Ceramic substrate and method of manufacturing the same
AssigneeNgk Spark Plug Co., Ltd.
InventorsTatsuya KATOH, Masanori ITO, Masaki KUTSUNA
Life of this patent
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Abstract
A method of manufacturing a ceramic substrate includes the steps of preparing a ceramic paste in which a powder of at least one of a metal boride and a metal silicide is added to a raw material powder of a glass ceramic, applying the ceramic paste to a green sheet which is to become a ceramic layer after firing, applying a conductor paste which is to become a conductor trace after firing to the ceramic paste having been applied to the green sheet, and firing the green sheet carrying the ceramic paste and the conductor paste applied thereto.
Claims7
A method of manufacturing a ceramic substrate including a ceramic layer mainly formed of a glass ceramic and a conductor trace mainly formed of silver (Ag), comprising:
- a step of preparing a ceramic paste in which a powder of at least one of a metal boride and a metal silicide is added to a raw material powder of the glass ceramic;
- a step of applying the ceramic paste to a green sheet which is to become the ceramic layer after firing;
- a step of applying a conductor paste which is to become the conductor trace after firing to the ceramic paste having been applied to the green sheet;
- and
- a step of firing the green sheet carrying the ceramic paste and the conductor paste applied thereto.
A method of manufacturing a ceramic substrate including a ceramic layer mainly formed of a glass ceramic and a conductor trace mainly formed of silver (Ag), comprising:
- a step of preparing a ceramic slurry in which a powder of at least one of a metal boride and a metal silicide is added to a raw material powder of the glass ceramic;
- a step of making from the ceramic slurry a green sheet which is to become the ceramic layer after firing;
- a step of applying a conductor paste which is to become the conductor trace after firing to the green sheet;
- and
- a step of firing the green sheet carrying the conductor paste applied thereto.
A ceramic substrate comprising a plurality of ceramic layers mainly formed of a glass ceramic and a conductor trace mainly formed of silver (Ag), wherein
- the ceramic layers comprise a first ceramic layer which is located adjacent to the conductor trace and a second ceramic layer which sandwiches the first ceramic layer in cooperation with the conductor trace;
- and
- the concentration of either silicon atoms (Si) or boron atoms (B) contained in the first ceramic layer is higher than that in the second ceramic layer.
Dependencies are inferred from the claim text.