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:
Aug. 06, 2019
Filed:
May. 03, 2017
Ferro Corporation, Mayfield Heights, OH (US);
Srinivasan Sridharan, Strongsville, OH (US);
John J. Maloney, Solon, OH (US);
George E. Sakoske, Independence, OH (US);
Gregory R. Prinzbach, Brecksville, OH (US);
David Widlewski, Parma Heights, OH (US);
Jackie Davis, Cleveland, OH (US);
Bradford Smith, North Ridgeville, OH (US);
Ferro Corporation, Mayfield Heights, OH (US);
Abstract
A passivation glass coating composition is provided for forming a fired passivation glass layer on a semiconductor substrate having p-n junction. The passivation glass coating composition includes a glass component that is lead free, cadmium free, alkali metal oxides free, and colored transition metal oxides (i.e. metal oxides of V, Fe, Co, Ni, Cr, Cu, Mn) free. The glass component includes bismuth based glasses, and provides a firing temperature range of 500° C. to 900° C., and controlled devitrification. Once fired to a semiconductor device, the fired passivation glass layer provides exceptional device performance including no cracking of the fired passivation glass layer, excellent thermal expansion matching to silicon, good chemical resistance to acid and base, and improved device performance.