摘要:
Formation of a bottom electrode for an MTJ device on a silicon nitride substrate is facilitated by including a layer of ruthenium near the silicon nitride surface. The ruthenium is a good electrical conductor and it responds differently from Ta and TaN to certain etchants. Adhesion to SiN is enhanced by using a TaN/NiCr bilayer as “glue”. Thus, said included layer of ruthenium may be used as an etch stop layer during the etching of Ta and/or TaN while the latter materials may be used to form a hard mask for etching the ruthenium without significant corrosion of the silicon nitride surface.
摘要:
A method for protecting the head node of a Point to Multipoint Label Switched Path (P2MP LSP) includes: a Backup Head Node (BHN) establishes a backup LSP from the BHN to all Merge Points (MPs), where the backup LSP bypasses a Master Head Node (MHN); the MHN forwards data along an LSP already established between the MHN and the MPs; when a head node switchover condition is met, the BHN is switched to a master mode to forward data along the backup LSP established between the BHN and the MPs. A system and apparatus for protecting the head node are also provided. With the head node protection solution provided by the present disclosure, the head node is well protected and the protection mechanisms for the P2MP LSP are therefore more complete. This can further promote the scale deployment of P2MP systems.
摘要:
Embodiments of the invention provide a method for forming tantalum nitride materials on a substrate by employing an atomic layer deposition (ALD) process. The method includes heating a tantalum precursor within an ampoule to a predetermined temperature to form a tantalum precursor gas and sequentially exposing a substrate to the tantalum precursor gas and a nitrogen precursor to form a tantalum nitride material. Thereafter, a nucleation layer and a bulk layer may be deposited on the substrate. In one example, a radical nitrogen compound may be formed from the nitrogen precursor during a plasma-enhanced ALD process. A nitrogen precursor may include nitrogen or ammonia. In another example, a metal-organic tantalum precursor may be used during the deposition process.
摘要:
A method to fabricate an MTJ device and its connections to a CMOS integrated circuit is described. The device is built out of three layers. The bottom layer serves as a seed layer for the center layer, which is alpha tantalum, while the third, topmost, layer is selected for its smoothness, its compatibility with the inter-layer dielectric materials, and its ability to protect the underlying tantalum.
摘要:
Provided is a process and apparatus for separating a multi-component feed stream wherein a porous separator is used to effectively create, via permeation and phase change, at least three fractions of differing compositions.
摘要:
An MTJ MRAM cell is formed by using a reactive ion etch (RIE) to pattern an MTJ stack on which there has been formed a bilayer Ta/TaN hard mask. The hard mask is formed by patterning a masking layer that has been formed by depositing a layer of TaN over a layer of Ta on the MTJ stack. After the stack is patterned, the TaN layer serves at least two advantageous purposes: 1) it protects the Ta layer from oxidation during the etching of the stack and 2) it serves as a surface having excellent adhesion properties for a subsequently deposited dielectric layer.
摘要:
This document describes systems, devices, and methods for programmably adjusting therapy or other operative parameter values of an implantable cardiac rhythm management device using a programmer that includes a display that graphically illustrates one or more relationship between a parameter being programmed and other parameters and/or rules governing interactions between parameters.
摘要:
Method for the purification of a volatile metal hydride comprising obtaining a volatile metal hydride feed containing one or more acidic impurities, one of which is a sulfur-containing impurity; contacting the feed with an alkaline material and reacting at least a portion of the sulfur-containing impurity with the alkaline material to remove a portion of the sulfur-containing impurity from the feed and provide an intermediate purified material; and contacting the intermediate purified product with an adsorbent material to remove at least a portion of the sulfur-containing impurity from the intermediate purified material and provide a purified volatile metal hydride product.
摘要:
A method of forming barrier layers in a via hole extending through an inter-level dielectric layer and including a preformed first barrier coated onto the bottom and sidewalls of the via holes. In a single plasma sputter reactor, a first step sputters the wafer rather than the target with high energy ions to remove the barrier layer from the bottom of the via but not from the sidewalls and a second step sputter deposits a second barrier layer, for example of Ta/TaN, onto the via bottom and sidewalls. The two steps may be differentiated by power applied to the target, by chamber pressure, or by wafer bias. The second step may include the simultaneous removal of the first barrier layer from the via bottom and sputter deposition of the second barrier layer onto the via sidewalls.
摘要:
Disclosed is a serum-free freezing medium used in adipose-derived stem cells and a method for establishing an adipose-derived stem cell library. The serum-free freezing medium comprises a serum-free culture medium, dimethyl sulfoxide and a serum substitution component KSR; the defects of unstable freezing quality of the adipose-derived stem cells and influence of harmful factors in serum on the adipose-derived stem cells are solved, and the adipose-derived stem cells stored have the advantages of high survival percentage, well adherence growth and strong differentiation capacity.