Concave station coalesced copper tube

The utility model provides a concave station coalesced copper tube. Belongs to the technical field of power semiconductor devices. It solves present concave station tube to have poor, the easy problem of leaking gas of heat conductivility. Its leading features is: it includes that the negative pole conducting layer makes pottery porcelain ring on, and encapsulate the valve fence on and to go up the sealing -in piece, down the sealing -in piece encapsulates valve fence, make pottery porcelain ring and positive pole conducting layer down under including, the negative pole conducting layer encapsulates valve fence, positive pole conducting layer on, and encapsulates valve fence material under and for the coalesced copper, and the nickel dam has been plated on the surface make pottery on, porcelain ring respectively with negative pole conducting layer and last encapsulation valve fence welded connection, the porcelain ring that makes pottery down encapsulates valve fence welded connection under with the positive