Patent ID: 7851263

Claim:
A method of manufacturing a semiconductor device, comprising: providing a metal plate having an upper surface and a back surface, the metal plate including a plurality of lids disposed in matrix, which are defined by a first groove formed from the upper surface; providing a ceramic sheet having an upper surface and a back surface, the ceramic sheet including a plurality of headers disposed in matrix, which are defined by a second groove formed from the back surface; fixing the metal plate on the ceramic sheet by facing the back surface of the metal plate to the upper surface of the ceramic sheet, wherein the first groove is aligned with the second groove; and dividing the metal plate and the ceramic sheet along the first and the second grooves, wherein, before fixing the metal plate on the ceramic sheet, the metal plate has a first thickness in a portion at which the first groove is formed and a second thickness in a remaining portion, the second thickness is a sum of the first thickness and a depth of the first groove, wherein the first grooves are V-shaped, and the inner walls of the first groove is inclined with an angle θ from the vertical direction, wherein the metal plate is fixed on the ceramic sheet by a roller electrode, which includes at its tip a conical member whose peripheral edge is inclined with an angle θ from the vertical direction, which is the substantially the same angle of the first groove, and whereby the conical member fits in the first groove, and the metal plate is fixed on the ceramic sheet by rolling the conical member in the first groove while electric power is applied to the roller electrode.