Patent ID: 6064087
Filing Date: 2000-05-16
Classification: H01L

Abstract:
A MOS technology power device comprising:a semiconductor material layer of a first conductivity type;a conductive insulated gate layer covering the semiconductor material layer, the conductive insulated gate layer including a first insulating material layer above the semiconductor material layer, a conductive material layer above the first insulating material layer, and a second insulating material layer above the conductive material layer;a plurality of elementary functional units, each elementary functional unit including:an elongated body region of a second conductivity type having a length and formed in the semiconductor material layer, the elongated body region having a central heavily doped deep body portion and two lateral lightly doped portions:an elongated window in the conductive insulated gate layer through each of the first insulating material layer, the conductive material layer, and the second insulating material layer, disposed above the central heavily doped deep body portion and along the elongated body region;a source region of the first conductivity type, disposed at least in the central heavily doped deep body portion of the elongated body region and intercalated along the length of the elongated body region with a body portion of the central heavily doped deep body portion of the elongated body region wherein no dopant of the first conductivity type is provided;a plurality of insulating material sidewall spacers, each one disposed above the central heavily doped deep body portion of the elongated body region at an elongated edge of the elongated window in each of the first insulating material layer, the conductive material layer and the second insulating material layer;a metal layer above the semiconductor material layer and the conductive insulated gate layer, contacting the central heavily doped deep body portion of the elongated body region and the source region through the elongated window of each elementary functional unit; andwherein each elongated body region includes a central heavily doped elongated deep body region and two lateral lightly doped elongated channel regions, the central heavily doped elongated deep body region having elongated edges substantially aligned with elongated edges of the elongated window in the insulated gate layer.