasts at least 30 seconds and each cooling phase lasts at least 30 seconds.

Physical vapor deposition of piezoelectric films

A method of fabricating a piezoelectric layer includes depositing a piezoelectric material onto a substrate in a first crystallographic phase by physical vapor deposition while the substrate remains at a temperature below 400&#xb0; C., and thermally annealing the substrate at a temperature above 500&#xb0; C. to convert the piezoelectric material to a second crystallographic phase. The physical vapor deposition includes sputtering from a target in a plasma deposition chamber.

Growing community of inventors

San Jose, CA, United States of America

Bharatwaj Ramakrishnan