Intellectual Property Office

Non-Confidential Disclosures

New Metallization For PB-Containing Dielectrics

PSU Invention Disclosure No. 1089

Field of the Invention:

laminated ceramic cutting tool

Inventors:

J.P. Dougherty, et al.

Patent status:

Issued Patent No. 5,855,997

Invention description:

It has been newly determined that in a reaction of an Ag/Pd metallization with Pb from a lead-based ceramics, a maximum solubility of Pb is observed of approximately 14% (atomic percent). By inclusion of an effective amount of Pb in the Ag/Pd metallization, leaching of Pb from a Pb-based ceramic is either reduced or eliminated. Thus, upon firing, the metallization exhibits an equilibration which prevents Pb from being drawn out of the underlying ceramic. Similarly, Ag/Pd metallization shows a maximum solubility of 16 atomic percent for Bi in Bi-based ceramics. Inclusion of an effective amount of Bi in the metallization prevents a Bi leaching from an underlying ceramic.

Contact:

Matthew D. Smith
Sr. Licensing Officer
Intellectual Property Office
The Pennsylvania State University
113 Technology Center
University Park, PA 16802-7000
Phone: (814) 863-1122
Fax: (814) 865-3591
E-mail: mds126@psu.edu