PURPOSE: To enhance junction strength of a chip consisting of the sintered body of a high melting point metal and a metal lead bar by a method wherein the metal lead bar is set in the recession of the chip provided with the recession to the core part.

CONSTITUTION: The chip 2 formed of the sintered body of the high melting point metal material of tungsten, molybdenum, etc., is formed as the cylinder provided with the receission 4 in the axial direction to the core part. The tip part 3a of the lead bar 3 made of copper or a copper alloy is set in the recession 4. Accordingly, the chip 2 and the lead bar 3 are integrated in one body, and the chip of high junction strength is formed.