Patent ID: 7884348
Filing Date: 2011-02-08
Classification: G11C,H01L

Abstract:
1. A semiconductor device which includes a memory cell, comprising: a semiconductor substrate which has a front surface; a first isolation film formed in the front surface of the semiconductor substrate and extended in a first direction; a second isolation film formed in the front surface of the semiconductor substrate and extended in the first direction; a third isolation film formed in the front surface of the semiconductor substrate and extended in the first direction; a first ion implanted region formed in the front surface of the semiconductor substrate, formed between the first isolation film and the second isolation film, and which is a part of a first transistor; a second ion implanted region formed in the front surface of the semiconductor substrate, formed between the first isolation film and the second isolation film, and which is a part of the first transistor; a third ion implanted region formed in the front surface of the semiconductor substrate, formed between the second isolation film and the third isolation film, and which is a part of a second transistor; a fourth ion implanted region formed in the front surface of the semiconductor substrate, formed between the second isolation film and the third isolation film, and which is a part of the second transistor; an insulating film formed over the first isolation film, the second isolation film, and the third isolation film, and formed between an upper region of the first ion implanted region and an upper region of the second ion implanted region, and formed between an upper region of the third ion implanted region and an upper region of the fourth ion implanted region, and extended in a second direction which is perpendicular to the first direction; a phase change film formed over the first isolation film, the second isolation film, and the third isolation film, and extended in the second direction; an electric conduction film formed on the phase change film and extended in the second direction; a first metallic film formed over the front surface of the semiconductor substrate and extended in the first direction; a second metallic film formed over the front surface of the semiconductor substrate and extended in the first direction; a first plug connected to the first metallic film and the first ion implanted region; a second plug connected to the phase change film and the second ion implanted region; a third plug connected to the second metallic film and the third ion implanted region; and a fourth plug connected to the phase change film and the fourth ion implanted region.