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US 4,650,619 AGranted
Method of machining a ceramic member
AssigneeToshiba Ceramics Co., Ltd.
InventorKuniaki Watanabe
Life of this patent
Estimating the term…
Abstract
Gas supply passages can be formed accurately in a ceramic member by a ceramic member machining method comprising irradiating laser beams to a ceramic member thereby forming gas supply passages in the member.
Claims5
A method for producing a sintered ceramic member having a plurality of penetrating holes for passing a gas therethrough, wherein the method comprises;
- a step of impregnating the ceramic member with tar or pitch by an amount of 15% or less than 15% by weight thereof to prevent a laser beam reflection in a subsequent step of a laser beam irradiation,
- a step of forming each of the penetrating holes by irradiating a laser beam on a portion of the ceramic member while focusing the irradiated laser beam, and
- a step of blowing a gas at a gas flow rate of approximately 30 to 150 liters/min to said portion of the ceramic member melted under the irradiation of the laser beam for removing the molten portion of the ceramic member, thereby solidifying the portion of the ceramic member constituting a circumferential wall of said each penetrating hole.
Dependencies are inferred from the claim text.