Back to results
US 8,867,191 B2Granted
Capacitor and method of making same
AssigneeSchott AG
InventorsMartin Letz, Hans-Heinrich Gundelach, Holger Wegener
Life of this patent
Estimating the term…
Abstract
A capacitor having a dielectric consisting of a glass layer with an alkali metal oxide content of at most 2 wt % and a thickness of at most 50 μm is provided. The capacitor includes at least two metal layers which are separated by the glass layer. The glass layer is preferably produced by a down-draw method or by an overflow down-draw fusion method.
Claims17
A capacitor comprising:
- at least two metal layers;
- and
- a dielectric layer separating said at least two metal layers, said dielectric layer being configured as a glass layer having a fire-polished surface, said glass layer having an alkali metal oxide content of at most 0.5 wt % and having a thickness of at least 5 μm and at most 30 μm,
- wherein said glass layer glass comprises the following components in weight percent based on oxide:
- SiO2
- 45-70;
- Al2O3
- 5-25;
- B2O3
- 1-16;
- alkaline-earth metal oxides
- 1-30;
- and
- alkali metal oxides
- 0-1.
12 more elements
A capacitor comprising:
- at least two metal layers;
- and
- a dielectric layer separating said at least two metal layers, said dielectric layer being configured as a glass layer having a fire-polished surface, said glass layer being essentially free of alkali metal oxides and having a thickness of at most 50 μm,
- wherein said glass layer consists of a glass comprising the following components in weight percent based on oxide:
- SiO2
- 40-75,
- Al2O3
- 1-25,
- B2O3
- 0-16,
- alkaline-earth metal oxides
- 0-30, and
- alkali metal oxides
- 0-2.
11 more elements
A capacitor comprising:
- at least two metal layers;
- and
- a dielectric layer separating said at least two metal layers, said dielectric layer being a glass layer having a fire-polished surface with a maximum mean roughness depth RMS of at most 1 nanometer, said glass layer being essentially free of alkali metal oxides and having a thickness of at most 50 μm,
- wherein said glass layer consists of a glass which comprises the following components in weight percent based on oxide:
- SiO2
- 45-70,
- Al2P3
- 5-25,
- B2O3
- 1-16,
- alkaline-earth metal oxides
- 1-30, and
- alkali metal oxides
- 0-1.
11 more elements
Dependencies are inferred from the claim text.