Patent ID: 7282444

Claim:
A semiconductor chip manufacturing method comprising the steps of: providing a semiconductor substrate having a front surface and a rear surface, the front surface having a first portion and a second portion; forming a function device on the second portion of the front surface; forming a concave portion in the semiconductor substrate, the concave portion extending in a thickness direction of the semiconductor substrate from the first portion of the front surface; forming an oxidation preventive film made of a first metal material by supplying the first metal material onto an inner wall surface of the concave portion; supplying a second metal material containing a metal that is oxidized more easily than the first metal material into the concave portion after the step of forming the oxidation preventive film; electrically connecting the second metal material supplied into the concave portion and the function device; and thinning the semiconductor substrate, so that the thickness thereof becomes thinner than a depth of the concave portion, by removing the semiconductor substrate from the rear surface without removing the oxidation preventive film, the concave portion being formed into a through hole penetrating the semiconductor substrate in the thickness direction, and so that the second metal material disposed inside the concave portion is formed into both (i) a penetrating electrode that electrically connects the front surface and the rear surface and (ii) a rear side protruding electrode protruding from the rear surface, wherein the step of supplying the second metal material into the concave portion and the step of electrically connecting the second metal material and the function device are simultaneously carried out.