Abstract:
The invention relates to a method for producing a ferroelectric capacitor, especially in large-scale integrated, non-volatile semiconductor memories, and to an integrated ferroelectric semiconductor memory arrangement. In order to prevent damage to the ferro- or paraelectric (6), a TaSixNy barrier layer (7) is deposited over the capacitor module (1). The TaSixNy material has barrier properties in relation to hydrogen diffusion and Ti diffusion.
Abstract:
Production of an insulation layer, functioning as an inter-metal dielectric (IMD), involves: (a) covering a substrate surface (2) with a first insulating layer (3) and then a metal (preferably aluminium) layer; (b) photo-structuring the metal layer to form circuit lines (4) which are then covered with a second insulating layer (7) on their surfaces and side faces (6); (c) removing the second insulating layer material (7) from the first insulating layer regions (3) between the circuit lines (4); and (d) depositing a third insulating layer (8) on the resulting structure by ozone-activated CVD with a growth rate which is greater on the first insulating layer material (3) than on the second insulating layer material (7). Preferably, the first insulating layer material (3) is phosphosilicate glass, borophosphosilicate glass or undoped silicate glass and the second insulating layer material (7) is titanium nitride.
Abstract:
Metal structures that can be produced by a damascene process are disposed in a first insulating layer and a second insulating layer is disposed above the latter. There is in each case at least one cavity which is disposed between the metal structures, is disposed in the first insulating layer and is covered by the second insulating layer. The cavities and the metal structures are produced next to one another by self-aligned process steps.
Abstract:
A method for improving the adhesion between a noble metal layer and an insulation layer includes configuring a silicon layer between the noble metal layer and the insulation layer. The silicon layer is siliconized and oxidized by a thermal treatment in an oxidative environment, resulting in an oxidized silicide layer with high intermixing of the noble metal and the formed oxide. The relatively large inner surface achieved as a result improves the adhesion between the noble metal layer and the insulation layer.
Abstract:
Production of a microelectronic component comprises: (i) forming a storage capacitor containing a first electrode, a second electrode and a ferroelectric or paraelectric dielectric on a substrate; and (ii) forming a barrier on the capacitor to prevent the hydrogen passing through. The hydrogen barrier is produced by forming a silicon oxide layer (41), tempering the capacitor and at least a part of the silicon oxide layer, and applying a barrier layer (42) to the tempered silicon oxide layer. Preferred Features: At least a part of the barrier layer is applied in a hydrogen-free deposition process. A first partial layer of the barrier layer is initially applied followed by a second partial layer of silicon nitride. The silicon nitride layer is deposited using a low pressure microwave process. The silicon oxide layer has partial layers (411, 412).
Abstract:
A method for the shrink-hole-free filling of trenches in semiconductor circuits which utilizes selective growth of a layer to be applied is described. In the method, a layer of a selective growing material is applied simultaneously to a growth-promoting layer and to a growth-inhibiting layer. Wherein raised portions which, before the layer of selective growing material is applied, are covered by the growth-inhibiting layer at least on their sides. After the growth-inhibiting layer has been applied, the growth-promoting layer is generated by anisotropic treatment on surfaces parallel to the substrate on and between the raised portions and the layer is then removed again on surfaces parallel to the substrate on the raised portions. The method makes it possible to produce in a particularly simple manner a pattern on the raised portions of which are covered by the growth-inhibiting layer on their sides and on their top whereas the bottom of trenches is covered with a growth-promoting layer.
Abstract:
Substrate comprises a first insulating layer (I1) on the substrate, a second insulating layer (I2) on the first insulating layer, hollow chambers (H) arranged in the first insulating layer which cover the second insulating layer, and metal structures (MS) arranged on a horizontal surface. The hollow chambers are arranged so that they do not border the metal structures, where at least one hollow chamber is arranged between the metal structures. The whole horizontal cross-sections of the chambers are the same in the first insulating layer. An Independent claim is also included for a process for the production of the substrate. Preferred Features: The first insulating layer is made of silicon nitride and the second insulating layer is made of SiO2.
Abstract:
A conduction path arrangement has a substrate (1,2), at least two conduction paths (4), formed adjacent to one another over the substrate, and a cavity which is formed at least between the conduction paths (4), and a dielectric covering layer (5) covering the conduction paths and enclosing the cavity. The support paths (TB) between the substrate (1,2) and the conduction paths (4) are designed to support the conduction paths, in which on the contact surface, a width (B1) of the conduction paths is greater than a width (B2) of the support paths (TB). An independent claim is included for a method for fabrication a conduction path arrangement.
Abstract:
In a method for manufacturing a layer arrangement, a plurality of electrically conductive structures are embedded in a substrate. Material of the substrate is removed at least between adjacent electrically conductive structures. An interlayer is formed on at least one portion of sidewalls of each of the electrically conductive structures. A first layer is formed on the interlayer where an upper partial region of the interlayer remaining free of a covering with the first layer. An electrically insulating second layer is formed selectively on that partial region of the interlayer which is free of the first layer, in such a way that the electrically insulating second layer bridges adjacent electrically conductive structures such that air gaps are formed between adjacent electrically conductive structures.
Abstract:
A method for producing a layer arrangement is disclosed. A layer of oxygen material and nitrogen material is formed over a substrate that has a plurality of electrically conductive structures and/or over a part of a surface of the electrically conductive structures. The layer is formed using a plasma-enhanced chemical vapor deposition process with nitrogen material being supplied during the supply of silicon material and oxygen material by means of an organic silicon precursor material. The layer of oxygen material and nitrogen material is formed in such a manner that an area free of material remains between the electrically conductive structures. An intermediate layer including an electrically insulating material is formed over the layer of oxygen material and nitrogen material. A covering layer is selectively formed over the intermediate layer such that the area free of material between the electrically conductive structures is sealed from the environment and forms a cavity.