Patent ID: 8203221

Claim:
A semiconductor device, comprising: a semiconductor chip; a plurality of leads including a metal as a main constitutional material, electrically connected with the semiconductor chip; and a resin for sealing the semiconductor chip, wherein the plurality of leads each have an outer lead portion exposed from the resin and an inner lead portion embedded in the resin, and the resin contains an aromatic compound having a benzene ring and/or a compound having a cyclohexane ring, and the benzene ring and/or the cyclohexane ring contained in the resin and a metal atom which is a main constitutional material of a surface material of the inner lead portion are arranged so as to be superposed one on the other at an interface at which the surface material of the inner lead portion and the resin are in contact with each other, wherein the surface material of the inner lead portion contains one selected from a group consisting of boron, manganese and silicon as an additive element, wherein the metal which is the main constitutional material of the surface material of the inner lead portion is copper or nickel, wherein a content of the additive element is 0.5 to 12 at % under a condition that the additive element is boron, 0.2 to 13 at % under a condition that the additive element is manganese, and 0.2 to 13 at % under a condition that the additive element is silicon, and the resin is the aromatic compound containing the benzene ring, wherein a surface crystal structure of the inner lead portion has a (111) crystalline texture of copper or nickel, and wherein the surface material of the inner lead portion contains oxygen, and the resin is a resin prepared by adding 1 to 20 at % cyclohexane molecules to the aromatic compound containing 40 at % or more benzene ring.