Abstract:
Novel anchor designs for thin film packages are disclosed which, in a preferred embodiment are a combination of SiGe-filled trenches and Si-oxide-filled spacing. Depending on the release process, additional manufacturing process steps are to be performed in order to obtain the desired mechanical strength. For aggressive release processes, additional soft sputter etch and a Ti-TiN interlayer in the anchor region may be needed. The ratio of the total SiGe-SiGe anchor area to the SiO 2 -SiGe anchor area determines also the mechanical strength of the anchor. If this ratio is larger than 1, the thin film package reaches the MIL-standard requirements.
Abstract:
The present disclosure proposes a method for manufacturing in a MEMS device a low-resistance contact between a silicon-germanium layer and a layer contacted by this silicon-germanium layer, such as a CMOS metal layer or another silicon-germanium layer, through an opening in a dielectric layer stack separating both layers. An interlayer is formed in this opening, thereby covering at least the sidewalls of the opening on the exposed surface of the another layer at the bottom of this opening. This interlayer may comprise a TiN layer in contact with the silicon-germanium layer. This interlayer can further comprise a Ti layer in between the TiN layer and the layer to be contacted. In another embodiment this interlayer comprises a TaN layer in contact with the silicon-germanium layer. This interlayer can then further comprise a Ta layer in between the TaN layer and the layer to be contacted.
Abstract:
A method is disclosed for manufacturing a sealed cavity comprised in a microelectronic device, comprising forming a sacrificial layer at least at locations where the cavity is to be provided, depositing a membrane layer on top of the sacrificial layer, patterning the membrane layer in at least two separate membrane layer blocks, removing the sacrificial laye through the membrane layer, and sealing the cavity by sealing the membrane layer, wherein patterning the membrane layer is performed after removal of the sacrificial layer; and associated microelectronic devices.
Abstract:
Novel anchor designs for thin film packages are disclosed which, in a preferred embodiment are a combination of SiGe-filled trenches and Si-oxide-filled spacing. Depending on the release process, additional manufacturing process steps are to be performed in order to obtain the desired mechanical strength. For aggressive release processes, additional soft sputter etch and a Ti-TiN interlayer in the anchor region may be needed. The ratio of the total SiGe-SiGe anchor area to the SiO 2 -SiGe anchor area determines also the mechanical strength of the anchor. If this ratio is larger than 1, the thin film package reaches the MIL-standard requirements.
Abstract:
The present disclosure proposes a method for manufacturing in a MEMS device a low-resistance contact between a silicon-germanium layer and a layer contacted by this silicon-germanium layer, such as a CMOS metal layer or another silicon-germanium layer, through an opening in a dielectric layer stack separating both layers. An interlayer is formed in this opening, thereby covering at least the sidewalls of the opening on the exposed surface of the another layer at the bottom of this opening. This interlayer may comprise a TiN layer in contact with the silicon-germanium layer. This interlayer can further comprise a Ti layer in between the TiN layer and the layer to be contacted. In another embodiment this interlayer comprises a TaN layer in contact with the silicon-germanium layer. This interlayer can then further comprise a Ta layer in between the TaN layer and the layer to be contacted.
Abstract:
A method is disclosed for manufacturing a sealed cavity comprised in a microelectronic device, comprising forming a sacrificial layer at least at locations where the cavity is to be provided, depositing a membrane layer on top of the sacrificial layer, patterning the membrane layer in at least two separate membrane layer blocks, removing the sacrificial laye through the membrane layer, and sealing the cavity by sealing the membrane layer, wherein patterning the membrane layer is performed after removal of the sacrificial layer; and associated microelectronic devices.
Abstract:
Novel anchor designs for thin film packages are disclosed which, in a preferred embodiment are a combination of SiGe-filled trenches and Si-oxide-filled spacing. Depending on the release process, additional manufacturing process steps are to be performed in order to obtain the desired mechanical strength. For aggressive release processes, additional soft sputter etch and a Ti-TiN interlayer in the anchor region may be needed. The ratio of the total SiGe-SiGe anchor area to the SiO 2 -SiGe anchor area determines also the mechanical strength of the anchor. If this ratio is larger than 1, the thin film package reaches the MIL-standard requirements.