Chinese Academy of Sciences

Beijing Qihoo Technology Company Limited

Qizhi Software (beijing) Company Limited

Jinping Chen

Wei Lin

Yi Zeng

Qingshan Hao

Tianjun Yu

A method and device for classifying webpages are provided. The method comprises: parsing a plurality of webpage elements from a webpage to be predicted; predicting a candidate webpage classification to which the webpage to be predicted belongs respectively according to respective webpage elements; and determining a final webpage classification of the webpage to be predicted by comparing the candidate webpage classifications predicted respectively based on the respective webpage elements.

Method and device for classifying webpages

Disclosed is a molecular glass of a spirofluorene derivative having a molecular structure as follows: formula (I), wherein each of R-Ris a hydrogen atom, a hydroxyl group, a methoxyl group or an acid-sensitive substituent; substituents R&#x2dc;Rcan be identical or different, but on the same benzene ring the substituents cannot all be hydrogen atoms. The molecular glass has a good solubility in various polar solvents, is suitable to be made into a film; meanwhile the molecular glass has a very high glass transition temperature and meets the requirements of the photolithography processing technology. Also disclosed is a preparation method of the above-mentioned molecular glass of a spirofluorene derivative. The synthetic process of the method is simple and suitable for industrialization. Further disclosed is the use of a photo-resist with the above-mentioned molecular glass as a main material in photo-etching, wherein the molecular glass of a spirofluorene derivative with hydroxyl groups (or partly with hydroxyl groups) on the periphery thereof can be used as a negative photo-resist, and the molecular glass with the hydroxyl groups on the periphery thereof protected (or partly protected) by an acid-sensitive substituent can be used as a positive photo-resist.

Molecular glass of spirofluorene derivative, preparation method thereof and use thereof in photo-etching

Growing community of inventors

Beijing, China

Jinping Chen