摘要:
A technique capable of preventing whiskers which are generated in a plating film formed on the surface of each of leads of a semiconductor device is provided. Particularly, a technique capable of preventing generation of whiskers in a plating film containing tin as a primary material and not containing lead is provided. The plating film formed on the surface of the lead is formed so that a particular plane orientation among plane orientations of tin constituting the plating film is parallel to the surface of the lead. Specifically, the plating film is formed so that the (001) plane of tin is parallel to the surface of the lead. Thus, the coefficient of thermal expansion of tin constituting the plating film can be made to be lower than a coefficient of thermal expansion of the copper constituting the lead.
摘要:
There is provided a semiconductor device which has been improved in adhesion between leads and a sealing resin (molding resin), and thus does not undergo peeling therebetween, and has high reliability.The semiconductor device includes 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.
摘要:
Since a chalcogenide material has low adhesion to a silicon oxide film, there is a problem in that it tends to separate from the film during the manufacturing step of a phase change memory. In addition, since the chalcogenide material has to be heated to its melting point or higher during resetting (amorphization) of the phase change memory, there is a problem of requiring extremely large rewriting current. An interfacial layer includes an extremely thin insulator or semiconductor having the function as both an adhesive layer and a high resistance layer (thermal resistance layer) is inserted between chalcogenide material layer/interlayer insulative film and between chalcogenide material layer/plug.
摘要:
A semiconductor device in which an adhesion between a lead and a sealing body (mold sealing body) is improved to prevent the peering is provided. In a semiconductor device having a semiconductor chip, a plurality of leads electrically connected to the semiconductor chip and mainly made of metal and a sealing body for sealing the semiconductor chip, in order to improve the adhesion between the lead and the sealing body (mold sealing body), a material combination with good lattice matching is used as a combination of a surface material of the lead and a material of the sealing body, and the sealing body mainly made of acene is used.
摘要:
A magnetoresistive head is provided with high reliability and produced at a high yield rate. The magnetoresistive head includes a lower magnetic shield layer, an upper magnetic shield layer, a magnetoresistive effect film, and means for causing a current to flow in the direction of the thickness of the magnetoresistive effect film. The magnetoresistive effect film is provided between the lower magnetic shield layer and the upper magnetic shield layer. The magnetoresistive effect film is composed of a fixed layer, a non-magnetic layer, an insulating barrier layer and a free layer. The four layers of the magnetoresistive effect film are formed in this order. The insulating barrier layer is an oxide layer containing at least one of titanium and nickel.
摘要:
A magnetic reproduction head includes a lower magnetic shield layer, an upper magnetic shield layer, a magnetoresistive film formed between the lower and the upper magnetic shield layers, a refill film in an element height direction disposed in contact with a surface opposite a floating surface of the magnetoresistive film, and a refill film in a track width direction disposed on a side wall surface of the magnetoresistive film. The magnetoresistive film is a tunneling magnetoresistive film including a free layer, an insulating barrier layer, and a fixed layer. The insulating barrier layer is one of a magnesium oxide film, an aluminum oxide film, and a titanium oxide film which contains at least one of nitrogen and silicon.
摘要:
Manufacturing processes for phase change memory have suffered from the problem of chalcogenide material being susceptible to delamination, since this material exhibits low adhesion to high melting point metals and silicon oxide films. Furthermore, chalcogenide material has low thermal stability and hence tends to sublime during the manufacturing process of phase change memory. According to the present invention, conductive or insulative adhesive layers are formed over and under the chalcogenide material layer to enhance its delamination strength. Further, a protective film made up of a nitride film is formed on the sidewalls of the chalcogenide material layer to prevent sublimation of the chalcogenide material layer.
摘要:
A piezoelectric element that is high in piezoelectric performance and large in displacement and is reliable is provided. The piezoelectric element includes a piezoelectric material containing BaTi2O5 as the principal constituent material and an inner electrode that applies voltage to the piezoelectric material. In this piezoelectric element, an electrode material (a mixture of Ru and RuO2) excellent in lattice matching with the piezoelectric material BaTi2O5 is used as the principal constituent material of the inner electrode.