摘要:
A process for producing silicon wafers which have a storage-stable surface and which can be thermally oxidized directly, that is to say, without a prior HF immersion bath, and without the addition of halogen-containing gases, it being possible to achieve an equal or better oxidation result than that achieved by including these measures.
摘要:
Silicon wafers are first subjected to an oxidative treatment and subsequey to exposure to organosilicon compounds which contain at least one radical in the molecule which is hydrolyzably bound to the silicon and at least one radical in the molecule having hydrophilic properties. Depending on the compound selected, more or less strongly hydrophilic or hydrophobic properties of the silicon surface can consequently be established under mild conditions. The wafers treated in such a manner have a high storage stability and retain their surface nature even under difficult climatic circumstances. The surface nature present after the oxidative treatment can then be restored particularly easily by hydrolysis.
摘要:
In one embodiment the present invention includes a system for securing and authorizing access to multidimensional transactional data. The system includes online analytical processing (OLAP) system and a database system. The OLAP system accesses a selection of multidimensional transactional data from the database system according to a multidimensional request. The OLAP system aggregates the selection to form aggregated information. The OLAP system filters the selection according to the authorization for the user, to form a filtered selection. In this manner the user can see accurate aggregations yet not see unauthorized data.
摘要:
A method for preparing 2-chloroethylsilanes which comprises reacting a vinylchlorosilane with hydrogen chloride in the presence of a catalyst consisting of at least one organoaluminum compound, or the product obtained from the in situ reaction of such an aluminum compound with at least one of the reactants. The catalyst may first be deactivated, if desired, by the addition of a liquid organopolysiloxane to the reaction mixture, prior to the distillation of the 2-chloroethylsilane.
摘要:
This invention relates to an improved process for preparing acyloxysilanes and acyloxysiloxanes which comprises conducting an aliphatic carboxylic acid in vapor form upwards from the bottom of a column countercurrent to the flow of a chlorosilane in which the carboxylic acid is introduced into the column at such a rate that the carboxylic acid does not exceed about 1.3 mol per gram atom of Si-bonded chlorine in the column while removing the acyloxysilane from the bottom of the column.The acyloxysiloxanes are prepared by conducting an aliphatic carboxylic acid upwards from the bottom of a column in vapor form countercurrent to the flow of a chlorosilane while introducing up to about 10 percent by weight of water based on the weight of the carboxylic acid into the column and removing the acyloxysiloxane from the bottom of the column.
摘要:
Systems and methods consistent with the invention may include receiving an indication that a software error was detected during operation of the application program, generating an error message based on the software error, the error message including an error signature, comparing the error signature with information stored in a patch library database to identify a corresponding correction patch, and correcting, when the corresponding correction patch is identified, the software error by applying the corresponding correction patch.
摘要:
In one embodiment the present invention includes a method comprising receiving a data filter for filtering a collection of data, wherein the collection of data is configured as a star schema including a fact table and dimension tables. The data filter is applied against the dimension tables to generate a modified dimension table. The modified dimension tables are applied against the fact table to produce a modified fact table. The data filter is then applied against the modified fact table to generate a second modified fact table, which is the output of the process.
摘要:
A continuous process for preparing alkylamines comprises reacting continuous streams of ammonia and alkyl halide in a molar ratio of at least 10:1 in a pressure reactor. The ultimate reaction mixture has a temperature of >80° C., a pressure of >40 bar and an ammonium halide content of >1% by weight, and comprises two phases (A) a first phase comprising at least 75% by weight of the total amount of ammonium halide formed, and (B) a second phase comprising at least 80% by weight of the total amount of alkylamine formed. The first and second phases are separated, and an alkylamine product is recovered therefrom.
摘要:
This invention relates to the preparation of organosilicon compounds by the addition of a silicon compound containing Si-bonded hydrogen to a compound having an aliphatic multiple bond in the presence of a catalyst which promotes the addition of Si-bonded hydrogen to compounds containing an aliphatic multiple bond. In this process the reactants and the catalyst are continuously introduced into a pipe-shaped reactor while the contents of the reactor, which are maintained in a liquid phase by the application of pressure are circulated in the reactor at a rate of at least 1,000 cm per minute and while the reaction mixture is continuously being removed from the reactor.
摘要:
Various embodiments of systems and methods for analyzing software-usage information are described herein. Traffic numbers are obtained from data stored in a database using measurement objects that are associated with one or more keys. The measurement objects output the traffic numbers and the one or more keys are related to elements of the data. Identifiers and categories are assigned to the measurement objects. The categories represent attributes of a software product. A data structure comprising the identifiers, the traffic numbers, and the categories is generated and stored. The stored data structure and a header comprising one or more fields are used to generate a report.