Patent ID: 11872405
Assignee: MEDTRONIC, INC.
Field: Materials, metallurgy (Chemistry)
Classification: CPC A  C  H | IPC A  C  H

Claim 0:
1. A method of forming a glass hermetic seal, the method comprising:
forming a glass preform by:
mixing a glass with a single-phase particulate to form a mixture, the glass having a first composition comprising:
25% to 40% B2O3;
0 to 25% CaO;
0 to 25% MgO;
0 to 25% SrO;
0 to 10% La2O3;
5% to 15% SiO2;
and 10% to 20% Al2O3 
wherein all percentages are mole percentages of the glass powder;
forming a bulk shape from the mixture;
and heating the bulk shape to a reflow temperature above a glass transition temperature of the glass powder,
wherein the glass preform comprises a continuous glassy matrix having the first composition with the single-phase particulate distributed throughout the glassy matrix,
wherein the single-phase particulate has a second composition that is different from the first composition;
applying the glass preform between a conductive element and a substrate;
and applying heat to the glass preform to form the glass hermetic seal between the conductive element and substrate,
wherein the glass hermetic seal does not include a glass ceramic.