摘要:
A damascene process is described using a copper fill process to fill a trench (12). The copper fill (20) is started with a deposited seed layer which includes (5) copper and titanium. Some titanium migrates to the surface during the copper fill process. The structure is annealed in a nitrogen atmosphere which creates a self-aligned TiN barrier (24) at the surface of the copper fill (20). Air gaps (26) may be created in the same annealing process. The process may be used to form a multilayer structure.
摘要:
The invention relates to a tamper-resistant semiconductor device comprising a substrate (5) comprising an electronic circuit arranged on a first side thereof. An electrically-conductive protection layer (50, 50a, 50b) is arranged on a second side of the substrate (5) opposite to the first side. At least three through-substrate electrically-conductive connections (45) extend from the first side of the substrate (5) into the substrate (5) and in electrical contact with the electrically-conductive protection layer (50, 50a, 50b) on the second side of the substrate (5). A security circuit is arranged on the first side connected to the through-substrate electrically-conductive connections (45) and is arranged for measuring at least two resistance values (R12, R23, R34, R14, R13, R24) of the electrically-conductive protection layer (50, 50a, 50b) through the through-substrate electrically-conductive connections (45). The security circuit is further arranged for comparing the measured resistance values (R12, R23, R34, R14, R13, R24) with reference resistance values.
摘要:
In the method a first layer, particularly of amorphous silicon, is deposited on the surface of a substrate with trenches. Part of this surface is covered with a protective layer. The first layer is thereafter maskless removed with a dry etching treatment on the substrate surface while it is kept within the trench.
摘要:
A semiconductor device in which a capacitor (2) is provided on a surface (10) of a semiconductor body (3) with a semiconductor element (1) in which a lower electrode (11), an oxidic ferroelectric dielectric (12) and an upper electrode (13) are provided in that order, the upper electrode not covering an edge of the dielectric, after which an insulating layer (14) with superimposed metal conductor tracks is provided. According to the invention, the edge of the dielectric (12) not covered by the upper electrode (13) is coated with a coating layer (14, 20, or 30) practically imperviable to hydrogen, after which the device is heated in a hydrogen-containing atmosphere. Heating in a hydrogen atmosphere neutralizes dangling bonds which arise during deposition of the conductor tracks on the insulating layer, while the coating layer protects the dielectric from attacks by hydrogen. The semiconductor device then has a shorter access time.
摘要:
A semiconductor device with a monocrystalline silicon body (1) is provided with a dielectric layer (2) with contact holes (3) through which the silicon body (1) is contacted with an aluminum metallization. To avoid undesirable separation of silicon, a discontinuous nucleus layer (5) of a metal nobler than silicon is formed on the silicon body (1) in the contact holes (3) preceding the provision of the metallization (4). Metals such as palladium and copper may be used to form the discontinuous layer.
摘要:
The present invention relates to particles comprising a core and a shell, a method of producing said particle, various uses of said particle as well as various products comprising said particle. The particle according to the invention may be used as photocatalyst, as antibacterial agent, as cleaning agent, as anti-fogging agent and as decomposing agent. Furthermore the particle is applicable as solar cells.
摘要:
A semiconductor device in which a capacitor (2) is provided on a surface (10) of a semiconductor body (3) with a semiconductor element (1) in which a lower electrode (11), an oxidic ferroelectric dielectric (12) and an upper electrode (13) are provided in that order, the upper electrode not covering an edge of the dielectric, after which an insulating layer (14) with superimposed metal conductor tracks is provided. According to the invention, the edge of the dielectric (12) not covered by the upper electrode (13) is coated with a coating layer (14, 20, or 30) practically imperviable to hydrogen, after which the device is heated in a hydrogen-containing atmosphere. Heating in a hydrogen atmosphere neutralizes dangling bonds which arise during deposition of the conductor tracks on the insulating layer, while the coating layer protects the dielectric from attacks by hydrogen. The semiconductor device then has a shorter access time.
摘要:
A method of manufacturing a semiconductor device is set forth comprising a semiconductor body (1) having a surface (2) adjoined by a semiconductor region (3) and a field oxide region (4) surrounding this region, on which surface (2) is provided a metal layer (13), in which a conductor track (17, 18) is formed, after which an isolating layer of silicon oxide (19) is deposited over the conductor track (17, 18) on the surface (2). According to the invention, before the layer of silicon oxide (19) is provided over the conductor track (17, 18), this track is provided with a top layer (16) of an oxidation-preventing material. By providing this top layer (16), it is avoided that the conductor track (17, 18) covered by silicon oxide (19) has a high electrical resistance or even an electrical interruption.
摘要:
A method of manufacturing monolayer capacitors having a ferroelectric layer on the basis of titanium as a dielectric on a substrate, the ferroelectric layer being located between a first and a second noble metal electrode, in which the ferroelectric layer is formed as a barium titanate layer having a layer thickness in the range of from 0.2 to 0.6 .mu.m in that a stable solution of salts of carbonic acids, alkoxides and/or acetyl acetonates is applied and is thermally decomposed at temperatures in the range of from 500.degree. to 700.degree. C., the solution constituting the ferroelectric layer being adjusted so that after the thermal decomposition process an excess quantity of titanium oxide of about 1 mol. % is obtained, and this coating process being repeated until the desired layer thickness is attained, after which the second noble metal electrode is provided on the ferroelectric layer.
摘要:
A method of manufacturing a semiconductor device comprising a semiconductor body (3) with a surface (10) on which capacitors (2) are provided, which form memory elements, with a lower electrode (11) including platinum, a ferroelectric dielectric material (12) and an upper electrode (13) is presented. In the method according to the invention, the electrodes (11, 13) including platinum are formed by the successive deposition on a surface of a first layer (19, 26) comprising a metal from the group titanium, zirconium, hafnium or an alloy of these metals, a second layer (20, 27) comprising platinum, and a third layer (21, 28) comprising a metal from the group titanium, zirconium, hafnium, or an alloy of these metals, upon which the semiconductor body is heated in an atmosphere containing oxygen. The first metal layer ensures a good adhesion of the electrode, the second layer acts as the electrode proper, while the third metal layer counteracts adverse effects of the first layer. Semiconductor devices having electrodes with good adhesion and a smooth surface can be manufactured in such a way. As a result, the semicondcutor device is reliable, while switching of the capacitors (2) acting as memory elements between two polarization states takes place at a positive and a negative voltage of equal value.